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东方黏虫[Mythimna separata(Walker)]田间自然种群的性信息素受体MsepOR6功能鉴定 被引量:1
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作者 张永乐 程建军 +1 位作者 郑静君 杜永均 《浙江大学学报(农业与生命科学版)》 CAS CSCD 北大核心 2023年第2期149-158,共10页
为进一步理解东方黏虫[Mythimna separata(Walker)]的求偶行为,探明雄蛾对种内和种间性信息素的嗅觉分子识别机制,本研究以顺11-十六碳烯乙酸酯(Z11-16:Ac)和顺11-十六碳烯醇(Z11-16:OH)为性信息素进行田间诱捕到的东方黏虫作为研究对象... 为进一步理解东方黏虫[Mythimna separata(Walker)]的求偶行为,探明雄蛾对种内和种间性信息素的嗅觉分子识别机制,本研究以顺11-十六碳烯乙酸酯(Z11-16:Ac)和顺11-十六碳烯醇(Z11-16:OH)为性信息素进行田间诱捕到的东方黏虫作为研究对象,根据文献报道的MsepOR6基因片段序列,采用cDNA末端快速扩增(rapid amplification of cDNA ends,RACE)技术扩增出其全长,采用双电极电压钳技术鉴定MsepOR6对东方黏虫及其同作物生境害虫的性信息素的电流反应,并通过田间诱捕试验验证雄性东方黏虫对其中的活性化合物的行为反应。电生理测定结果表明:MsepOR6是东方黏虫雄蛾的性信息素受体基因,其cRNA对种内性信息素顺11-十六碳烯醛(Z11-16:Ald)、十六醛(16:Ald),以及种间性信息素顺9-十四碳烯乙酸酯(Z9-14:Ac)、顺7-十二碳烯乙酸酯(Z7-12:Ac)、顺9-十六碳烯乙酸酯(Z9-16:Ac)、顺9-十四碳烯醇(Z9-14:OH)有显著的电生理反应。田间生物测定结果表明,Z9-14:Ac可显著抑制东方黏虫性信息素的引诱活性,Z7-12:Ac则显著提高东方黏虫性信息素对雄蛾的引诱效果。本研究有助于理解东方黏虫的性信息素行为调控机制,为开发应用性信息素技术提供了理论支撑。 展开更多
关键词 东方黏虫 嗅觉受体 双电极电压钳 性信息素 种间化学通信
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胎儿脑积水诊断Walker-Warburg综合征一例
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作者 周佳妍 董海伟 史云芳 《国际生殖健康/计划生育杂志》 CAS 2024年第2期108-110,共3页
报道1例二次胎儿脑积水妊娠史的家系,采用单核苷酸多态性微阵列(single nucleotide polymorphism array,SNP array)分析及全外显子组测序(whole-exome sequencing,WES)分析其遗传学病因。SNP array未见胎儿染色体致病性及可能致病性拷... 报道1例二次胎儿脑积水妊娠史的家系,采用单核苷酸多态性微阵列(single nucleotide polymorphism array,SNP array)分析及全外显子组测序(whole-exome sequencing,WES)分析其遗传学病因。SNP array未见胎儿染色体致病性及可能致病性拷贝数变异。WES结果示胎儿POMT2基因的2号外显子存在一个遗传自父亲的可能致病性变异c.287A>G,POMT2基因的13号外显子存在一个遗传自母亲的致病性变异c.1362G>A。基因检测结果提示胎儿为POMT2基因复合杂合变异所致的Walker-Warburg综合征(Walker-Warburg syndrome,WWS)。对于反复胎儿脑积水且染色体未见致病性及可能致病性拷贝数变异的患者,可行家系WES检查以期找到遗传学病因,为再生育的遗传咨询及生育方式的选择提供依据。 展开更多
关键词 胎儿 脑积水 walker-Warburg综合征 POMT2基因 产前诊断
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不同季节印度洋Walker环流年代际变化的海温驱动因素研究
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作者 颜博琼 郑小童 +2 位作者 王浩 韩子文 张晏铭 《中国海洋大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第11期34-41,共8页
基于观测资料,本文研究了1900—2015年北半球不同季节影响印度洋沃克(Walker)环流年代际变化的关键海温异常和物理过程,发现在北半球冬季,热带东太平洋海温与热带北大西洋海温均对印度洋Walker环流的年代际变化有影响;在北半球夏季,印度... 基于观测资料,本文研究了1900—2015年北半球不同季节影响印度洋沃克(Walker)环流年代际变化的关键海温异常和物理过程,发现在北半球冬季,热带东太平洋海温与热带北大西洋海温均对印度洋Walker环流的年代际变化有影响;在北半球夏季,印度洋Walker环流的年代际变化仅与热带北大西洋海温相关。进一步研究发现,冬季与夏季影响印度洋Walker环流年代际变化的物理机制存在差异。在冬季,太平洋Walker环流与印度洋Walker环流紧密耦合,热带东太平洋海温负异常以及热带北大西洋海温正异常会通过调制大气对流异常,进而增强太平洋Walker环流,并通过跨海盆的“齿轮”效应加强印度洋Walker环流;而在夏季,太平洋Walker环流与印度洋Walker环流的耦合关系消失,取而代之的是热带北大西洋海温正异常通过加强其上空以及北非的对流活动,激发大气开尔文(Kelvin)波而削弱印度洋Walker环流。值得注意的是,冬季和夏季热带北大西洋都对印度洋Walker环流有影响,但效应刚好相反:冬季热带北大西洋增暖有利于印度洋Walker环流的增强,而夏季热带北大西洋增暖使印度洋Walker环流减弱。本文的研究结果为气候长期变化预测提供了理论参考。 展开更多
关键词 印度洋walker环流 太平洋walker环流 年代际变化 热带北大西洋 热带太平洋
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A Tri-mode of Mock-Walker Cells
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作者 Han QIN Ji NIE Zhiyong MENG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2024年第4期671-679,共9页
This work uses cloud-resolving simulations to study mock-Walker cells driven by a specified sea surface temperature(SST).The associated precipitation in the mock-Walker cells exhibits three different modes,including a... This work uses cloud-resolving simulations to study mock-Walker cells driven by a specified sea surface temperature(SST).The associated precipitation in the mock-Walker cells exhibits three different modes,including a single peak of precipitation over the SST maximum(mode 1),symmetric double peaks of precipitation straddling the SST maximum(mode 2),and a single peak of precipitation on one side of the SST maximum(mode 3).The three modes are caused by three distinct convective activity center migration traits.Analyses indicate that the virtual effect of water vapor plays an important role in differentiating the three modes.When the SST gradient is large,the virtual effect may be strong enough to overcome the temperature effect,generating a low-level low-pressure anomaly below the ascending branch of the Walker cell off the center.The results here highlight the importance of the virtual effect of water vapor and its interaction with convection and large-scale circulation in the Walker circulation. 展开更多
关键词 walker circulation cloud-resolving simulation virtual effect
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粘虫(Mythimna separata Walker)迁飞行为研究 被引量:15
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作者 王玉正 张孝羲 《生态学报》 CAS CSCD 北大核心 2001年第5期772-779,共8页
粘虫成虫期取食、飞翔、求偶或性反应交配和产卵一系列行为是各具相对独立性和顺序性的阶段。飞翔在取食、飞翔、求偶或性反应交配、产卵等期内都有发生 ,并有不同的飞翔特征 ,在迁飞中以飞翔期的飞翔最为重要。雌雄蛾的飞翔期在羽化后 ... 粘虫成虫期取食、飞翔、求偶或性反应交配和产卵一系列行为是各具相对独立性和顺序性的阶段。飞翔在取食、飞翔、求偶或性反应交配、产卵等期内都有发生 ,并有不同的飞翔特征 ,在迁飞中以飞翔期的飞翔最为重要。雌雄蛾的飞翔期在羽化后 3~ 1 0日龄 ,因求偶、性反应前期变化而有变异。粘虫雌蛾求偶前期 2~ 1 1 d,平均为 5.93d,雄蛾性反应前期 3~ 1 1 d,平均为 7.1 4 d。求偶、性反应与迁飞潜力有密切关系。随求偶、性反应前期加长 ,求偶、性反应前飞翔量呈“S"形曲线增长 ;求偶或性反应迟的个体有飞翔期 ,且有 1~ 2个飞翔峰 (日 )。根据有无飞翔期和求偶、性反应与飞翔量曲线确定雌蛾求偶前期大于 5d,雄蛾性反应前期大于 4 d的个体为迁飞型个体。自然种群中雌蛾迁飞型个体占 52 .4 7% ,雄蛾占97.1 4 % ;不同地理种群江苏、吉林、山东和广东 1~ 4代粘虫 ,雌蛾迁飞个体依次占 4 7.64%、4 9.2 9%、4 7.2 2 %和68.2 2 % ,求偶前期平均依次为 5.75、5.64、5.58和 6.77d。影响求偶前期的生态因素主要是温度逐渐上升和食料不断老化 ,两者可能是引起粘虫迁飞的主要因素。讨论了粘虫成虫期行为。 展开更多
关键词 粘虫 行为 迁飞 求偶前期 性反应前期 飞翔期
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东方粘虫(Pseudaletia separata(Walker))微卫星富集文库的构建与分析 被引量:6
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作者 张国彦 翟保平 《生态学报》 CAS CSCD 北大核心 2008年第8期3860-3867,共8页
根据生物素与链亲和素的强亲和性原理,用包被链亲和素的磁珠亲和捕捉与生物素标记的微卫星寡核苷酸探针(CA)15 (GA)15、(GTT)12、(GAT)12、(TAGA)3和(GTGA)。退火结合的含接头和微卫星序列的单链粘虫基因组DNA限制性酶切... 根据生物素与链亲和素的强亲和性原理,用包被链亲和素的磁珠亲和捕捉与生物素标记的微卫星寡核苷酸探针(CA)15 (GA)15、(GTT)12、(GAT)12、(TAGA)3和(GTGA)。退火结合的含接头和微卫星序列的单链粘虫基因组DNA限制性酶切片段,获得单链目的片段。经PCR扩增形成双链后连接到pGEM—T载体上,再转化到DH5α热感受态细胞中,首次成功构建粘虫基因组微卫星富集文库。随机抽样(16次抽样,每库共12—114个克隆)测序发现,6个文库总的微卫星阳性克隆率30.07%,CA/GAT/GTT等3个文库的阳性克隆率达到40%以上。单次抽样最高阳性克隆率达到56%。粘虫微卫星富集文库的建立和高多态性微卫星单拷贝位点的筛选将为粘虫的生态遗传学研究、连锁图谱构建、分子进化和系统发育研究等提供大量遗传标记,对昆虫迁飞的分子生态研究也有重大意义。 展开更多
关键词 东方粘虫 微卫星 富集文库 序列分析
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成人变异型Dandy-Walker综合征合并原发性脑膜黑色素瘤病的临床特点(附1例报告)
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作者 黄琳 余传勇 葛剑青 《临床神经病学杂志》 CAS 2023年第1期56-59,共4页
目的探讨成人变异型Dandy-Walker综合征(DWS)合并原发性脑膜黑色素瘤病的临床特点。方法回顾性分析1例成人变异型DWS合并有原发性脑膜黑色素瘤病的患者的临床资料。结果本例为19岁男性,出生后智能发育较同龄人迟缓,2018年开始反复出现... 目的探讨成人变异型Dandy-Walker综合征(DWS)合并原发性脑膜黑色素瘤病的临床特点。方法回顾性分析1例成人变异型DWS合并有原发性脑膜黑色素瘤病的患者的临床资料。结果本例为19岁男性,出生后智能发育较同龄人迟缓,2018年开始反复出现头痛、恶心、呕吐,1年后症状加重,行头颅MRI平扫示DWS变异型,行脑室腹腔分流术。术后1年出现精神行为异常,复查头颅MRI示软脑膜广泛伴脑内多个结节样异常信号,MRI增强示软脑膜广泛高信号伴结节样异常信号,腰穿CSF细胞学发现黑色素细胞。结论DWS与原发性脑膜黑色素瘤病可存在共病关系,二者之间的发病机制是否存在重叠目前尚缺乏相关证据。对于这两种疾病的治疗,目前国内外尚无规范化的治疗方案。 展开更多
关键词 DANDY-walker综合征 原发性脑膜黑色素瘤病 黑色素细胞
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Insecticide resistance of the field populations of oriental armyworm,Mythimna separata(Walker) in Shaanxi and Shanxi provinces of China 被引量:5
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作者 ZHAO Yu-yu SU Li +5 位作者 LI Shuai LI Yi-ping XU Xiang-li CHENG Wei-ning WANG Yi WU Jun-xiang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第7期1556-1562,共7页
Resistance of five field populations of Mythimna separata(Walker) collected from Shaanxi and Shanxi provinces of China to six different insecticides was evaluated by leaf dip method in the laboratory. The results sh... Resistance of five field populations of Mythimna separata(Walker) collected from Shaanxi and Shanxi provinces of China to six different insecticides was evaluated by leaf dip method in the laboratory. The results showed that all populations were relatively sensitive to emamectin benzoate with a resistance ratio(RR) of 0.583–1.583 folds. All populations showed susceptible or low level resistance to chlorantraniliprole and beta-cypermethrin. Compared with a relatively susceptible strain of M. separata, the resistance level of the whole populations ranged from susceptible to moderate to chlorpyrifos and lambda-cyhalothrin, moderate to high to phoxim(RR=19.367–70.100) except for population from Sanyuan County(RR=2.567). Pair-wise correlation analysis among different insecticides indicated that chlorpyrifos has a significantly positive and significant correlation with emamectin benzoate. Chlorantraniliprole didn't have significant correlation with emamectin benzoate, chlorpyrifos and phoxim. Therefore, emamectin benzoate, chlorantraniliprole and beta-cypermethrin are recommended to control oriental armyworm. Meanwhile, to postpone the occurrence and development of insecticide resistance in Shaanxi and Shanxi provinces, alternative and rotational application of insecticides between chlorantraniliprole and emamectin benzoate or chlorpyrifos is necessary. 展开更多
关键词 Mythimna separatawalker INSECTICIDES toxicity bioassay
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Effects of constant and stage-specific-alternating temperature on the survival, development and reproduction of the oriental armyworm, Mythimna separata(Walker)(Lepidoptera: Noctuidae) 被引量:3
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作者 LI Bo-liao XU Xiang-li +1 位作者 JI Jia-yue WU Jun-xiang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第7期1545-1555,共11页
Migratory insects make diverse adaptive strategies in response to changes in external environment. Temperature has an impact on the survival, development, reproduction, and migration initiation of insects. Previous re... Migratory insects make diverse adaptive strategies in response to changes in external environment. Temperature has an impact on the survival, development, reproduction, and migration initiation of insects. Previous research has primarily been focused on the effects of constant temperature on populations, but changing temperature has received less attention. Three constant temperature treatments(20, 25 and 30℃) and three pupal-alternating temperature treatments(20–25, 25–20 and 25–30℃) were set up to study the relationship between temperature and population development by age-stage, two-sex life table analysis in the oriental armyworm, Mythimna separata Walker, a notorious migratory pest in grain crops. The 25℃ treatment was considered optimal with 20 and 30℃ as low suitable temperature and high temperatures, respectively. The survival rate was relatively low before third instar larvae at 20℃(63.0%) and 20–25℃(70.1%), and extreme low after pupal stage at 30℃(20.6%). Developmental duration of each stage was negatively correlated with temperature. The adult preoviposition period, when most migratory insects initiate migration, was the shortest at 25℃(2.69d) but was lengthened at both low suitable(7.48d for 20℃, 6.91d for 25–20℃ and 4.57d for 20–25℃) and high temperatures(3.74d for 25–30℃ and 5.00d for 30℃). Both low suitable and high temperature decreased lifetime fecundity, net reproductive rate and the intrinsic rate of increase, with variability observed across developmental duration and stage during non-optimal temperature. The results expand knowledge of the relationship between changing temperature and armyworm population development, and adaptive strategies in complex ambient environment. 展开更多
关键词 Mythimna separata stage-specific-alternating temperature life table SURVIVAL REPRODUCTION
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Identification of summer nectar plants contributing to outbreaks of Mythimna separata(Walker)(Lepidoptera: Noctuidae) in North China 被引量:3
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作者 GUO Pei WANG Gao-ping +6 位作者 JIN Li-jie FAN Xing-qi HE Han-lin ZHOU Pei-wen GUO Xian-ru LI Wei-zheng YUAN Guo-hui 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第7期1516-1526,共11页
The presence of adequate nectar sources along the migratory pathway is a prerequisite for moths of oriental armyworm, Mythimna separata, to reach target habitats and lay eggs. Identification of plant species and asses... The presence of adequate nectar sources along the migratory pathway is a prerequisite for moths of oriental armyworm, Mythimna separata, to reach target habitats and lay eggs. Identification of plant species and assessment of their suitability as wild nectar sources along the summer migration pathway of adult M. separata are critical steps in making effective forecasts of second-and third-generation armyworm outbreaks in North China. We explored five aspects of moth-nectar source relationships:(1) Field investigations in 2014 and 2015 showed that the florescence of chaste tree, Vitex negundo var. heterophylla, a primary nectar plant in apiculture, coincided with the summer migration of oriental armyworm moths. The flowers of chaste tree opened day and night and M. separata moths were found actively flying around and resting on tree.(2) Identification of moth-borne pollen by scanning electronic microscopy(SEM) micrographs in 2015 and 2016 revealed that 15.4% of 369 moths trapped by blacklight traps, 17.1% of 557 moths captured by vertical-pointing searchlight traps and 24.4% of 311 moths caught by pheromone traps were found with pollen attached to their proboscis. A total of 228 pollen-carrying individuals out of 1237 armyworm moths were captured by the three types of traps. The three highest percentages of pollen-bearing armyworm moths were carrying pollen of Toona sp.(59.65%), Ligustrum sp.(27.19%) and Syringa sp.(4.39%). In total, 14 types of pollen were detected where three were identified to species, 10 to genus and one as an unknown species.(3) Analysis of geographical distribution, flowering periods and relative abundances of candidate nectar plants suggested that Chinese toon, Toona sinensis, and privet, Ligustrum lucidum, were two important nectar plant species.(4) Analysis on relationship between pollen and ovarian development showed that 14, 15 and 10 females carrying pollen of T. sinensis had ovaries at developmental stages Ⅰ, Ⅱ and Ⅲ, respectively. Many T. sinensis pollen grains were present on the proboscises of female moths.(5) Comparison of trap effectiveness between blacklight and vertical-pointing searchlight traps indicated blacklight traps caught the highest proportion(35.2%) of female in ovarian stage Ⅴ, whereas vertical-pointing searchlight traps caught the highest proportion(43.5%) of female in ovarian stage I with additional proportions of decreasing percentages for stages Ⅱ, Ⅲ and Ⅳ. Integrated analysis on these five aspects suggests that T. sinensis is an important, suitable summer nectar source that potentially influences migration and reproduction of M. separata moths andthus contributes to outbreaks of this pest. The vertical-pointing searchlight trap was the most effective tool for monitoring the migratory flight of adult M. separata. Privet, Ligustrum lucidum, and clove, Syringa sp., are possible suitable summer nectar plants that need further study to elucidate their importance. The reason why field investigation results on chaste tree differed from the results of moth-borne pollen analyses was discussed. 展开更多
关键词 Mythimna separata POLLEN ovarian development nectar plant
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Analysis on the migration of first-generation Mythimna separata(Walker) in China in 2013 被引量:3
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作者 ZHANG Zhi ZHANG Yun-hui +5 位作者 WANG Jian LIU Jie TANG Qing-bo LI Xiang-rui CHENG Deng-fa ZHU Xun 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第7期1527-1537,共11页
Mythimna separata(Walker) is an important pest which can cause serious damages to cereal crops. In the past two decades, several heavy outbreaks have taken place in northern China. In order to develop a fine-scale m... Mythimna separata(Walker) is an important pest which can cause serious damages to cereal crops. In the past two decades, several heavy outbreaks have taken place in northern China. In order to develop a fine-scale method of forecasting outbreaks, population data were collected in northern China using searchlight traps and ground light traps. A background weather pattern analysis and trajectory analysis were performed via the Weather Research and Forecast(WRF) and FLEXPART models. Our results showed that heavy migration of first-generation M. separata appeared in northern China in 2013. In Yanqing District, Beijing, the cumulative number of captured adults in searchlight traps was around 250000 and the daily maximum for trapped moths was 86000. During the peak period, the majority of M. separata moths arrived after 00:00 every night. The sex ratio(female:male) at each monitoring site was greater than 1 and greatly fluctuated with population dynamics. During the migration peak, prevailing downdraft winds benefited M. separata moths to land passively. Trajectory simulation showed that immigrants were from Anhui, Jiangsu and Hubei provinces and most of them could continue to fly into the northeastern regions of China. These results provide technical support for fine-scale forecasting of the outbreak of M. separata at meso-and micro-scale. 展开更多
关键词 Mythimna separata population dynamics migration trajectory
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Effects of alternating temperatures on development and reproduction of the armyworm,Mythimna separata (Walker) 被引量:2
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作者 Li Xiuzhen, Wu Kunjun Gong PeiyuInstitute of Zoology, Chinese Academy of Sciences, Beijing 100080, China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1993年第2期186-193,共8页
Effects of cycling and constant temperature on development and reproduction of the armyworm, Mythimna separata (Walker) were investigated by rearing the insects on the artificial diet under temperatures covering low(1... Effects of cycling and constant temperature on development and reproduction of the armyworm, Mythimna separata (Walker) were investigated by rearing the insects on the artificial diet under temperatures covering low(16-24℃ vs. 20 ℃ ), medial(20-28℃ vs. 24℃ ) and high(24-32 ℃ vs. 28 ℃) regions. In the low region, all the immature stages of the insect developed significantly faster under alternating temperatures than at corresponding constant temperatures. For the medial region, their development was little affected by variable temperatures. For the high region, developmental durations tended to be longer under cycling temperatures except egg stage.Mean fecundities of the adult moths markedly increased under cycling temperatures as compared with those at respective constant temperature in all regions.Possible reasons for effect of alternating temperatures on insect development are discussed in some details. 展开更多
关键词 alternating temperature armyworm (Mythimna separata) development duration population parameters fecundity.
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Effects of fluoride on growth and reproduction of the army worm, Mythimna separata (Walker) 被引量:1
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作者 Gong Peiyu, Li Xiuzhen, Wu Kunjun Shu Jianmin and Cao Hongfa Institute of Zookogy,Academia Sinica,Beijing 100080,ChinaInstitute of Zookogy,Chinese Research Academy of Environmental Science,Beijing 100012,China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1990年第4期45-50,共6页
This paper deals with effects of airborne fluorine on the army worm, Mythimna separata (Walker), by rearing the larvae on the wheat foliage exposed to HF or fumigating the larvae on the artificial diet with the pollut... This paper deals with effects of airborne fluorine on the army worm, Mythimna separata (Walker), by rearing the larvae on the wheat foliage exposed to HF or fumigating the larvae on the artificial diet with the pollutant. Larval relative growth rate (GR) and index of population trend of the insect reduced by 5% and 11%, respectively, when the larvae were reared on the foliage taken from the wheat plants exposed to 0.87 g·dm-2·day-1 of fluorine compared with those of the control. An extra instar appeared in a majority of the larvae treated. Survival rate and GR of the larvae on the wheat plant being exposure to the same concentration of fluorine in field open-top fumigation device were 40% and 15% lower than that of the control, respectively. Similar experiment with the insect on the artificial diet also showed that direct impact of the pollutant on the army worm was greater than its indirect effect via their host plant. 展开更多
关键词 air pollution FLUORIDE wheat plant army worm (Mythimna separata).
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Effects of temperature on population growth and intake of food by the army worm, Mythimna separata (Walker)
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作者 Li Xiuzhen, Wu Kunjun and Gong Peiyu Institute of Zoology,Academia Sinica,Beijing 100080,China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1990年第4期39-44,共6页
Population life tables of the army worm, Mythimna separata, were constructed and nutritional parameters of food for the larvae were examined at 5 temperatures from 16℃ to 32℃. The temperature suitable for growth and... Population life tables of the army worm, Mythimna separata, were constructed and nutritional parameters of food for the larvae were examined at 5 temperatures from 16℃ to 32℃. The temperature suitable for growth and reproduction of the insect ranged from 20℃ to 28℃ with the optimum of 24℃. Their survivalship and fecundity were much poorer at 32℃ than at 16℃. Indices of population trend of the insect at these temperatures could well fitted with the parabolic curve which theoretically indicated that the population density would multiply by some 660 after one generation circle at the optimal temperature, 22.6℃, and it would decline at temperatures higher than 32.9℃ or lower than 12.3℃. Larval food intake and their AD tended to go up while their ECI and ECD to go down with a rise in temperature. These alterations in population size and feeding behavior caused by temperature would exert an important effect on their damage to crops. 展开更多
关键词 TEMPERATURE army worm (Mythimna separata) life table nutritional parameters.
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Secondary effect of SO_2 pollution: enhanced growth of the army worm, Mythimna separata (Walker)
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作者 Wu Kunjun, Gong Peiyu, Li Xiuzhen, Shu Jianmin and Cao HongfaInstitute of Zookogy,Academia Sinica,Beijing 100080,ChinaInstitute of Zookogy,Chinese Research Academy of Environmental Science,Beijing 100012,China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1990年第4期51-60,共10页
Effects of SO2 pollution on growth of the army worm, Mythimna separata, were investigated by rearing the larvae for 12 days on the wheat plants being exposed to SO2 levels ranged from 50 to 200 ppb in the field open-t... Effects of SO2 pollution on growth of the army worm, Mythimna separata, were investigated by rearing the larvae for 12 days on the wheat plants being exposed to SO2 levels ranged from 50 to 200 ppb in the field open-top fumigation devices. Larval period shortened while their mean relative growth rate (MRGR) increased as SO2 dose elevated. Similar experiment with the insect on the artificial diet excluded the possibility that SO2 pollution directly stimulated growth of the army worm.The patterns of change in amino acid hydrolysates in the host foliage suggested that contents of methionine, and perhaps, arginine in food material exposed to unpolluted air were at such levels that they could only support sub-optimum growth of the insect, and SO2 pollution increased concentrations of these limiting amino acids, resulting in better performance of the larvae. 展开更多
关键词 environmental pollution SO2 wheat plant amino acids army worm (Mythimna separata).
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Regularity of population occurrence and migration in the oriental armyworm, Mythimna separata(Walker)
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作者 JIANG Xing-fu 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第7期1482-1484,共3页
The oriental armyworm,Mythimna separata(Walker)(Lepidoptera:Noctuidae),is a major migrant pest of grain in China and other Asian countries,causing huge crop production and economic losses nationwide annually.Much... The oriental armyworm,Mythimna separata(Walker)(Lepidoptera:Noctuidae),is a major migrant pest of grain in China and other Asian countries,causing huge crop production and economic losses nationwide annually.Much of the uniquely difficult aspects of managing M.separata arises from its long-distance migratory behavior.For example,direction and timing of winds from its overwintering regions in the south largely determine where and when large influxes of migrants arrive in the north to oviposit,making prediction of infestations difficult. 展开更多
关键词 Mythimna separata Regularity of population occurrence and migration in the oriental armyworm walker
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Dandy-Walker综合征患儿腹腔分流术前后临床与影像学特征分析 被引量:1
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作者 刘智强 陈金桃 +3 位作者 唐文龙 翁超群 张金锋 林志雄 《中国现代神经疾病杂志》 CAS 北大核心 2023年第5期433-438,共6页
目的 总结Dandy-Walker综合征患儿腹腔分流术前后临床与影像学特征。方法与结果 选择2016年1月至2023年1月福建三博福能脑科医院收治的共6例Dandy-Walker综合征患儿(包括Dandy-Walker畸形1例、Dandy-Walker变型5例),主要表现为小脑蚓部... 目的 总结Dandy-Walker综合征患儿腹腔分流术前后临床与影像学特征。方法与结果 选择2016年1月至2023年1月福建三博福能脑科医院收治的共6例Dandy-Walker综合征患儿(包括Dandy-Walker畸形1例、Dandy-Walker变型5例),主要表现为小脑蚓部缺损,小脑幕、窦汇区上移,第四脑室显著扩张,后颅窝囊性病变,幕上脑室扩张、积水(1例);或小脑蚓部发育不良,小脑半球受压,第四脑室扩张,后颅窝囊性病变,幕上脑室扩张、积水(5例)。分别行右侧侧脑室-腹腔分流术(2例)或后颅窝囊肿-腹腔分流术(4例),手术顺利,无手术相关并发症。随访2.31~7.00年,术后脑积水和后颅窝囊性畸形均逐渐减轻,3例预后良好,大脑半球和小脑发育良好,言语功能、运动功能、智力正常;3例预后一般,遗留轻度小脑平衡障碍(1例)或孤独症、幽闭恐惧症(1例),合并神经皮肤黑变病患儿遗留言语功能、运动功能、智力障碍(1例)。结论 表现为脑积水的Dandy-Walker综合征患儿经单分流术纠正脑积水后,大脑结构可获得良好发育,其中Dandy-Walker变型小脑蚓部良好发育,而Dandy-Walker畸形表现为小脑蚓部缺损时是否发育需更多病例观察。 展开更多
关键词 丹迪-沃克综合征 脑室腹膜分流术 磁共振成像 儿童
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应用Walker经典概念分析法界定老年人跌倒恐惧内涵
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作者 曹杏玲 孙丽萍 吴金球 《上海护理》 2023年第6期27-30,共4页
目的 通过概念分析法界定跌倒恐惧的概念内涵,为今后科学准确地评估老年人跌倒恐惧以及制订针对性的护理干预计划提供参考。方法 系统检索中国知网、万方、维普、PubMed、Web of Science等数据库从建库至2022年1月12日收录的有关跌倒恐... 目的 通过概念分析法界定跌倒恐惧的概念内涵,为今后科学准确地评估老年人跌倒恐惧以及制订针对性的护理干预计划提供参考。方法 系统检索中国知网、万方、维普、PubMed、Web of Science等数据库从建库至2022年1月12日收录的有关跌倒恐惧的相关文献,共纳入41篇文献。采用Walker等提出的经典概念分析法对文献中关于跌倒恐惧的概念内涵进行分析。结果 老年人跌倒恐惧的定义属性包括以下3个方面。①情绪状态:焦虑、担忧;②认知机制:对潜在威胁的主观估计和避免跌倒能力的现实评估;③行为元素:活动回避。结论 鉴于跌倒恐惧的高发生率和不良后果,临床医护人员应认识到跌倒恐惧的存在及其重要性,通过早期识别高风险人群构建并开展针对性的护理措施,以期降低老年人跌倒恐惧。 展开更多
关键词 walker经典概念分析法 跌倒恐惧 老年人 定义属性
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Monitoring Thosea sinensis Walker in Tea Plantations Based on UAV Multi- Spectral Image
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作者 Lin Yuan Qimeng Yu +3 位作者 Yao Zhang Xiaochang Wang Ouguan Xu Wenjing Li 《Phyton-International Journal of Experimental Botany》 SCIE 2023年第3期747-761,共15页
Thosea sinensis Walker(TSW)rapidly spreads and severely damages the tea plants.Therefore,finding a reliable operational method for identifying the TSW-damaged areas via remote sensing has been a focus of a research co... Thosea sinensis Walker(TSW)rapidly spreads and severely damages the tea plants.Therefore,finding a reliable operational method for identifying the TSW-damaged areas via remote sensing has been a focus of a research community.Such methods also enable us to calculate the precise application of pesticides and prevent the subsequent spread of the pests.In this work,based on the unmanned aerial vehicle(UAV)platform,five band images of multispectral red-edge camera were obtained and used for monitoring the TSW in tea plantations.By combining the minimum redundancy maximum relevance(mRMR)with the selected spectral features,a comprehensive spectral selection strategy was proposed.Then,based on the selected spectral features,three classic machine learning algorithms,including random forest(RF),support vector machine(SVM),and k-nearest neighbors(KNN)were used to construct the pest monitoring model and were evaluated and compared.The results showed that the strategy proposed in this work obtained ideal monitoring accuracy by only using the combination of a few optimized features(2 or 4).In order to differentiate the healthy and TSW-damaged areas(2-class model),the monitoring accuracies of all the three models were computed,which were above 96%.The RF model used the least number of features,including only SAVI and Bandred.In order to further discriminate the pest incidence levels(3-class model),the monitoring accuracies of all the three models were computed,which were above 80%,among which the RF algorithm based on SAVI,Band_(red),VARI__(green),and Band_(red_edge) features achieve the highest accuracy(OAA of 87%,and Kappa of 0.79).Considering the computational cost and model accuracy,this work recommends the RF model based on a few optimal feature combinations to monitor and distinguish the severity of TSW in tea plantations.According to the UAV remote sensing mapping results,the TSW infestation exhibited an aggregated distribution pattern.The spatial information of occurrence and severity can offer effective guidance for precise control of the pest.In addition,the relevant methods provide a reference for monitoring other leaf-eating pests,effectively improving the management level of plant protection in tea plantations,and guaranting the yield and quality of tea plantations. 展开更多
关键词 Unmanned aerial vehicle diseases and pests monitoring tea plant MULTISPECTRAL Thosea sinensis walker
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Efficacy of High-efficiency Formula Pesticides for Controlling Sesamia inferens Walker and Ceratovacuna lanigera Zehntner
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作者 Yongde MA Xiaoyan WANG +3 位作者 Yinhu LI Hongli SHAN Rongyue ZHANG Yingkun HUANG 《Agricultural Biotechnology》 CAS 2023年第2期42-44,47,共4页
[Objectives]This study was conducted to screen high-efficiency formula pesticides and precise and efficient application techniques for the prevention and control of Sesamia inferens Walker and Ceratovacuna lanigera Ze... [Objectives]This study was conducted to screen high-efficiency formula pesticides and precise and efficient application techniques for the prevention and control of Sesamia inferens Walker and Ceratovacuna lanigera Zehntner.[Methods]Field efficacy trials were conducted using different combinations of 70%directed enhanced thiamethoxam seed treatment dispersible powder and 46%monosultap·Bacillus thuringiensis wettable powder.[Results]70%directed enhanced thiamethoxam ZF 450 g/hm^(2)+46%monosultap·B.thuringiensis WP 2250 g/hm^(2)had good control effects on both S.inferens and C.lanigera,so it was an ideal high-efficiency formula pesticide for controlling sugarcane S.inferens and C.lanigera.From January to May,combining with new plant or perennial root cultivation management,70%directed enhanced thiamethoxam ZF 450 g/hm^(2)can be evenly spread on sugarcane ditches and sugarcane stumps after being well mixed with fertilizers applied per hectare,and covered with soil in a timely manner,and during the peak incubation period of the first and second generation of S.inferens eggs from March to May,46%monosultap·B.thuringiensis WP 2250 g/hm^(2)was sprayed to the leaf surface in the mixture with water 675 kg with an electric backpack or a motorized sprayer.In such a way,the control efficacy on dead heart seedlings could reach over 89.8%,and that on C.lanigera could reach 100%.Meanwhile,it could effectively and concurrently control thrips,and the increases in yield and sugar content could reach 29310 kg/hm^(2)and 5.9 percentage points,respectively.[Conclusions]The promotion and application of the formula pesticide could achieve precise application and control of sugarcane pests,and improvement of sugarcane quality and planting efficiency,and help promote green prevention and control of sugarcane diseases and pests and the sustained high-quality development of the sugar industry. 展开更多
关键词 SUGARCANE Efficient formula pesticide Accurate application of pesticides Sesamia inferens walker Ceratovacuna lanigera Zehntner Control efficacy evaluation
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