Applied Entomology and Zoology (1998) 33, 435-440

N. Sota, N. Motoyama, K. Fujisaki and F. Nakasuji (1998)
Possible amplification of insecticide hormoligosis from resistance in the diamondback moth, Plutella xylostella (Lepidoptera : Yponomeutidae)
Applied Entomology and Zoology 33 (3), 435-440
Abstract: The possibility that insecticide hormoligosis might be amplified by resistance in the diamondback moth, Plutella xylostella, was tested. The fecundity of females treated with sublethal doses (LD_12.5, LD₂₅ and LD₅₀) of fenvalerate or methomyl in the non-selected generation increased in comparison with the control group treated with acetone. The number of eggs laid by treated females in the 10th generation of the fenvalerate-selected strain, which had developed about 10,000-fold resistance, was the same or smaller than that of the control. On the other hand, fecundity in the 8th generation of the methomyl-selected strain, which had about 4.9-fold resistance, was slightly higher in the LD_12.5 and LD₂₅ than that of control. The intensity of insecticide hormoligosis did not depend on the dose of the insecticide although a sublethal dose of the insecticides stimulated reproduction in the susceptible DBM. Furthermore, the hormoligosis was not amplified in concert with the development of resistance in the DBM.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella		Japan