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首页> 外文期刊>Journal of Economic Entomology >Within-plant distribution of Bemisia tabaci (Homoptera : Aleyrodidae) adults and immatures on greenhouse-grown winter cucumber plants
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Within-plant distribution of Bemisia tabaci (Homoptera : Aleyrodidae) adults and immatures on greenhouse-grown winter cucumber plants

机译：大棚种植的冬季黄瓜植物上烟粉虱（Homooptera：Aleyrodidae）成虫的植物内分布和未成熟

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摘要

Within-plant distribution of adults, pupae, nymphs, and eggs of Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) on leaves of greenhouse-grown winter cucumber, Cucumis sativum L., plants were studied in field plots for integrated pest management decision making. Distribution of specific life stages depended on the leaf positions. The leaves with most abundance and low or lowest variation of whiteflies were leaves 8-12 for adults, 8-11 for pupae, 6-12 for nymphs, and 6-9 for eggs. In light of the criterion in selecting within-plant sample sites with pest abundance and low variation, these leaves were considered as the most convenient for sampling specific life stages of B. tabaci. Single a and b values for each life stage of the whitefly were calculated by Taylor's power law and were used to estimate minimum sample sizes at a precision of 0.25 (SE/mean). The minimum sample size decreased with increasing density of adults on leaves 8-12, of nymphs on leaves 7 and 8, and of eggs on leaf 6, but slightly increased with increasing density of pupae on leaves 8-11, of nymphs on leaves 6 and 9-12, and of eggs on leaves 7-9.
机译：在田间地块上研究了烟粉虱（Gemindius）（成虫：Aleyrodidae）的成虫，p，若虫和卵在植物体内的分布，并在田间地块上研究了植物，以进行有害生物综合治理决策。 。具体生命阶段的分布取决于叶片的位置。白粉虱的丰度最高且变化最低或最低的叶子是成年叶子8-12，成虫叶子8-11，若虫为6-12，卵为6-9。根据选择有害生物丰度低，变异程度低的植物内部样品地点的标准，这些叶子被认为是对烟粉虱特定生命阶段进行取样的最方便方法。粉虱每个生命阶段的单个a和b值是根据泰勒幂定律计算的，并用于以0.25（SE /平均值）的精度估算最小样本量。最小样本大小随成叶8-12上成虫，若虫7和8上的卵，卵上卵6的增加而减小，但随p8-11上的up，叶子6上的若虫密度的增加而略有增加。 9-12和鸡蛋在叶子7-9上。

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