摘要:

AbstractTebufenozide (RH‐5992), a nonsteroidal ecdysone agonist, stimulated significant (P≤ 0.05) growth in both testes of post‐diapausing codling moth larvae and a dormantAscogasterlarva in its overwintering host's hemocoel. Tebufenozide elicited the same responses in post‐diapausing testes andAscogasterlarvae as were reported earlier in insects treated with 20‐hydroxyecdysone (20‐OHE) [Friedlander, J Insect Physiol 35:29 (1989); Brown et al.,Endocrinological Frontiers in Physiological Insect Ecology. Wroclaw: Wroclaw Technical University Press, pp 443–447 (1988)]. Only a trace (≤ 1%) of14C‐tebufenozide was recovered from gonads and exuviae of healthy larvae, or fromAscogasterlarvae removed from parasitized hosts; however, the renewed growth of testes andAscogasterlarvae and apolysis of codling moth integument were an obvious response to the hormone agonist. Most of the injected14C‐tebufenozide was recovered from host fat body, while the alimentary canal retained approximately 40% of the14C‐tebufenozide fed in an artificial diet.Host exposure to tebufenozide did not cause apolysis in endo‐ or ectoparasitic hymenopterans feeding on treated codling moth larvae; however, the endoparasitoid trapped in the host's hemocoel died as its host's tissue deteriorated. Different results were observed on ectoparasitoids developing on treated hosts. EctoparasiticHyssopussp. (Eulophidae) larvae feeding on tebufenozide treated hosts pupated in the normal length of time.Hyssopusadults which developed from larvae fed tebufenozide treated hosts were fertile and produced as many progeny as adults reared from solvent fed controls. There was no evidence of secondary poisoning toHyssopussp. and codling moth exposure to tebufenozide may actually benefit the rearing of this eulophid by maintaining the host in the susceptible larval stage and preventing the host larva from spinning a cocoon.

ISSN:0739-4462    

DOI:10.1002/arch.940260212

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

ISSN:0739-4462    

DOI:10.1002/arch.940260201

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY