Presence–Absence Sequential Decision Plans for Management ofLygus lineolaris(Hemiptera: Miridae) on Strawberry
作者:
G. Mailloux,
N. J. Bostanian,
期刊:
Environmental Entomology
(OUP Available online 1989)
卷期:
Volume 18,
issue 5
页码: 829-834
ISSN:0046-225X
年代: 1989
DOI:10.1093/ee/18.5.829
出版商: Oxford University Press
关键词: Insecta;Lygus lineolaris;sequential sampling;strawberries
数据来源: OUP
摘要:
Sequential sampling plans based on binomial distribution are presented for determining the need for measures to control tarnished plant bug,Lygus lineolaris(Palisot de Beauvois), in strawberry fields. Because no single theoretical distribution could describe data counts in every field, a double plan was developed by fitting the data to a regression equation. The equation related the mean number of nymphs per blossom cluster to the proportion of infested blossom clusters in the field. Four density classes were recognized: high (above the action threshold level of 0.25 nymphs per blossom cluster), medium, low, and very low. The sequential sampling plan with an action threshold of 0.25 nymphs per blossom cluster was compared with randomly tapping 100 blossom clusters and calculating an average count of nymphs per blossom cluster. In 100 different fields, the two techniques gave similar conclusions on 88% of occasions.
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