Seasonal Abundance ofLimothrips denticornis(Thysanoptera: Thripidae) on Spring Barley
作者:
Barbara A. Bates,
Michael J. Weiss,
期刊:
Environmental Entomology
(OUP Available online 1991)
卷期:
Volume 20,
issue 2
页码: 577-581
ISSN:0046-225X
年代: 1991
DOI:10.1093/ee/20.2.577
出版商: Oxford University Press
关键词: Insecta;Limothrips denticornis;population dynamics;sampling
数据来源: OUP
摘要:
The seasonal abundance ofLimothrips denticornisHaliday on spring barley (Hordeum vulgareL.) was examined during the growing seasons of 1987 and 1988 to aid in the development of an efficient sampling scheme. In 1987,78% of the immature population occurred during growth stage 10.4–11.1 (Feekes scale) (inflorescence three-quarters emerged-milk stage). In 1988, 81% of the immature population occurred during growth stage 10.54–11.2 (early milk stage–dough stage). The difference may be attributed to the drought conditions present in 1988, increasing the rate of plant development. When immature and adult counts were examined based on Julian day rather than on plant developmental stage, population trends occurred on similar dates in both years. Both adult and immature populations were concentrated on the top two leaf sheaths of barley regardless of plant development stage. There were significant differences between adult counts in quadrats within growth stages; a field edge effect was present both at the beginning and end of the season.
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