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Evaluation and screening for resistance of some varieties(lines)to major diseases and insect pests of rice
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作者 SHEN Ying HU Guowen CNRRL Hangzhou 310006,China 《Chinese Rice Research Newsletter》 1991年第2期3-3,共1页
During 1984-1988,2,231 varieties(lines)from International Rice Testing Program(IRTP)were evaluated and screened for resistance to riceblast(Bl),bacterial blight(BB),sheath blight
关键词 Evaluation and screening for resistance of some varieties lines)to major diseases and insect pests of rice
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A Review on the Application of Deep Learning Methods in Detection and Identification of Rice Diseases and Pests
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作者 Xiaozhong Yu Jinhua Zheng 《Computers, Materials & Continua》 SCIE EI 2024年第1期197-225,共29页
In rice production,the prevention and management of pests and diseases have always received special attention.Traditional methods require human experts,which is costly and time-consuming.Due to the complexity of the s... In rice production,the prevention and management of pests and diseases have always received special attention.Traditional methods require human experts,which is costly and time-consuming.Due to the complexity of the structure of rice diseases and pests,quickly and reliably recognizing and locating them is difficult.Recently,deep learning technology has been employed to detect and identify rice diseases and pests.This paper introduces common publicly available datasets;summarizes the applications on rice diseases and pests from the aspects of image recognition,object detection,image segmentation,attention mechanism,and few-shot learning methods according to the network structure differences;and compares the performances of existing studies.Finally,the current issues and challenges are explored fromthe perspective of data acquisition,data processing,and application,providing possible solutions and suggestions.This study aims to review various DL models and provide improved insight into DL techniques and their cutting-edge progress in the prevention and management of rice diseases and pests. 展开更多
关键词 Deep learning rice diseases and pests image recognition object detection
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Social Cost Analysis of Biological Control Technology for Crop Diseases and Insect Pests
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作者 Jie XIE Lingling XIAO +4 位作者 Jinyu ZHAO Shoumei WAN Jian TANG Xiaolei JI Jing PENG 《Asian Agricultural Research》 2024年第8期14-16,共3页
With the rapid development of modern agriculture,the prevention and control of crop diseases and insect pests has become an important part to ensure the safety of agricultural production,the quality of agricultural pr... With the rapid development of modern agriculture,the prevention and control of crop diseases and insect pests has become an important part to ensure the safety of agricultural production,the quality of agricultural products and the safety of agricultural ecological environment.Although the effect of traditional chemical prevention and control technology is remarkable,the health risks and environmental problems brought by it should not be ignored.As a green and environmentally friendly means of prevention and control,biological prevention and control technology has gradually become a hot research topic and a trend of agricultural production.This paper is intended to comprehensively evaluate the social costs of biological control technologies for crop diseases and pests,including the health risks reduced,environmental improvements,economic benefits,and barriers to promotion,and put forward corresponding policy recommendations. 展开更多
关键词 CROPS diseases and insect pests BIOLOGICAL control SOCIAL cost
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Effects of Rice-duck Mutualism on Diseases Insect Pests and Weeds and Economic Benefits 被引量:1
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作者 邓强辉 潘晓华 《Agricultural Science & Technology》 CAS 2008年第1期128-133,138,共7页
[Objective] Study on the effects of rice-duck mutualism on weeds and insects pests and economic benefits of paddy field. [Method] Comparison of the incidence of weeds, sheath blight and insects pest under rice-duck mu... [Objective] Study on the effects of rice-duck mutualism on weeds and insects pests and economic benefits of paddy field. [Method] Comparison of the incidence of weeds, sheath blight and insects pest under rice-duck mutualism, conventional cultivation and control treatment, the yield and economic benefits were analyzed under the 3 treatments. [Result] Average occurrence of weeds in rice-duck mutualism group decreased by 2.33 and 52.0g ind/m^2 compared with that in conventional cultivation and control treatment ; the control rate of mutualism was up to 75% against rice hopper, but just between 25% -60% against rice leaf roller and Chilo suppressalis. The rates of diseased plant and diseased bell against rice sheath blight were higher and disease indices were lower compared with control group. The yield of mutualism group was identical with conventional cultivation, Which was greatly higher than that of control group. The results suggested an higher economic benefits and lower cost benefit ratio for rice-duck mutualism treatment. [Conclusion] Rice-duck mutualism gives birth to a positive effect to control the diseases, insect pests and weeds, as well as to economic benefits, providing basis on extension of rice-duck mutualism system. 展开更多
关键词 rice-duck mutualism Disease insect pest and weeds Economic benefits
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Effects of silicon amendment on the occurrence of rice insect pests and diseases in a field test 被引量:7
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作者 HAN Yong-qiang WEN Ji-hui +2 位作者 PENG Zhao-pu ZHANG De-yong HOU Mao-lin 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第10期2172-2181,共10页
Rice is one of the most important staple foods for the world population,but it is attacked by a number of destructive pests.While evidence from greenhouse and laboratory tests has shown that silicon(Si)amendment can... Rice is one of the most important staple foods for the world population,but it is attacked by a number of destructive pests.While evidence from greenhouse and laboratory tests has shown that silicon(Si)amendment can confer enhanced resistance to pests in rice,few studies have directly demonstrated the Si-mediated protection from pests in a field situation.In this study,field plots with silicon amendments at 0,75,150 and 300 kg SiO2 ha-1 in early-and late-season rice were employed to evaluate the effects of silicon amendment on the occurrence of major insect pests and diseases and rice yield.Compared with the control plots without silicon amendment,plant damage by stem borer and leaf folder and population size of planthopper were significantly lower in three to five of the seven monitoring observations in each season in the plots amended with 300 kg SiO2 ha-1.The disease index of rice blast in the early-season rice was lower in the plots amended with Si at 300 kg SiO2 ha-1 than in the control plots,while Si protection from rice blast in the late-season rice and from rice sheath blight in the early-season rice were not apparent.An insignificant increase of rice yield by 16.4%(604 kg ha-1)was observed in the plots amended with 300 kg SiO2 ha-1 over the control plots.Our results indicate that Si amendment at 300kg SiO2 ha-1 can provide substantial protection from some of the rice pests under field conditions.These findings support the recommendation of silicon amendment as a key component of integrated management of rice pests. 展开更多
关键词 silicon rice insect pest DISEASE YIELD plant resistance
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Species and Control Techniques of Main Diseases and Insect Pests of Camellia oleifera in Anhui Province
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作者 Juanjuan HU Hao SONG +5 位作者 Zhihua CAO Yulu CHEN Jie WANG Wangsheng ZHU Dewu YAO Bangxing HAN 《Plant Diseases and Pests》 CAS 2023年第3期1-4,13,共5页
[Objectives]The paper was to master the species,incidence regularity and control techniques of main diseases and insect pests of Camellia oleifera in Anhui Province.[Methods]The species of main diseases and insect pes... [Objectives]The paper was to master the species,incidence regularity and control techniques of main diseases and insect pests of Camellia oleifera in Anhui Province.[Methods]The species of main diseases and insect pests of C.oleifera in major C.oleifera afforestation bases and seedling bases in Anhui Province were investigated through field survey and literature search.Afterwards,the symptom characteristics,occurrence regularity and harms of diseases and insect pests were analyzed,and scientific and reasonable control techniques were put forward.[Results]The main diseases of C.oleifera in Anhui Province were soft rot disease,blister blight,anthracnose,sooty blotch,etc.,and the main insect pests were Euproctis pseudoconspersa,Biston marginata,Hypomeces squamosus,Curculio chinensts,Chrenoma atritarsis,etc.The control techniques mainly included ecological regulation,physical prevention and control,chemical prevention and control,and biological prevention and control.[Conclusions]The results will promote the high-quality development of C.oleifera industry in Anhui Province,and contribute to the improvement of China s edible vegetable oil supply and national grain and oil security. 展开更多
关键词 Anhui Province Camellia oleifera diseases insect pests Prevention and control technique
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Effects of Six Cultivation Patterns on Occurrence of Major Diseases and Pests and Yield of Rice 被引量:1
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作者 张舒 吕亮 +3 位作者 常向前 程建平 余永志 钟爱荣 《Agricultural Science & Technology》 CAS 2016年第3期700-707,共8页
The occurrence rules of major diseases and pests in rice were investigated under six cultivation patterns, i.e., mechanical plowing-artificial transplanting, mechanical plowing-mechanical transplanting, mechanical plo... The occurrence rules of major diseases and pests in rice were investigated under six cultivation patterns, i.e., mechanical plowing-artificial transplanting, mechanical plowing-mechanical transplanting, mechanical plowing-scattered transplanting,cattle plowing-artificial transplanting, cattle plowing-mechanical transplanting and cattle plowing-scattered transplanting. The results showed that the six cultivation patterns showed small effects on the occurrence of rice sheath blight, second-generation rice planthopper, rice stem borer and rice false smut, but showed great effects on the occurrence of rice leaf folder, third-and fourth-generation rice planthopper and weeds; there were certain differences in the rice yield among different cultivation patterns, and the rice yield under the pattern of mechanical plowing-mechanical transplanting ranked first, while that under the pattern of cattle plowing-scattered transplanting ranked last. 展开更多
关键词 Cultivation pattern rice Disease PEST WEED Effect
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Application of Self-propelled Boom Sprayers for Control of Rice Insects and Diseases 被引量:1
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作者 龚艳 于林惠 +3 位作者 张晓 王果 陈伟 陈晓 《Agricultural Science & Technology》 CAS 2016年第7期1667-1670,共4页
Comparisons were performed between self-propelled boom sprayer and traditional mechanis, such as knapsack sprayer and sprayer-duster, stretcher-type powered sprayer, as well as single rotor unmanned sprayer and multi-... Comparisons were performed between self-propelled boom sprayer and traditional mechanis, such as knapsack sprayer and sprayer-duster, stretcher-type powered sprayer, as well as single rotor unmanned sprayer and multi-rotor un- manned sprayer. The effects on rice injury, lodging, and rehabilitation were conclud- ed and drug uniform distribution, sedimentation and prevention effects were ana- lyzed. The results showed that the self-propelled boom sprayer is characterized by high degree of automation, convenient operation, high adaptability, and high work efficiency. What's more, the sprayed fog quality is better, and fog distribution is more uniform. During the work process, fog loss would be diminished substantially, improving work efficiency and cutting down drug and water. It is notable that the underpart of the sprayer can be widely applied to plant protection in large-scale ar- eas in Jiangsu Province, significantly advancing whole-process mechanization of rice production. 展开更多
关键词 rice SELF-PROPELLED SPRAYERS insect and disease control Deposition distribution
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Effect of Nitrogen Fertilizer on Herbivores and Its Stimulation to Major Insect Pests in Rice 被引量:15
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作者 LU Zhong-xian YU Xiao-ping +1 位作者 Kong-luen HEONG HU Cui 《Rice science》 SCIE 2007年第1期56-66,共11页
Nitrogen is one of the most important factors in development of herbivore populations. The application of nitrogen fertilizer in plants can normally increase herbivore feeding preference, food consumption, survival, g... Nitrogen is one of the most important factors in development of herbivore populations. The application of nitrogen fertilizer in plants can normally increase herbivore feeding preference, food consumption, survival, growth, reproduction, and population density, except few examples that nitrogen fertilizer reduces the herbivore performances. In most of the rice growing areas in Asia, the great increases in populations of major insect pests of rice, including planthoppers (Nilaparvata lugens and Sogatella furcifera), leaffolder ( Cnaphalocrocis rnedinalis), and stem borers (Scirpophaga incertulas, Chilo suppressalis, S. innotata, C. polychrysus and Sesarnia inferens) were closely related to the long-term excessive application of nitrogen fertilizers. The optimal regime of nitrogen fertilizer in irrigated paddy fields is proposed to improve the fertilizer-nitrogen use efficiency and reduce the environmental pollution. 展开更多
关键词 nitrogen fertilizer HERBIVORE insect pests rice fertilizer-nitrogen use efficiency
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Analysis and Study on Characteristics and Detection Methods of Cotton Diseases and Insect Pests
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作者 Chao ZHU Wanlin SUN +1 位作者 Chen HAN Miao WANG 《Plant Diseases and Pests》 CAS 2022年第4期17-22,30,共7页
[Objectives]The paper was to find the diseases and insect pests in the process of cotton growth quickly,effectively and timely.[Methods]The growth process of cotton was dynamically monitored by UAV aerial photography,... [Objectives]The paper was to find the diseases and insect pests in the process of cotton growth quickly,effectively and timely.[Methods]The growth process of cotton was dynamically monitored by UAV aerial photography,and the aerial data map was converted into geotif image with longitude and latitude and then inputted into the detection system for preprocessing,mainly for image feature extraction and classification.Through deep learning of MATLAB software and BP neural network algorithm,the feature similarity of the images in the established characteristic database of cotton diseases and insect pests was compared.[Results]Through comparative analysis of characteristics of a large number of diseases and insect pests,it was found that deep learning method had high discrimination accuracy and good reliability.[Conclusions]The dynamic detection system using deep learning can well find cotton diseases and insect pests,and achieve early detection and early treatment,so as to effectively improve the yield and quality of cotton. 展开更多
关键词 Cotton diseases and insect pests Characteristic map UAV MATLAB Deep learning
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Integrated Prevention and Control Technology of Major Diseases and Insect Pests of Strawberry
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作者 Yang Lei Yang Li +2 位作者 Li Li Du Runsheng Dong Hui 《Plant Diseases and Pests》 CAS 2020年第2期31-34,共4页
In order to effectively deal with the problems of diseases and insect pests in the growth process of strawberry and to improve the quality and yield of strawberry,the main diseases and insect pests in strawberry culti... In order to effectively deal with the problems of diseases and insect pests in the growth process of strawberry and to improve the quality and yield of strawberry,the main diseases and insect pests in strawberry cultivation such as powdery mildew,gray mold,anthracnose,red stele root rot,calcium deficiency,salt or fertilizer damage,aphids,red spiders,thrips,grubs,etc.and their identification methods were analyzed.The comprehensive pollution-free prevention and control techniques of these pests and diseases were explored,in order to provide technical guidance for high quality,efficient and harmless production of strawberry. 展开更多
关键词 STRAWBERRY diseases and insect pests Comprehensive prevention and control
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Species and Occurrence Regularity of Diseases and Insect Pests Harming Baccaurea ramiflora Lour. in Guangxi
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作者 Zhiqiang YANG Yanchun LU +5 位作者 Xianghua WANG Ting JIANG Dejin TAN Dongying XU Chong PENG Wen HE 《Plant Diseases and Pests》 CAS 2022年第1期9-12,共4页
[Objectives]The paper was to understand the species and harm of diseases and insect pests of Baccaurea ramiflora Lour.in Guangxi,and to provide basis for the prevention and control of diseases and insect pests.[Method... [Objectives]The paper was to understand the species and harm of diseases and insect pests of Baccaurea ramiflora Lour.in Guangxi,and to provide basis for the prevention and control of diseases and insect pests.[Methods]From 2018 to 2021,a systematic investigation on diseases and insect pests of B.ramiflora was conducted in Dongxing City,Fangchenggang City,Longzhou County,Pingxiang City,Jingxi City and Napo County in Guangxi.[Results]There were 22 species of diseases and insect pests that harmed B.ramiflora in Guangxi,7 of which were diseases and 15 were insect pests.Leaf blight(Fuasrium spp.)was the main disease at seedling stage,causing severe damage,and anthracnose(Colletotrichum gloeosporioides Penz.)caused moderate damage.Cyclosia papilionaris Drury and Chrysochus chinensis Baly had high frequency of occurrence,wide damage area and severe damage.Cyclosia panthono Stoll and Lcerya aegyptiaca Douglas caused moderate damage,while other insect pests caused light damage.[Conclusions]The study lays a foundation for the scientific prevention and control of B.ramiflora diseases and insect pests,and promotes the sustainable and rapid development of B.ramiflora industry in Guangxi. 展开更多
关键词 Baccaurea ramiflora Lour. diseases and insect pests Species investigation
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Green Prevention and Control Technology against Main Diseases and Insect Pests of Facility Tomato
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作者 Hongping Tian Fujun Li +1 位作者 Guocai Lu Chunhua Li 《Plant Diseases and Pests》 CAS 2021年第4期28-29,共2页
In recent years,with the increasing planting area of facility tomato,diseases and insect pests such as tomato grey mold(Botrytis cinerea),early blight(Alternaria solani),late blight(Phytophthora infestans),and whitefl... In recent years,with the increasing planting area of facility tomato,diseases and insect pests such as tomato grey mold(Botrytis cinerea),early blight(Alternaria solani),late blight(Phytophthora infestans),and whitefly(Trialeurodes uaporariorum) occur frequently,causing severe harms and difficulties in prevention and control.In order to ensure the normal production of facility tomato and improve the yield and quality of tomato,the corresponding prevention and control measures are put forward according to the regularity of the occurrence of diseases and insect pests and the characteristics of facility environment,which has certain guiding significance for agricultural production. 展开更多
关键词 Facility tomato diseases and insect pests Prevention and control
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A Brief Introduction of Main Diseases and Insect Pests in Soybean Production in the Global Top Five Soybean Producing Countries
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作者 Zhang Xiaoming Li Qiong 《Plant Diseases and Pests》 CAS 2018年第1期17-21,共5页
The United States, Brazil, Argentina, India and China are the major soybean producing countries in the world. Nearly 90% of the world^s soybean production comes from these countries. The occurrence of diseases and i... The United States, Brazil, Argentina, India and China are the major soybean producing countries in the world. Nearly 90% of the world^s soybean production comes from these countries. The occurrence of diseases and insect pests often lead to the reduction of soybean yield, and brings varying degree losses to these countries. This article provides an overview of the impact and measures on soybean main diseases and insect pests in the top five major soybean producing countries over the world. It is concluded that the diseases affecting the soybean yield seriously include Phakopsorapachyrhizi, Heterodera glycines, Septoria glycines, Colletotrichum spp. and Macrophominaphaseolina; and the main insect pests include Anticarsia gemmatalis, Spodoptera litura, Nezara viridula and Frankliniella occidentalis, which will provide information for key prevention and control of soybean main diseases and insect pests in these countries. 展开更多
关键词 SOYBEAN Production diseases insect pests Control
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Occurrence and Control of Main Soybean Diseases and Insect Pests in Greater Mekong Sub-region
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作者 Qiong LI Hongbin LYU +2 位作者 Lu FENG Mingliang DING Xiaoming ZHANG 《Agricultural Biotechnology》 CAS 2018年第3期60-62,136,共4页
Soybean rust,soybean downy mildew,and soybean thrips,soybean pod borers,and soybean nocturnal moths are the world wide diseases and insect pests in soybean production,which pose a potential threat to soybean productio... Soybean rust,soybean downy mildew,and soybean thrips,soybean pod borers,and soybean nocturnal moths are the world wide diseases and insect pests in soybean production,which pose a potential threat to soybean production in Great Mekong Sub-region( GMS),comprising Cambodia,Lao People's Democratic Republic,Myanmar,Thailand,Vietnam,and Yunnan province,the People's Republic of China. This paper summarized the host range,epidemiology,damage and control methods of these diseases and insect pests in GMS,with the aim to provide information basis for understanding and effective control of soybean diseases and insect pests in GMS. 展开更多
关键词 SOYBEAN DISEASE insect pest OCCURRENCE Control GMS
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The Predatory Function of Three Spiders to Two Insect Pests in Rice Within a Multi-species Co-existence System
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作者 LI Jian-quan, SHEN Zuo-rui and ZHAO Zhi-mo( College of Plant Protection , China Agricultural University, Beijing 100094 , P.R. China Department of Plant Protection , South-west Agricultural University, Chongqing 400716 , P.R. China) 《Agricultural Sciences in China》 CAS CSCD 2002年第4期391-396,共6页
The prey-seeking behavior of three spiders (X1-Pirata subpiraticus, X2-Clubiona japonicola and X3-Tetragnatha japonica) for brown plant hopper (X4-Nilaparvata lugens) and rice spittle bug (X5-Cal-litettix versicolor) ... The prey-seeking behavior of three spiders (X1-Pirata subpiraticus, X2-Clubiona japonicola and X3-Tetragnatha japonica) for brown plant hopper (X4-Nilaparvata lugens) and rice spittle bug (X5-Cal-litettix versicolor) was investigated, as well as how interference between and within species occurred, by using a quadratic regression rotational composite design. Six predation models derived from the analysis of interactions among and within predators and preys were developed. The total predatory capacity of spiders on rice insect pests after coexistence for one day can be expressed as follows: Y3 = 32.795 + 2.25X1 + 1.083X2 + 0.5X3 + 10.167X4 + 3.167X5 - 1.67X12 - 2.42X22 - 3.295X32 - 0.045X42 + 0.455X52 - 3.125X1X2 + 0.375X1X3 -0.625X1X4 - 0.375X1X5 + 0.375X2X3 - 0.875X2X4 + 0.125X2X5 + 0.375X3X4 - 0.375X3X5 + 0.125X4X5. The principal efficiency analysis using this model indicated that increases in insect pest density significantly increased predation by predators; this was much greater than the effect of any single predator. X4 had a greater effect than X5; however, X4 and X5 demonstrated little interspecific interference and even promoted each other and increased predation rates as the densities of the two pests increased. Among the three predators, an increase in the density of X, had the greatest effect on the increase in predation, X3 had the second, X2 the third greatest effect. As predator density increased inter- and intra-species interference occurred, which were largely related to the size, activity, niche breadth, niche overlap and searching efficiency of the predators. X2 produced the greatest interference between different individuals and between any other predator species. X3 had the second greatest, which reduced predation levels at high predator densities. Because of these factors, the highest predation rate was obtained at a prey density of 120 per 4 rice-hills. The optimal proportion of the three predators in the multi-predator prey system was X1: X2: X3 = 5.6:1.3:4.1. 展开更多
关键词 Spiders Predation BIO-CONTROL Intra-species relationships Co-existence system Interaction Intraspecific competition Interspecific competition Animal behavior Natural enemies rice insect pest
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A Novel Agricultural Data Sharing Mode Based on Rice Disease Identification
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作者 Mengmeng ZHANG Xiujuan WANG +3 位作者 Mengzhen KANG Jing HUA Haoyu WANG Feiyue WANG 《Plant Diseases and Pests》 2024年第2期9-16,共8页
In this paper,a variety of classical convolutional neural networks are trained on two different datasets using transfer learning method.We demonstrated that the training dataset has a significant impact on the trainin... In this paper,a variety of classical convolutional neural networks are trained on two different datasets using transfer learning method.We demonstrated that the training dataset has a significant impact on the training results,in addition to the optimization achieved through the model structure.However,the lack of open-source agricultural data,combined with the absence of a comprehensive open-source data sharing platform,remains a substantial obstacle.This issue is closely related to the difficulty and high cost of obtaining high-quality agricultural data,the low level of education of most employees,underdeveloped distributed training systems and unsecured data security.To address these challenges,this paper proposes a novel idea of constructing an agricultural data sharing platform based on a federated learning(FL)framework,aiming to overcome the deficiency of high-quality data in agricultural field training. 展开更多
关键词 rice disease and pest identification Convolutional neural networks Distributed training Federated learning(FL) Open-source data sharing platform
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Biological control of rice disease and insect by chitinase-producing bacterium X2-23 被引量:1
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作者 CHEN Hong LI Ping GUI Yao WANG Lingxia MA Bingtian ZHENG Aiping, Sichuan Agri Biotechnology Engineering Research Center,Rice Res Inst,Sichuan Agri Univ,Wenjiang 611130,China 《Chinese Rice Research Newsletter》 2002年第3期22-22,共1页
Enriched by the-medium containingchitin and cell wall of Phizoctoniasolani AG-1,a bacterium X2-23 withhigher chitinase activity was isolatedfrom 166 chitinase-producing bacteria.It could distinctly inhibit the fungi
关键词 Biological control of rice disease and insect by chitinase-producing bacterium X2-23
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Effect of Silicon and Nitrogen Nutrition on Pest and Disease Intensity in Rice 被引量:1
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作者 Kasthuri Rajamani Bhupal Raj Gunti +1 位作者 Shashi Vemuri Ramesh Bellamkonda 《Journal of Agricultural Science and Technology(A)》 2013年第7期568-574,共7页
Nutrition management is the most important for high yield production but it may affect the response of rice plants to pest and diseases due to the change of microclimate under rice plant canopy. The knowledge of nutri... Nutrition management is the most important for high yield production but it may affect the response of rice plants to pest and diseases due to the change of microclimate under rice plant canopy. The knowledge of nutrition management and its relation with pest and diseases are basis for setting up a high yield production system. Most of the pest and disease control procedures used by farmers can be considered as soil fertility management and these nutrition practices can have impact on the physiological susceptibility of crop plants to pest and diseases by affecting the plant resistance. Silicon content of plants is particularly effective against pest and diseases in rice and certain rice genotypes are more efficient accumulators of silicon, thus making them more resistant. In the absence of natural heritable resistance in rice varieties, resistance could be induced by altemate strategies to suppress certain pest and pathogens. Hence experiments were carried out in two stages during kharif 2010 and 2011 to assess the concentration of silicon in the index leaves of rice plant utilizing 133 varieties in four locations. The silica content of promising varieties ranged from 1.50% to 3.20%, 1.60% to 3.15%, 1.49% to 3.20% and 1.55% to 3.06% with a mean values of 2.50%, 2.48%, 2.51% and 2.43% at Jagtial, Warangal, Rajendranagar and Rudrur centres of Telangana region and not much variation in mean silica content in index leaves at different places. The overall yield from four locations ranged from 2,653 kg/ha to 6,860 kg/ha with a mean of 5,624 kg/ha. The yields recorded at Jagtial, Warangal, Rajendranagar and Rudrur centres ranged from 2,886 to 7,198, 2,653 to 6,831, 2,653 to 6,860 and 4,399 to 5,950 kg/ha, respectively. The lowest mean yield 5,069 kg/ha was noticed at Rudrur and the highest yield 5,940 kg/ha was found at Warangal. The variations in yields might be due to genotypic variations and also due to variations in climatic conditions of different locations. 展开更多
关键词 Nutrition management conventional rice silicon rice genotypes pest and diseases.
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Mapping of a New Gene Wbph6(t) Resistant to the Whitebacked Planthopper, Sogatella furcifera, in Rice 被引量:10
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作者 LIXi-ming ZHAIHu-qu +4 位作者 WANJian-min MALiang-yong ZHUANGJie-yun LIUOuang-jie YANGChang-deng 《Rice science》 SCIE 2004年第3期86-90,共5页
A rice population consisting of 90 TN1/Guiyigu F3 lines was employed to analyze the linkage between DNA markers and a new gene Wbph6(t) conferring resistance to whitebacked planthopper, Sogatella furcifera By using th... A rice population consisting of 90 TN1/Guiyigu F3 lines was employed to analyze the linkage between DNA markers and a new gene Wbph6(t) conferring resistance to whitebacked planthopper, Sogatella furcifera By using the mapping approach of bulked extremes and recessive class, Wbph6(t) was mapped onto the short arm of chromosome 11 with a genetic distance of 21.2 cM to SSLP marker RM167. 展开更多
关键词 gene mapping restriction fragment length polymorphism simple sequence length polymorphism Sogatella furcifera resistance to pest insect rice
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