Sampling and Dispersion of Pepper Weevil (Coleoptera: Curculionidae) Adults
作者:
D. G. Riley,
D. J. Schuster,
C. S. Barfield,
期刊:
Environmental Entomology
(OUP Available online 1992)
卷期:
Volume 21,
issue 5
页码: 1013-1021
ISSN:0046-225X
年代: 1992
DOI:10.1093/ee/21.5.1013
出版商: Oxford University Press
关键词: Anthonomus eugenii;sampling;dispersion
数据来源: OUP
摘要:
Sampling studies were conducted to assess intra- and interplant dispersion of pepper weevil,Anthonomus eugeniiCano, adults and to compare adult sampling methods. More weevils were observed on fruiting buds than on other plant structures, and adult numbers varied diurnally on the exposed portions of the plant. The number of pepper weevil adults on exposed terminal buds was significantly higher in the morning than the afternoon. Interplant dispersion estimates using terminal bud inspection suggested that pepper weevil adults are clumped (Taylor's Power Law:b= 1.2, sample unit = five contiguous plants, two terminal buds per plant) in commercial bell-pepper fields. A concentration of pepper weevil in the field margins was observed at two farm sites. Taylor's Power Law coefficients did not vary significantly over time or with changes in population density, but the slopebwas sensitive to pepper variety and sample position on the plant. Variance-to-mean ratios and Morisita's index were affected by quadrat size. A comparison of terminal bud inspection, whole plant inspection, and an absolute sample for pepper weevil adult counts indicated that terminal bud inspection had a greater relative net precision than whole plant inspection.
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