Within-plant distribution of Bemisia tabaci (Homoptera : Aleyrodidae) adults and immatures on greenhouse-grown winter cucumber plants
文献类型: 外文期刊
第一作者: Hou, Maolin
作者: Hou, Maolin;Lu, Wei;Wen, Jihui
作者机构:
关键词: Bemisia tabaci;cucumber;within-plant distribution;sampling;INTRAPLANT DISTRIBUTION;SPATIAL-DISTRIBUTION;SAMPLING PLANS;TOMATO;POPULATIONS;CANTALOUPE;PATTERNS;COTTON
期刊名称:JOURNAL OF ECONOMIC ENTOMOLOGY ( 影响因子:2.381; 五年影响因子:2.568 )
ISSN:
年卷期:
页码:
收录情况: SCI
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.
分类号: Q969.9
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