拉哥钝绥螨对荔枝瘤瘿螨的功能和数值反应

研究了拉哥钝绥螨捕食荔枝瘤瘿螨的功能反应和数值反应,进行了拉哥钝绥螨雌成螨捕食量与猎物荔枝瘤瘿螨密度、捕食量与拉哥钝绥螨自身密度之间、拉哥钝绥螨雌成螨产卵量与荔枝瘤瘿螨密度之间、拉哥钝绥螨发育历期与捕食量等成对便量之间的关系的试验。结果表明：在一定的猎物密度范围内,随着猎物密度的增长,拉哥钝绥螨成螨捕食量逐渐增加,两者之间有密切的相关性。在室温为25℃、相对湿度为80％～85％的实验条件下,其对荔枝瘤瘿螨成螨的日捕食量上限为37头;当猎物密度不变时,拉哥钝绥螨随着自身密度的增加,个体的捕食量减少;当猎物密度在一定范围内逐渐增大时,其平均产卵量也相应增加,而其发育历期则随捕食猎物量在一定范围内逐渐增大而相应缩短。     

胡瓜钝绥螨研究进展

综述20世纪70年代以来国内外对胡瓜钝绥螨分类地位、分布、生物学特性、大规模饲养和应用的相关研究,为今后应用研究提供科学依据。     

益害比及花粉存在对江原钝绥螨和柑橘全爪螨种群动态的影响

研究了在以不同益害比释放江原钝绥螨的情况下,益害比及花粉存在对江原钝绥螨捕食效果的影响.结果表明,当柑橘全爪螨平均每片叶低于5头时,按益害比1:10和1:20的比例释放江原钝绥螨,当平均每片叶柑橘全爪螨多于5头时,按益害比1:5释放江原钝绥螨,可将柑橘全爪螨数量控制在经济阈值以下.花粉的存在能减缓猎物密度下降对江原钝绥...     

4种杀虫剂对胡瓜钝绥螨成螨的急性毒性

测定了4种常用杀虫剂针对目标害虫推荐使用浓度范围对天敌胡瓜钝绥螨Neoseiulus cu-cumeris成螨的毒力测定、综合急性毒性和二次中毒毒性。综合急性毒性和二次中毒毒性测定结果显示,毒死蜱Chlorphifos、灭幼脲Chlorbenzurin、吡虫啉Imidacloprid对胡瓜钝绥螨都具有极强的毒性,可造成毁灭性杀伤,苏云金杆菌Bt对胡瓜钝绥螨影响极小,无明显毒性。玻片浸渍法测定的不同杀虫剂对胡瓜钝绥螨的毒力大小依次为:毒死蜱Chlorphifos(乐斯本)>灭幼脲Chlorbenzurin>吡虫啉Imidacloprid>苏云金杆菌Bt。     

The efficacy of spinosad against the western flower thrips, Frankliniella occidentalis, and its impact on associated biological control agents on greenhouse cucumbers in southern Ontario

Insecticides are the most commonly used tactic to control western flower thrips (WFT), Frankliniella occidentalis Pergande (Thysanoptera: Thripidae), on greenhouse cucumber. However, WFT has developed resistance to several of the insecticides presently in use. In addition, some of these insecticides adversely affect greenhouse biological control agents used to control WFT, resulting in subsequent pest resurgence. Therefore, there is a need to identify novel insecticides with unique modes of action for use in integrated pest management (IPM) programs to effectively control WFT with minimal impact on associated biological control agents. In laboratory bioassays conducted in 2001, immature and adult WFT and three associated greenhouse biological control agents: Amblyseius cucumeris Oudemans (Acarina: Phytoseiidae), Orius insidiosus Say (Hemiptera: Anthocoridae) and Encarsia formosa Gahan (Hymenoptera: Aphelinidae) were exposed to direct, direct/residual, and residual contact applications of the novel biopesticide, spinosad (Conserve 120 SC), and the industry standard for whitefly control, endosulfan (Thiodan 50 WP). In all three types of assay, spinosad was effective against immature and adult WFT life stages. It showed low toxicity to A. cucumeris, moderate toxicity to O. insidiosus and high toxicity to E formosa. Greenhouse studies involving exposure of immature and adult WFT and adult biological control agents to cucumber leaves sprayed previously with spinosad supported the laboratory data. Spinosad showed low toxicity to A. cucumeris exposed to leaves 1 day after treatment (DAT), moderate toxicity to O. insidiosus 1 and 8 DAT, and high toxicity to E. formosa up to 28 DAT. These data, along with spinosad's unique mode of action, suggest it would be a valuable reduced-risk control agent for greenhouse cucumber IPM programs.     

虚伪钝绥螨的食性研究

在26℃恒温、相对湿度75％的条件下,虚伪钝绥螨取食朱砂叶螨、山楂叶螨和苹果叶螨的发育历期分别为6.08、6.68、6.54天,一生产卵总量分别为47.52、48.75、48.12粒。上述食料对虚伪钝绥螨的发育和生殖无明显差别。通过对22种植物花粉的筛选,证明其中18种花粉可使虚伪钝绥螨完成发育,12种可以使其产卵,而以苹果、桃的花粉最能满足虚伪钝绥螨的生育要求,如进一步明确这两种花粉对虚伪钝绥螨的后代生育能力无不良影响,就有可能用花粉来取代叶螨,在室内大量繁殖。     

胡瓜钝绥螨控制大棚甜椒烟粉虱的研究

在我国山东省寿光市的蔬菜基地开展利用胡瓜钝绥螨控制日光大棚甜椒烟粉虱的研究.结果表明:(1)胡瓜钝绥螨能够捕食烟粉虱卵、成虫、若虫和伪蛹.在(25±1)℃、(30±1)℃、(35±1)℃下胡瓜钝绥螨以烟粉虱为猎物的发育历期与其取食柑橘全爪螨Panonychus citri(Mc Gregor)和二斑叶螨Tetranyc...     

胡瓜钝绥螨室内种群生命表研究

研究观察了以皮氏叶螨为食物时胡瓜钝绥螨的发育和繁殖情况,建立了室内种群生命表,以期为海南省儋州市引进该螨进行繁殖和应用提供科学依据。试验结果表明,24～28℃为胡瓜钝绥螨种群增长的最适温度,30℃以上的高温对其发育、存活和繁殖具有抑制作用。根据海南儋州地区的气候特点和皮氏叶螨危害作物的微生态环境,可以考虑将该螨作为皮氏叶螨捕食性天敌加以引进和应用。     

芦笋蓟马密度对巴氏钝绥螨生长发育和生殖的影响

在温度为25℃的室内条件下,研究了芦笋蓟马Thrips tabaci Lindeman 1龄若虫不同密度对巴氏钝绥螨Amblyseiusbarkeri Hughes生长发育和生殖的影响。结果表明:当猎物密度为3头时,巴氏钝绥螨的若螨历期最长,单雌日均产卵量最少,产卵持续时间最长。但总产卵量在各猎物密度处理间差异不显著。每日供给6头以上的芦笋蓟马1龄若虫即可满足巴氏钝绥螨生长发育和生殖的需要。