TY - JOUR
T1 - Inheritance of resistance to pyriproxyfen in Bemisia tabaci (Hemiptera: Aleyrodidae) males and females (B biotype)
AU - Crowder, David W.
AU - Ellers-Kirk, Christa
AU - Yafuso, Christine M.
AU - Dennehy, Timothy J.
AU - Degain, Benjamin A.
AU - Harpold, Virginia S.
AU - Tabashnik, Bruce E.
AU - Carrière, Yves
PY - 2008/6
Y1 - 2008/6
N2 - We evaluated effects of the insect growth regulator pyriproxyfen on Bemisia tabaci (Gennadius) (Bbiotype) (Hemiptera Aleyrodidae) males and females in laboratory bioassays. Insects were treated with pyriproxyfen as either eggs or nymphs. In all tests, the LC50 for a laboratory-selected resistant strain was at least 620 times greater than for an unselected susceptible strain. When insects were treated as eggs, survival did not differ between males and females of either strain. When insects were treated as nymphs, survival did not differ between susceptible males and susceptible females, but resistant males had higher mortality than resistant females. The dominance of resistance decreased as pyriproxyfen concentration increased. Resistance was partially or completely dominant at the lowest concentration tested and completely recessive at the highest concentration tested. Hybrid female progeny from reciprocal crosses between the susceptible and resistant strains responded alike in bioassays; thus, maternal effects were not evident. Rapid evolution of resistance to pyriproxyfen could occur if individuals in field populations had resistance with traits similar to those of the laboratory-selected strain examined here.
AB - We evaluated effects of the insect growth regulator pyriproxyfen on Bemisia tabaci (Gennadius) (Bbiotype) (Hemiptera Aleyrodidae) males and females in laboratory bioassays. Insects were treated with pyriproxyfen as either eggs or nymphs. In all tests, the LC50 for a laboratory-selected resistant strain was at least 620 times greater than for an unselected susceptible strain. When insects were treated as eggs, survival did not differ between males and females of either strain. When insects were treated as nymphs, survival did not differ between susceptible males and susceptible females, but resistant males had higher mortality than resistant females. The dominance of resistance decreased as pyriproxyfen concentration increased. Resistance was partially or completely dominant at the lowest concentration tested and completely recessive at the highest concentration tested. Hybrid female progeny from reciprocal crosses between the susceptible and resistant strains responded alike in bioassays; thus, maternal effects were not evident. Rapid evolution of resistance to pyriproxyfen could occur if individuals in field populations had resistance with traits similar to those of the laboratory-selected strain examined here.
KW - Bemisia tabaci
KW - Haplodiploid
KW - Insect growth regulator
KW - Insecticide resistance
KW - Pyriproxyfen
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U2 - 10.1603/0022-0493(2008)101[927:IORTPI]2.0.CO;2
DO - 10.1603/0022-0493(2008)101[927:IORTPI]2.0.CO;2
M3 - Article
C2 - 18613596
AN - SCOPUS:46849086357
SN - 0022-0493
VL - 101
SP - 927
EP - 932
JO - Journal of economic entomology
JF - Journal of economic entomology
IS - 3
ER -