Pd. Cox et al., THE EFFECT OF BEHAVIOR ON THE SURVIVAL OF CRYPTOLESTES-FERRUGINEUS INAN INSECTICIDE-TREATED LABORATORY ENVIRONMENT, Journal of Stored Products Research, 33(3), 1997, pp. 257-269
The effect of refuge-seeking behaviour on the survival of two insectic
ide resistant (malathion-specific) and two susceptible strains of Cryp
tolestes ferrugineus (Stephens) in laboratory arenas treated with inse
cticide was determined. Insect mortalities were reduced significantly
when artificial refuges were present in arenas treated with either fen
itrothion or malathion. The strain exhibiting the highest degree of re
fuge-seeking behaviour also had the highest survival rates in treated
arenas. In arenas treated with fenitrothion, refuge-seeking behaviour
increased at a high dose (250 mg/m(2)) compared to a lower dose (2 mg/
m(2)). More beetles were found in refuges on arenas treated with fenit
rothion than in refuges on untreated arenas; however, no such differen
ce was observed in malathion-treated arenas. fenitrothion-treated aren
as, most beetles died in the refuges but when arenas were treated with
malathion, more beetles died in the arenas than in the refuges. The i
mplications of these results for pest control are examined. (C) 1997 E
lsevier Science Ltd.