Studies on Bioactivity of Lufenuron to Experimental Population of Helcoverpa armigera

doi:10.7668/hbnxb.2008.S1.057

Abstract

Abstract: The bioact ivity of Lufenuron on experimental population of Helcoverpa armigera (H?bner) in the laboratory were carried out. The results showed that Lufenuron displayed good antifeedant activity on 3rd instar larvae and high ovicidal activity on 1-day eggs of Helcoverpa armigera (H?bner), the ant-i feeding rates of 10 mg/ kg and eggs mortality rates of 50 mg/ L were over 95104% and 87159%; LC50 of stomach poisoning and contact poisoning of 2nd instar larvae were 01743 4 and 121369 6 mg/ L with leaf and body dipping method 96 h after treatment, respect ively, Lufenuron showed that higher stomach act ivity was approximately 17 times of contact act ivity. The inhibition of the growth and development of cotton bollworm after treated with Lufenuron in diets were investigated. The larval and pupal period were elongated, and the rat ios of survival, pupation, emergence, oviposition numbers of female, and egg hatch ability decreased, unhealthy pupa and adult rates also increased.

Key words: Lufenuron, Helcoverpa armigera (H?bner) , Experimental population, Bioactivity

CLC Number:

S482.38

YAO Yong-sheng, LI Chun-fang, YE Hua-xiang, QING Hong. Studies on Bioactivity of Lufenuron to Experimental Population of Helcoverpa armigera[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(S1): 243-247. doi: 10.7668/hbnxb.2008.S1.057.

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http://www.hbnxb.net/EN/Y2008/V23/IS1/243

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