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首页> 外文会议>Beltwide Cotton Conferences >Effects of defoliants alone and in combination with insecticides on boll weevil and whiteflies in cotton: C. effects on silverleaf whitefly
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Effects of defoliants alone and in combination with insecticides on boll weevil and whiteflies in cotton: C. effects on silverleaf whitefly

机译：单独的小血液和杀虫剂组合的影响棉花棉花和粉虱中的杀虫剂：C.对Silverleaf粉虱的影响

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摘要

Application of Def for defoliation of cotton in the field had little effects on the eggs, second and older instar nymphs of silverleaf whitefly, Bemisia argentifolii Bellows & Perring. However, application of Def significant reduced the survival rate (30 percent) of first instar nymphs compared with untreated control (70 percent). Def, in combination with two insecticides, Karate (a pyrethroid) and Guthion (an organophosphate) also decreased the survival rates of first, second and third instar nymphs. Almost all chemical treatments did not significantly affect the survival rate of fourth instar nymphs and pupae compared with untreated control. Although numbers of B. argentifolii adults caught on yellow sticky cards varied greatly among treatmentson different dates, the differences were generally not significant. However, numbers of parasitoids, Eretmacerus spp. and Encarsia spp., caught on yellow sticky cards were significantly fewer in the plots treated with Def, Def+Guthion and Def+Karate andin untreated control than those in the plots treated with Karate and Guthion alone.
机译：DEF在田地中脱落的应用对Silverleaf粉虱的鸡蛋，二年龄和旧龄少量影响较小，Bemisia Argentifolii Bellows＆Perring。然而，与未处理的对照（70％）相比，DEF的应用显着降低了第一龄若虫的存活率（30％）。 DEF，与两个杀虫剂组合，空手道（拟除虫菊酯）和牙磷酸（有机磷酸盐）也降低了第一，第二和第三龄若虫的存活率。与未经处理的对照相比，几乎所有化学处理都没有显着影响第四龄若虫和蛹的存活率。虽然B. Argentifolii成年人的数量在黄色粘滞卡上捕获的成年人在治疗中不同的日期变化很大，但差异一般不显着。然而，寄生素数量，Eretmacerus spp。 encarsia spp。，在用def，def + guthion和def +空手道处理的地块上捕获黄色粘性卡片的速度明显较少，而不是单独使用空手道和金甲酸的图中的图中的图中的控制。

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