The role of annual grasses in the phenology ofRhopalosiphum padiin the low rainfall belt of South Australia
作者:
PAUL J. DE. BARRO,
HUGH WALLWORK,
期刊:
Annals of Applied Biology
(WILEY Available online 1992)
卷期:
Volume 121,
issue 3
页码: 455-467
ISSN:0003-4746
年代: 1992
DOI:10.1111/j.1744-7348.1992.tb03456.x
出版商: Blackwell Publishing Ltd
关键词: Rhopalosiphum padi;grasses;phenology;Australia;alate production;photoperiod;plant age
数据来源: WILEY
摘要:
SummaryRhopalosiphum padi(L.) (Hemiptera: Aphididae) was the first species of cereal aphids to colonise annual grasses across the state each year. Numbers were higher in the Lower Murray Valley than in the Mount Lofty Ranges or Adelaide Plains. At all locations, numbers generally increased until grasses reached the boot stage after which they declined. Alatoid production commenced in late July in response to crowding, but thereafter plant age and photoperiod were more important determinants.Metopolophium dirhodum(Walker) (Hem‐pitera: Aphididae) andSitobionnrfragariae(Hemiptera: Aphididae) first appeared in annual grasses in late Jul
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