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苹果园3种害螨对7种杀螨剂敏感性鉴定 总被引:4,自引:1,他引:4
苹果全爪螨(Panonychus ulmi Koch)和山楂叶螨(Tetranychus viennensis Zacher)是我国苹果树上普遍发生的重要害螨,二斑叶螨(Tetranychus urticae Koch)则是近年来在北方苹果产区发生的危险性害螨[1].目前很多果园3种害螨混合发生,而且3种害螨对各种杀螨剂的敏感程度差异较大,因此,有必要明确3种害螨对常用杀螨剂的敏感性,以便指导生产上合理使用农药,2000~2001年,作者选用7种果园常用杀螨剂对3种害螨进行了毒力测定. 相似文献
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自从使用有机磷杀虫剂防治害螨以来,山楂叶螨对药剂抗性问题,给防治带来很大困难.到八十年代初开始使用三氯杀螨醇等选择性杀螨剂,但最近1—2年果农又反映防治效果明显下降。有的苹果产区推广使用双甲脒等杀螨剂,效果究竟如何,为了澄清这些问题,选择高效杀螨剂并合理应用,延缓害螨产生抗性,我们进行了三种杀螨剂对山楂叶螨敏感种群的毒力测定。 材料和方法 供试虫源供试山楂叶螨越冬雌成螨的采集园片,1984年以前一直用对硫磷和内吸磷等有机磷杀虫剂,仅在1985年喷过两次三氯杀螨醇乳油。因此,可作为三氯杀螨醇的相对敏感种群。该种群从未接触… 相似文献
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二斑叶螨是近年来危害苹果、梨等果树的新害螨。它发生世代多、繁殖力强,对现有大部分杀螨剂有抗性,已成为果树叶螨的优势种群。1 形态特征 雌成螨卵圆形,大小与山楂叶螨相近,体色乳黄色或黄绿色,越冬型为橙黄色,体背两侧各有一块明 相似文献
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二斑叶螨和苹果全爪螨对药剂敏感性比较试验 总被引:5,自引:0,他引:5
苹果全瓜螨一直是北方苹果园的重要害螨,二斑叶螨近年来也迅速蔓延。在害螨的防治中,由于长年大量、频繁地使用化学农药.致使许多药剂防效下降或害螨已产生严重的抗药性。本文通过室内杀螨剂对二斑叶螨和苹果全爪螨的毒力测定,比较2种叶螨对药剂敏感性差异,对吝螨的防治具有一定的指导意义。1材料与方法 (1)试虫苹果全爪螨,采自泰山普照寺果园;二斑叶螨,采自岱岳区满庄镇菜园, (2)供试药剂1%齐墩螨素乳油;15%哒螨灵乳油;20%甲氰菊酯乳油;20%三氯杀螨醉乳油;57%克螨特乳油;20%双甲眯乳油;15%三哇… 相似文献
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N. J. Bostanian C. Vincent 《The Journal of Horticultural Science and Biotechnology》2013,88(4):459-463
SummarySeveral acaricides were evaluated for their effect on the European red mite, Panonychus ulmi Koch, and the apple rust mite, Aculus schlechtendali (Nalepa) in an experimental apple orchard. Fenbutatin oxide and cyhexatin were the most effective among the registered products. BAY SLJ 0312, which is a benzenamine compound, and clofentezine were the best among the new compounds. Early season activity of these two compounds against phytophagous mites makes them ideal candidates for development as ecologically selective acaricides for use in apple orchards. 相似文献
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七种药剂对朱砂叶螨室内毒力测定及田间药效试验 总被引:1,自引:0,他引:1
用7种药剂对蔬菜上朱砂叶螨的室内毒力和田间药效进行测定。结果表明:7种药剂中杀螨活性最高的是抗生素类-阿维菌素和甲氨基阿维菌素苯甲酸盐,24h时LC50分别为0.1300和0.7118mg/L;唑螨酯和哒螨灵的效果次之,LC50分别为1.4808和3.1586mg/L;螺螨酯的敏感性最低,24h时LC50为1 181.4348mg/L;田间试验结果表明:1.8%阿维菌素乳油、1%甲氨基阿维菌素苯甲酸盐乳油和15%哒螨灵乳油对朱砂叶螨的防效都非常好,2d的防效均达98%以上,14d的防效为100%。40%炔螨特乳油和5%唑螨酯悬浮剂在药后7和14d的防效达99%以上;240g/L螺螨酯悬浮剂表现出速效性稍低,持效性良好,药后14d防效为99.94%。 相似文献
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P. Nihoul G. Van Impe T. Hance 《The Journal of Horticultural Science and Biotechnology》2013,88(5):643-648
Indices of damage caused by the two-spotted spider mite (Tetranychus urticae) on tomato are described to provide information for biological control using the predator mite Phyto- seiulus persimilis. Degrees of a scale of 1-5 for damage to leaflet and leaf, which when integrated to the plant can distinguish fifty classes of damage (0.0-5.0), are characterized by a number of mites and by a population structure. Scores of 3 for leaflet and leaf damage reveal 99-95% adult females and eggs, marking the end of the colonization phase. The further development of foliage damage to a score of 4 corresponds to the activity of new migrating forms (27-21%) emerging from the important egg sub-population. A plant with a damage degree of 2.0 and 2.5 has 14% and 50% respectively of its ten upper leaves presenting a damage degree of 3 and supporting 6,500 and 15,500 spider mites respectively. These scores seem to be the maximum tolerable levels. Leaves damaged at score 4 appear on plants classified at a mean leaf damage index of 2.8 and supporting 23,100 spider mites. 相似文献
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综述了近年来在东北地区发生的甜菜茎象甲、叶螨和双斑萤叶甲3种甜菜害虫的形态特征、生活史、习性及防治方法。 相似文献