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Alarm pheromone secretion by insecticide‐susceptible and ‐resistant Myzus persicae treated with demeton‐S‐methyl; aphid dispersal and transfer of plant viruses
Author(s) -
RICE A. D.,
GIBSON R. W.,
STRIBLEY M. F.
Publication year - 1983
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.1744-7348.1983.tb02774.x
Subject(s) - myzus persicae , biology , potato virus y , pirimicarb , aphid , aphididae , botany , pheromone , homoptera , horticulture , plant virus , virus , pest analysis , virology
SUMMARY The insecticides demeton‐S‐methyl and pirimicarb induced cornicle secretion, and thereby alarm pheromone release, in Myzus persicae. Secretion was earliest in young and insecticide‐susceptible aphids. In laboratory experiments to assess the behavioural significance of this effect, demeton‐S‐methyl applied to colonies of R 1 (moderately resistant) aphids killed the majority, but caused the remainder to disperse. The timing and degree of dispersal depended on the size and composition of the colonies. Beet yellows virus was transferred by dispersed aphids, but less frequently when recipient indicator seedlings were treated with demeton‐S‐methyl. R 2 (strongly resistant) aphids soon dispersed from colonies containing susceptible nymphs (which secrete alarm pheromone early) and transmitted readily even to treated seedlings. The non‐persistent potato virus Y was transferred by dispersed R : aphids and no protection was afforded by treatment of the seedlings.