The role of refuge areas in the phenology ofRhopalosiphum padiin low rainfall cropping areas of South Australia
作者:
PAUL J. DE. BARRO,
DEREK A. MAELZER,
HUGH WALLWORK,
期刊:
Annals of Applied Biology
(WILEY Available online 1992)
卷期:
Volume 121,
issue 3
页码: 521-535
ISSN:0003-4746
年代: 1992
DOI:10.1111/j.1744-7348.1992.tb03462.x
出版商: Blackwell Publishing Ltd
关键词: Rhopalosiphum padi;alate production;pastures;refuge areas;South Australia
数据来源: WILEY
摘要:
SummaryExtensive surveys of possible aphid habitats in South Australia indicated that irrigated perennial grass pastures in the Mount Lofty Ranges and Lower Murray Valley were summer refuges forRhopalosiphum padi(L.) (Hemiptera: Aphididae). Large numbers of aphids build up in these pastures each year during autumn (April and May) with numbers peaking in May. The size of the May peak was related to the number of aphids surviving the summer. The proportions of alates were highest in May and August/September. Both peaks coincided with a photoperiod of between 11.2 and 11.5 h, and partial correlations suggested that aphid density, photoperiod and temperature were all significant determinants of alate production.
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