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Differential aphicidal effects of chitinase inhibitors on the polyphagous homopteran Myzus persicae (Sulzer)
Author(s) -
Saguez Julien,
Dubois Françoise,
Vincent Charles,
Laberche JeanClaude,
SangwanNorreel Brigitte S,
Giordanengo Philippe
Publication year - 2006
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.1289
Subject(s) - myzus persicae , aphid , fecundity , chitinase , biology , population , proline , aphididae , botany , horticulture , pest analysis , biochemistry , enzyme , homoptera , amino acid , medicine , environmental health
Four chitinase inhibitors, cyclo‐(Proline‐Tyrosine), cyclo‐(Histidine‐Proline), allosamidin and psammaplin A, were selected for in vitro feeding experiments with the peach‐potato aphid, Myzus persicae (Sulzer), under controlled photoperiod and temperature conditions. Artificial diets were used to provide chitinase inhibitors at 10, 50 and 100 µg mL −1 to M. persicae . Except for cyclo‐(Proline‐Tyrosine), which did not modify aphid demographic parameters, chitinase inhibitors induced differential aphicidal effects on M. persicae . At all doses, cyclo‐(Histidine‐Proline) induced significant effects affecting daily fecundity, intrinsic rate of natural increase ( r m ) and doubling time of population. When compared with the control diet, allosamidin decreased nymph survival and daily fecundity, increasing the doubling time of population from 1 to 1.5 days. Psammaplin A was the most toxic inhibitor when delivered via artificial diet, as it induced the death of all aphids reared at 50 and 100 µg mL −1 . The results demonstrate the potential use of chitinase inhibitors as aphid management tools. Copyright © 2006 Society of Chemical Industry