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Variation in susceptibility to pyriproxyfen in four laboratory strains of Podisus maculiventris (Say) (Het., Pentatomidae)
Author(s) -
Clercq P.,
Mestdagh I.,
Degheele D.
Publication year - 1998
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1998.tb01520.x
Subject(s) - biology , pyriproxyfen , pentatomidae , nymph , zoology , heteroptera , instar , ingestion , toxicology , larva , botany , endocrinology
The susceptibility of four laboratory strains of the spined soldier bug, Podisus maculiventris (Say), to the juvenile hormone mimic pyriproxyfen was examined in the laboratory. Fifth instar nymphs (< 24 h old) were exposed to pyriproxyfen via ingestion of treated drinking water. LC 50 values for a long‐term laboratory strain originating from Florida (FLO), a more recently introduced strain from Indiana (IND), and two mildly inbred strains (IS1, IS2) of the latter origin, were comparable, ranging from 39.8 to 61.6 mg a.i. ˙ 1 −1 . However, slopes of dose–mortality curves indicated that the susceptibility of the four populations of P. maculiventris decreased in order of IS2 > IS1 ≅ FLO > IND. The results of this study are discussed with respect to strain maintenance and quality control of natural enemies used to test side‐effects.