Insecticidal Activity of Camptothecin Against Nilaparvata lugens, Brevicoryne brassicae, and Chilo suppressalis

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Abstract:

Greenhouse tests showed that 0.2% camptothecin emulsifiable concentrate (EC) has strong contact toxicity to three agricultural pests, with LC50 and LC90 values of 0.1–0.6 and 0.4–5.0 mg liter−1, respectively. The descending order of susceptibility was Nilaparvata lugens (StÃ¥hl) > Brevicoryne brassicae (L.) > Chilo suppressalis (Walker). Field tests showed that the corrected mortality of B. brassicae and N. lugens was 94.6 and 69.1%, respectively, which was not significantly different from that with 10% imidacloprid WP at 98.4 and 63.4%, respectively. The corrected mortality of C. suppressalis was 85.8%, which was not significantly different from that with 5% Regent SC at 93.0%. Camptothecin EC showed no acute oral toxicity to the mouse (LD50 > 5,000 mg/kg) nor acute dermal toxicity (LD50 > 2,000 mg/kg).

Keywords: Brevicoryne brassicae; Chilo suppressalis; Nilaparvata lugens; camptothecin; natural insecticide

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/EC08284

Publication date: April 1, 2010

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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