The role of grasslands in the yearly life‐cycle ofRhopalosiphum padi(Homoptera: Aphididae) in Sweden.
作者:
S. WIKTELIUS,
期刊:
Annals of Applied Biology
(WILEY Available online 1987)
卷期:
Volume 110,
issue 1
页码: 9-15
ISSN:0003-4746
年代: 1987
DOI:10.1111/j.1744-7348.1987.tb03227.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
SUMMARYThe population density of the bird cherry‐oat aphid (Rhopalosiphum padi) was monitored in spring sown barley and in grasslands (leys and pastures) and a suction trap was used to monitor the flight periodicity of the aphids. Emigrants from the primary host (bird cherry) colonised both grass and cereals in spring and a migration from cereals to grasses took place in mid‐summer. There was a negative correlation between the sizes of summer and autumn migration. There was a positive relationship between late summer growth in leys and the size of autumn migrations. It is concluded that the size of the autumn migration is mainly dependent on aphid population growth in grasslands during late summer and aut
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