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为了明确25%噻虫胺·高效氯氟氰菊酯微囊悬浮剂对温室白粉虱的防治效果,2013年以常用药剂25%噻虫嗪水分散粒剂和5%高效氯氟氰菊酯微乳剂为药剂对照,在夏春秋甘蓝上测定了25%噻虫胺·高效氯氟氰菊酯微囊悬浮剂2500倍液、2000倍液和1500倍液对温室白粉虱的田间防治效果。结果表明:在试验剂量条件下,25%噻虫胺·高效氯氟氰菊酯微囊悬浮剂对温室白粉虱具有较好的防治效果,且持效期长,对温室白粉虱的天敌种类和数量以及甘蓝生长等均无不良影响。其中,施用1500倍液防效最好,试验期内的防效始终>药剂对照,施药后第7 d防效为86.97%;施用2000倍液防效次之,除施药后第1 d外,其他时段的防效均>药剂对照且与施用1 500倍液防效差异不显著。生产上推荐25%噻虫胺·高效氯氟氰菊酯微囊悬浮剂施用浓度为2000~1500倍液,折合有效成分用量为93.75~112.5 g/hm2。
In order to clarify the control effect of 25% clothianidin and lambda-cyhalothrin microcapsule suspension on greenhouse whitefly, in 2013, we used microencapsulated 25% thiamethoxam and 5% lambda-cyhalothrin The pesticides were used as control. The control effect of 25% clothianidin / lambda-cyhalothrin microcapsule suspension 2500 times, 2000 times and 1500 times on the control of B. tabaci on greenhouse were determined in summer and autumn. The results showed that 25% clothianidin / lambda-cyhalothrin microcapsule suspension had better control effect on whitefly at the test dose, and had a long lasting effect on the natural enemies of whitefly Quantity and the growth of cabbage and other no adverse effects. Among them, 1500 times the best liquid control effect, the control effect of the test period is always> Pharmacy control, 7 d after spraying the control effect was 86.97%; 2000 times the control effect of the second, except after the first day of application In addition, the anti-efficacy in other time periods was> no significant difference between the control and the control efficacy of 1 500 times. Production recommended 25% clothianidin · Lambda-cyhalothrin microcapsule suspension concentration of 2000 to 1500 times the liquid, equivalent to an effective amount of 93.75 ~ 112.5 g / hm2.