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The effect of pod growth stages in cowpea on aphid reproduction and damage by the cowpea aphid, Aphis craccivora (Homoptera: Aphididae)
Author(s) -
OFUYA T. I.
Publication year - 1989
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1989.tb06578.x
Subject(s) - aphis craccivora , biology , aphididae , homoptera , point of delivery , aphid , vigna , infestation , horticulture , agronomy , botany , pest analysis
Summary Cowpea, Vigna unguiculata was infested at the young, mid‐fill and mature pod growth stages with, respectively, one, two and three pre‐reproductive adult apterae of Aphis craccivora per pod in a screen house. A. craccivora caused pod shrivelling at the young and mid‐fill pod stages, on which the aphid was more fecund. All levels of infestation caused significant reduction in seed yield irrespective of age of pod.