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Relationship between esterase activities of the cotton aphid (Aphis gossypii) and overwintering host plants
Author(s): 
Pages: 304-310
Year: Issue:  3
Journal: ACTA ENTOMOLOGICA SINICA

Keyword:  棉蚜酯酶寄主植物有机磷杀虫剂抗药性;
Abstract: 通过测定不同越冬寄主植物棉蚜Aphis gossypii种群α-乙酸萘酯(α-NA)酯酶的活力,结果表明:山东高密棉田棉蚜种群酯酶活力是北京花椒棉蚜酯酶活力的2.4倍,石榴、木槿上棉蚜酯酶活力是花椒棉蚜酯酶活力的1.3~1.5倍.不同寄主植物棉蚜α-NA酯酶和β-NA酯酶的频率分布表明:鼠李、花椒棉蚜的α-NA酯酶频率分布范围较集中,酯酶活力(每0.033头蚜虫的OD值)小于0.10时的频率分别为70%和62%,其个体累积率达50%时的酯酶活性(EF50)分别为0.08和0.085(每0.033头蚜虫的OD值);石榴、木槿和棉苗上α-NA酯酶频率分别为25%、31%和45%,其EF50分别为0.154、0.1368和0.1138,酯酶活力明显比鼠李和花椒棉蚜高;高密棉蚜为4%,EF50为0.2113,频率分布范围较宽.β-NA酯酶的频率分布,鼠李、花椒、木槿和棉苗上棉蚜酯酶活力(每0.033头蚜虫的OD值)小于0.10时为52%~62%的个体,EF50分别为0.098、0.084、0.102和0.091,寄主之间差异不大,而石榴和高密棉蚜分别为23%和3%,EF50分别为0.135和0.2136,与其它4个寄主有明显差异.
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