Dominant Natural Enemies of Sugarcane Pests and Their Protection and Utilization in Yunnan

This paper discussed and summarized the parasitic characters and the protection and utilization of 7 species of dominant natural enemies of sugarcane pests in Yunnan, China. Sugarcane pests are numerous and there are rich natural enemy resources in Yunnan sugarcane areas. There are more than 283 species of natural enemies against sugarcane pests in Yunnan, among which the dominant natural enemies with protection and utilization value and research significance include Trichogramma, Apanteles flavipes(Cameron) and Sturmiopsis inferens Townsend parasitic on sugarcane borers, Synonycha grandis(Thunberg), Lemnia biplagiata(Swartz), Chilomenes sexmaculata(Fabricius) and Thiallela sp catching and feeding on Ceratovacuna lanigera Zehntner, and Euborellia pallipes Shiraki preying on Saccharicocus sacchari(Cocherell), Dysmicoccus bohinsis Kuw, Trochorhopalus humeralis Chevrolat and Diocalandra sp. There is also one fungal parasite, namely Beauveria bassiana, which is widely distributed in nature, and can parasitize in a variety of sugarcane pests including sugarcane borers, Exolontha serrulata(Gyllenhal), Alissonotum impressicolle Arrow, T. humeralis and Otidognathus rubriceps Chevrola. It has a natural parasitism rate generally around 10% and certain natural inhibition effect on sugarcane pests. Reasonably protecting and utilizing natural enemies and giving full play to the natural regulation of natural enemies on pests are of great significance for protecting the ecological environment, maintaining the ecological balance of sugarcane fields, improving the comprehensive management level of pests, and promoting the sustainable development of sugar industry.

Screening of Natural Enemies of Monochamus alternatus Transmitting Pine Wood Nematode Disease

The screening of the natural enemies of Monochamus altematus Hope is the basic work for studying the biological control of pine wood nematode disease. The dead pine wood in different periods were anatomized and observed to collect the subcutaneous insects and the insects within pine wood. The insects that could not be determined as trunk-boring pests were fed with Monochamus alternatus Hope larvae. The parasitic natural enemies of Monochamus altematus Hope larvae, Dastarcus helcphoroides, and six kinds of feeding natural enemies of Monochamus altematus larvae were found. And Dastarcus helcphoroide was first found in Guizhou.

Potato/Maize intercropping reduces infestation of potato tuber moth, Phthorimaea operculella(Zeller) by the enhancement of natural enemies

The potato tuber moth(PTM),Phthorimaea operculella(Zeller),is one of the most economically significant insect pests for potato in both field and storage worldwide.To evaluate the infestation,reduction of potato yield and the control efficacy for PTM,field tests were conducted in two seasons by intercropping of potato as the host plant with maize as a non-host plant of PTM.Three intercropping patterns were tested,which were 2 rows of potatoes with either 2,3,or 4 rows of maize(abbreviated 2 P:2 M,2 P:3 M,and 2 P:4 M),and the monocropped potato as the control,2 rows of potatoes,without maize,(abbreviated 2 P:0 M).Results showed that the population and infestation of PTM in the 2 P:3 M intercropping pattern was significantly lower than those in 2 P:2 M,2 P:4 M and the monocropping pattern of 2 P:0 M,due to the enhancement of natural enemies.Cumulative mines and tunneling in potato leaves in 2 P:3 M intercropping were significantly lower than those in 2 P:2 M and 2 P:4 M patterns.The population of parasitoids and the parasitism rate of PTM in intercropping pattern of 2 P:3 M were significantly higher than that in intercropping pattern of 2 P:2 M,2 P:4 M and monocropping pattern of 2 P:0 M.We conclude that the potato intercropped with maize reduced the adult and larva populations,and reduced the damage from PTM by enhancing the number of parasitoids and the level of parasitism.The greatest population density of parasitoids and parasitism rate were in the intercropping pattern of 2 rows of potatoes with 3 rows of maize.These data indicate that the host/non-host intercropping patterns can be used as a biological control tactic against PTM by enhancing the density of natural enemies in the agro-ecosystems.

Comparative Efficacies of Next-Generation Insecticides Against Yellow Stem Borer and Their Effects on Natural Enemies in Rice Ecosystem

The efficacies of some next-generation insecticides against the rice yellow stem borer(YSB),Scirpophaga incertulas(Walk.), and their compatibilities with natural enemies were investigated during 2014 and 2015. Three newer insecticides, chlorantraniliprole 0.4% G, dinotefuran 20% SG, and methoxyfenozide 24% SC, and two commonly used insecticides, carbufuran 5 G and quinalphos 25 EC,were evaluated in the field for their efficacies against YSB and their non-target effects on natural enemies.Application of chlorantraniliprole 0.4% G at 10.96 kg/hm^2 resulted in the greatest reduction in YSB infestation(deadhearts and whiteheads) and greatest increase of yield compared to the untreated control plots, followed by methoxyfenozide 24% SC at 0.41 L/hm^2, dinotefuran 20% SG at 0.15 kg/hm^2,carbufuran 5 G at 10.96 kg/hm^2, and quinalphos 25 EC at 1.50 L/hm^2. All the insecticides reduced the numbers of predators viz., lady bird beetles, wolf spiders, carabid beetles, earwigs, green mirid bugs, and damselflies. Numbers of adults of the egg parasitoids Trichogramma sp., Telenomus sp. and Tetrastichus sp. were significantly reduced in insecticide-treated plots compared to untreated control plots. In all field trials, the harmful effects of the five insecticides were in the following rank order(least harmful to most harmful): chlorantraniliprole 0.4% G, carbufuran 5 G, dinotefuran 20% SG, methoxyfenozide 24% SC,and quinalphos 25 EC. On the basis of reduction in YSB infestation, increase in grain yield, and compatibility with natural enemies, chlorantraniliprole 0.4% G was proved to be the best of all the insecticides for YSB management system, although the study suggested minimizing its retail price for enhancement of cost effectiveness in farmers' fields.

Effects of Some Materials Extracted from Ajuga Species on the Larvae of Hyphantria cunea and its Natural Enemies

Six kinds of cxtracts drawn from Ajuga multiflora and .A. multliflora var. brevispicala and A. multiflora var.serotina using methanol and acetone were used in this experiment to test their killing activity to the second instar larvae ofHypantria cunea and their influence on its natural enemics. The average death rate caused by those extracts on the secondinstar larvae was 85.70%. The mortality rate caused by the extracts drawn with methanol was from 88.89% to 96.33%,which was significal1tly l1igl1er tl1a11 tl1at caused by acetol1e extracts. 'I11osc extracts were satt to TrchogranInIa `Ie)uI,xiIinIi,Coccinella septempunctata, the natural enelnies of H. cunea. We did not found any evidence shown that those extracts hadany influence the emergence and the devclopment of T. dendrolimi. Those methanolic extracts gotten from A. multiflora andA. multiflora var. brevispicata had no significant effects on the mortality of the larvae and adults of C. septenrpunctala.Those eXtracts could be used in the control of H cunea sattly.

The Effectiveness of Coccinellids as Natural Enemies of Aphids in Maize, Beans and Cowpeas Intercrop

A field study was conducted in Busia district of Kenya to elucidate the dynamics of ladybirds in mixed stands of maize, beans and cowpeas to determine their efficacy as sole control measures for Aphids. Maize, beans and cowpeas were intercropped using conventional husbandry practices and the general Coccinellid quantified as follows： Colonies of four Coccinellids, starved for 12 hours to enhance feeding on Aphids were assessed. The effects of weather on the abundance of Coccinellids were also investigated and involved collection of meteorological data from the Busia District Agricultural Office （BDAO） and from Busia Farmers Training Centre （BFTC） and relating them to the abundance and predation values. The predator population was most abundant in the mixed stands of maize and beans （2.33 predators/30 Aphids） as compared to their occurrence in pure stands of cowpeas （0.85 predators/30 Aphids）. The genus Cheilomenes spp. was the most ubiquitous predator with a mean of 4.00 individuals/30 Aphids while Hippodamia variegata was the least abundant predator species with a mean of 0.92 individuals/30 Aphids in all the agro-ecosystems. The larvae of Hippodamia variegata were the most bio-efficient, consuming 32.44 Aphids while their adults were the least bio-efficient, consuming 4.22 individuals for a period of 12 hours. The Coccinellids consumed more Aphids at higher aphid densities （24.05 Aphids） than at lower aphid densities （9.44 Aphids） over the same period of time. Rainfall and relative humidity had significant （F = 3.675; P 〈 0.05） effects on the abundance of Coccinellids. Temperature had significant （F = 3.58; P 〈 0.05） effect on the abundance of Coccinellids though at a lower level. Rainfall （r = -0.162） and relative humidity （r = - 0.084） were both inversely correlated with the abundance of Coccinellids. On the other hand, temperature was positively correlated （r = 0.159） with the prevalence of Coccinellids indicating that warmer and drier conditions favoured their multiplication.

Impact Analysis of Genetically Modified (Bt) Cotton Genotypes on Economically Important Natural Enemies under Field Conditions

Field studies were conducted at Hisar during Kharif, 2009-2010 and 2010-2011 under natural and unsprayed condition. RCH 134 Bt, HS 6 (non Bt), H 1117 and Ganganagar Ageti (non Bt) were selected for the studies. The experiment was laid down in Randomized Block Design replicated thrice having plant spacing 67.5 × 60 cm. Among the bollworms, Erias spp. exhibited positive correlation with rainfall, minimum temperature and relative humidity morning hours significantly at 5 percent level whereas Helicoverpa and Pectinophora displayed positive relations only with evening hours relative humidity significantly while Spodoptera were significantly positive correlated with relative humidity of morning and evening hours. Bollworm complex was negatively correlated with all the weather parameters employed to study although being non-significant in case of rainfall, maximum and minimum of temperature, morning and evening hours of relative humidity. Among the sucking pests, leafhoppers, whitefly, thrips and aphids population showed significantly negative correlation with weather parameters. The comparison of natural bio-agents in cotton hybrids under study revealed that overall mean population of natural enemies were higher in Bt cotton hybrid as compared to non-Bt. These results confirm that use of genetically modified (Bt) cotton in lieu of conventional genotypes could positively impact non-target and beneficial insect species by preserving their host populations.

Host plants and natural enemies of Bemisia tabaci （Hemiptera： Aleyrodidae）in China

The sweetpotato whitefly, Bemisia tabaci, has been a destructive pest in China for over the past two decades. It is an extremely polyphagous insect, being recorded feeding on hundreds of host plants around the world. Potential host plants and natural enemies of B. tabaci in the south, southeast, middle, north and northwest of China were investigated during the last decade. In total 361 plant species from 89 families were recorded in our surveys. Plants in the families Compositae, Cruciferae, Cucurbitaceae, Solanaceae and Leguminosae were the preferred host species for B. tabaci, which therefore suffered much damage from this devastating pest due to their high populations. In total, 56 species of parasitoids, 54 species of arthropod predators and seven species of entomopathogenic fungi were recorded in our surveys. Aphelinid parasitoids from Encarsia and Eretrnocerus genera, lady beetles and lacewings in Coleoptera and Neuroptera were found to be the dominant arthropod predators of B. tabaci in China. The varieties of host plant, their distribution and the dominant species of natural enemies of B. tabaci in different regions of China are discussed.

Natural Enemies of Calidea panaethiopica (Heteroptera: Scutelleridae): An Insect Pest of Jatropha curcas L. in the South-Sudanian Zone of Burkina Faso

Jatropha curcas L. is a non-edible oleaginous plant of Euphorbiacea family. Its seeds provide oil for industrial use, and when grown as a biofuel, J. curcas can be used to restore degraded soil by improving their fertility and by controlling water and wind erosion. The plant also reduces CO2 emission by carbon sequestration. However, J. curcas is attacked by many insect pests including C. panaethiopica, a polyphagous heteroptera of the Scutelleridae family. Larvae and adults of the insect pest feed on J. curcas flowers, fruit, and seeds, thereby causing quantitative and qualitative losses. Despite the economic importance of this insect pest, there is little known about its potential natural enemies. A survey of the natural enemies of C. panaethiopica was carried out from 3rd June 2013 to 29th May 2014 on three J. curcas production sites in the South-Sudanian zone of Burkina Faso. Three Hymenopteran egg parasitoids all belonging to the Scelionidae family were found. These included Trissolcus basalis (Wollaston), Psixstriaticeps (Dodd), and Gryon sp. Several predator species belonging to the Araneae, Tarachodidae and Mantidae families were also found. The egg parasitism increased progressively between June and September 2013, reaching a peak (43%) in September 2013. The number of spiders and mantises was higher between July and August 2013. The highest numbers of natural enemies associated with the insect pest were recorded in J. curcas monoculture plantations.

Analysis of Economic Benefits Brought by Industrialization of Natural Enemy Insects

In the field of biological control of agricultural and forestry pests,natural enemy insects play an important role,constituting the core of modern integrated pest management(IPM)strategy,providing solid support for the zero growth goal of chemical pesticide use,and helping the sustainable development of green agriculture.The rise of the natural enemy insect industry has become a key driver of the transformation of green agriculture,injecting vitality into the sustainability and ecological protection of agriculture.With the increasing concern about food safety,environmental protection and ecological balance all over the world,the application scope of natural enemy insects as biological control means is constantly expanding.Its unique ecological adaptability and environmentally friendly characteristics help to reduce dependence on chemical pesticides,ensure the safety of agricultural products and maintain ecological diversity.The purpose of this study is to analyze the current situation of natural enemy insect industry,evaluate its cost and benefit,emphasize its great significance in promoting the transformation of green agriculture,improving production efficiency and promoting ecological protection by drawing lessons from foreign successful experiences,and explore an efficient and sustainable new agricultural development model.

NATURAL ADJUSTMENT OF POPULATION DENSITY OF LARCH CASEBEARER(COLEOPHORA DAHURICA)

Population increase of Larch casebearer(C. dahurica)were controlled by compre-hensive factors.Spring wind caused 27％ of larvae on crown to fa11 down.Early and late frosts,larch catempillar,sawfly and needle cast of larch could reduce the food quality and quantity of larchcasebearer and had indrect effects on population density. Birds,ants and spites were the mainpredators of C.dahurica. The parasite complex comprised Piermalebae,Eulophidae,Ichneumonidaeand Braconidae."Self--adjustment",of population caused by"self--population density",only runseffectively at a high larval density.

A Mechanism for Biological Control-Tempo-Spatial Synchronization of Natural Enemy and Insect Pest Population Dynamics at the Peak by Increase of Biodiversity

To reveal the mechanism of control of the Woolly Apple Aphid （Eriosoma lanigerum Hausm, WAA） by increase of biodiversity in the apple orchard, a consecutive two-year field trials were conducted in Yurman province, China. The results showed that the peak of natural enemy density curve in the cover cropping orchard was well temporally synchronized with that of the WAA density on trees, but did not synchronize with that of WAA density on trees in clean orchard. In addition, the frequency of natural enemies and WAA within a same sample in cover cropping orchard was obviously higher than that in clean cultivated orchard during the peak of population curves, indicating that natural enemies spatially synchronized with aphids. The density of WAA for the whole growing season in cover cropping orchard was much less than that in clean orchard. Therefore, the temporal-spatial synchrony of natural enemy and aphid populations was proposed as one of the mechanisms for aphid control in cover cropped orchards.

云南番茄潜叶蛾捕食性天敌资源调查及其控害作用分子检测

云南省是番茄潜叶蛾Tuta absoluta(Meyrick)较早入侵的区域,为明确本地潜在自然天敌资源及其对番茄潜叶蛾的控制作用,采用田间调查、样本采集以及与室内分子检测相结合的技术方法,于7—10月对云南省10个地级州市主要番茄种植区的番茄潜叶蛾天敌资源进行调查,对采集的天敌种类进行DNA条形码鉴定,对其控害作用进行种特异性分子检测。结果表明,在番茄田共计采集到捕食性天敌36种,隶属2纲5目16科。进一步的分子检测结果显示,对番茄潜叶蛾具有控害作用的捕食性自然天敌19种,隶属2纲3目12科;其中,昆虫纲8种、蜘蛛纲11种;对番茄潜叶蛾控害作用阳性检出率为5.7%~100.0%。分布范围最为广泛的天敌为半翅目盲蝽科的烟盲蝽Nesidiocoris tenuis Reuter,在8个州市有分布;其次为花蝽科的黑翅小花蝽Oirus agilis(Flor)和小花蝽Orius sp.以及瓢虫科的七星瓢虫Coccinella septempunctata L.,分别在5个、4个和5个州市有分布;再次为蜘蛛目狼蛛科的拟环纹豹蛛Pardosa pseudoannulata(Böesenberg et Strand),在3个州市有分布;而其余的14个物种仅在1个或2个州市有分布。番茄潜叶蛾天敌资源最为丰富的区域为昭通市,有8种天敌;其次为丽江市和玉溪市,分别有6种和5种天敌;再次昆明市和曲靖市,分别有4种和3种天敌;而大理州、文山市、红河州有2种天敌,楚雄市和普洱市只有1种天敌。综合评价分析结果显示,控害潜力最大的为烟盲蝽,其次为黑翅小花蝽;此外,七星瓢虫和拟环纹豹蛛也表现了较好的控害能力。番茄潜叶蛾在西南虽发生为害较为严重,但对该种害虫具有控制作用的天敌种类也比较多,为利用本地天敌防治番茄潜叶蛾提供了自然资源保障。

New Evidence for the Hypothesis of Reducing Natural Enemy Pressure of Eupatorium adenophorum: Solenopsis invicta Competing with Doxrylus orientalis to Feed on E. adenophorum

Natural enemy insects are important factors in regulating plant invasion. The interactions between multiple insect species resulting from invasive plants remain poorly understood despite their potential. We observed notorious invasive plants Eupatorium adenophorum Sprengel were competedly fed by Solenopsis invicta Buren (Hymenoptera: Formicidae) and Dorylus orientalis Westwood (Hymenoptera: Formicidae) beside the scientific research base of Kunming University. It was first observed that D. orientalis was eating the epidermis, cortex, phloem and other root and stem tissues of E. adenophorum in soil. Two months later, it was observed that S. invicta ate the epidermis, cortex, phloem and other aboveground stem tissues of E. adenophorum. S. invicta attacked D. orientalis and displaced their living space by causing the later dead, injured, or even disabled. This phenomenon suggested that local herbivorous insects have adapted to E. adenophorum well, which will intensify the naturalization process of E. adenophorum in local habitats. In a homogeneous garden planting experiment of E. adenophorum conducted at the experimental base of Kunming University, the biomass of the introduced (China) populations of E. adenophorum was lower than that of the native (Mexico) populations, although there was no statistically significant difference. These results indicate a possible positive correlation between the increase in natural enemy pressure and the decrease in fitness of E. adenophorum.

蠖蛛比对游猎蛛种间竞争作用的影响

为明确茶尺蠖与天敌比值对天敌竞争作用的影响,得出优势种天敌,以期为茶尺蠖的生物防治提供有效依据,利用灰色关联度分析法、竞争系数分析法、竞争强度指数法、方差分析法和t检验法对安吉白茶、龙井43、平阳特早和农抗早4个茶园中茶尺蠖高峰日时的7种蜘蛛天敌取食茶尺蠖的竞争作用进行分析。灰色关联度分析结果表明,粽管巢蛛、黑色跳蛛和三突花蟹蛛是与茶尺蠖数量关系最为密切的前3位天敌;竞争系数分析结果表明鞍型花蟹蛛和斜纹猫蛛是竞争强度受比值影响最大的2种天敌;竞争强度指数分析结果表明鞍型花蟹蛛、三突花蟹蛛和斜纹猫蛛是竞争强度受比值影响最大的3种天敌。综合上述分析得出鞍型花蟹蛛和斜纹猫蛛是竞争能力受蠖蛛比影响较强的2种天敌,因此在茶尺蠖的防治过程中可根据害虫与天敌比值的高低分别加强对这2种天敌的保护与利用。研究结果可为合理保护与利用茶尺蠖天敌提供科学依据。

滨海稻区节肢动物天敌种类调查分析

为明确滨海稻区天敌情况,2021~2023年,于滨海稻区调查了水稻节肢类捕食性天敌的种类,结果表明,滨海稻区共捕获水稻节肢类捕食性天敌57种,隶属5目,21科。其中蜘蛛目12科,43种;蜻蜓目1科,2种;脉翅目1科,3种;半翅目3科,3种;鞘翅目4科,7种,以期为稻田害虫生物防治提供科学数据。

蜾蠃亚科物种的筑巢生物学研究现状

蜾蠃(Eumeninae)是胡蜂科(Vespidae)中种类最丰富的一个亚科,已知204属3800种,分布广泛、筑巢策略多样,其生活方式从绝大多数独居到极少数种类的原始社会性,对研究社会性昆虫演化具有重要价值。繁殖期筑巢是蜾蠃亚科物种生活史的重要阶段,也是子代繁殖成功的重要保障。按照其筑巢习性传统上可将蜾蠃亚科物种分为挖掘型、租住型和建造型3种类型。然而,蜾蠃亚科物种的筑巢在同种雌性中也具有很强的可塑性和建造不同类型的巢的习性。不论采用何种筑巢类型,蜾蠃亚科常用泥筑巢,也有一些种类用嚼碎的叶子或碎石子筑巢,甚至有少数种类会用植物材料或鸟粪等伪装巢。食物供应是蜾蠃筑巢过程中最大的精力和时间投资。大多数独居的蜾蠃是截断式为子代巢室内供应食物(将瘫痪的昆虫猎物作为幼虫的食物),一些具有原始社会行为的蜾蠃是渐进式供应,尤其是在猎物稀缺的情况下表现更明显。蜾蠃亚科主要捕猎鳞翅目(Lepidoptera)[尺蛾科(Geometridae)和卷蛾科(Tortricidae)]和鞘翅目(Coleoptera)[叶甲科(Chrysomelidae)和象鼻甲科(Curculionidae)]科幼虫,在农业重要鳞翅目和鞘翅目害虫的生物防治中具有重要作用。尽管蜾蠃亚科如此重要,但其筑巢生物学仍然鲜为人知,我国有关蜾蠃亚科物种的筑巢生物学研究更少。因此,本文系统综述了目前蜾蠃亚科筑巢生物学的研究现状,并提出未来研究建议如下:(1)研究蜾蠃亚科物种在不同生境中的筑巢生物学特点;(2)研究植物-植食性害虫-蜾蠃-天敌昆虫之间的食物网关系,进而揭示不同蜾蠃在农业和自然生态系统的功能;(3)优势蜾蠃在害虫生态防控中的应用研究。

宁陵县酥梨节肢动物多样性及主要害虫发生规律研究

【目的】为酥梨害虫的科学防治提供依据。【方法】选取盛果期代表性梨园,分别对梨园内的害虫及其天敌种群、数量进行调查,对主要害虫及天敌在酥梨不同生长季节的发生动态进行分析。【结果】通过网捕、灯诱、性诱、黄板引诱等方法调查宁陵县酥梨梨园内生物种群多样性,结果表明害虫种群共分为8目31种,天敌有8目27种,梨园内生物多样性丰富;应用相对丰富度、优势集中指数、多样性指数、均匀度指数、丰富度指数分析生物多样性状况,结果表明害虫优势种群为梨二叉蚜、梨小食心虫和梨木虱;分析了梨小食心虫和梨木虱的种群发生动态。【结论】实践中应在传统病虫害防治的基础上,充分挖掘天敌对害虫的控制潜能,合理地保护和利用自然天敌。

基于结构方程模型分析天敌因子对麦蚜种群动态的影响

在麦蚜生态系统中,天敌因子是蚜虫种群数量增长的重要抑制因子,不同天敌种群对麦蚜种群动态的影响不同且综合作用关系复杂.通过构建结构方程模型,刻画了多个天敌种群综合作用下麦蚜种群状态的变化规律;再通过验证性因子分析,检验和拟合所构建的模型,分析多个天敌种群对麦蚜种群的综合影响并给出优势天敌种群,为科学防治虫害提供了理论依据.

带药移栽对水稻害虫防控的减药增效作用分析

【目的】以新型、高效、持效期长的杀虫剂三氟苯嘧啶和四唑虫酰胺为例,探究带药移栽对水稻害虫的防控效果及农药减量增效的实践意义。【方法】通过室内模拟秧苗带药移栽分别测定了1.95,5.85和9.75 mg a.i./m^(2)三氟苯嘧啶处理对褐飞虱Nilaparvata lugens和白背飞虱Sogatella furcifera成虫或若虫的毒力和持效期,并在浙江杭州和湖南衡阳两地评估了早、中、晚稻秧苗高剂量带药移栽处理对二化螟Chilo suppressalis和稻飞虱的田间防效以及不同施药模式对稻田寄生蜂种群动态的影响。【结果】室内经5.85和9.75 mg a.i./m^(2)三氟苯嘧啶处理的秧苗在移栽后35 d时使褐飞虱雌成虫和3龄若虫均能保持75%以上的校正死亡率,且5.85 mg a.i./m^(2)剂量处理在移栽后28 d时使白背飞虱雌成虫的校正死亡率大于80%;使用12.75和25.50 mg a.i./m^(2)四唑虫酰胺处理秧苗在移栽后35 d时对早稻二化螟为害的校正防效均在85%以上。综合浙江杭州和湖南衡阳两地中、晚稻田间试验结果表明,应用5.85 mg a.i./m^(2)三氟苯嘧啶和25.50 mg a.i./m^(2)四唑虫酰胺进行秧苗“送嫁药”处理可减少1~2次大田用药和98%以上的农药有效成分用量,同时还保持着与常规喷施相当的防效,并使寄生蜂总种类和总数量分别提高了29.0%~49.7%和61.2%~69.3%。【结论】秧苗移栽前施用防效优良且持效期长的杀虫剂能减少水稻前期的施药次数和用量,产生较好的经济和生态效益。本研究为利用带药移栽技术推行水稻病虫害的绿色防控提供了重要参考。