Comparison of dose responses and resistance ratios in four populations of the rice stem borer, Chilo suppressalis (Lepidoptera: Pyralidae), to 20 insecticides
- 2 January 2008
- journal article
- research article
- Published by Wiley in Pest Management Science
- Vol. 64 (3), 308-315
- https://doi.org/10.1002/ps.1522
Abstract
BACKGROUND: Chemical control is a major strategy for suppressing the rice stem borer, Chilo suppressalis (Walker). Owing to their high toxicity and increasing resistance development in the target insect, many insecticides will be phased out entirely in 2007 in China. Alternatives with relatively low toxicity are urgently needed to replace traditional chemicals for rice stem borer control. In this study, the authors examined four field populations of C. suppressalis for their toxicological responses to more than 20 insecticides, including a few low‐toxicity organophosphates and many novel pesticides. Interpopulation resistance levels to 12 conventional insecticides were also compared. RESULTS: Based on LD50 values, the rice stem borer was most sensitive to avermectins and fipronil (LD50 < 1 ng larva−1). The stem borers exhibited the least sensitivity to endosulfan (LD50 > 100 ng larva−1) and monosultap (LD50 > 1000 ng larva−1). Insect growth regulators and chitin synthase inhibitors showed great efficacy against C. suppressalis, especially against populations that had developed resistance to conventional insecticides. Four field populations showed variable tolerance levels to many insecticides. LYG05 was the most susceptible population, only with a low level of resistance to monosultap (RR = 6.6). NC05 and GL05 populations exhibited intermediate tolerance levels with RR values up to 20.4 and 52.8 respectively. RA05 was the most resistant population to many insecticides, with resistance ratios up to 76.2. CONCLUSION: The results from this study provide valuable information for selection and adoption of new alternative insecticides and for resistance management of the rice stem borer. Copyright © 2008 Society of Chemical IndustryKeywords
This publication has 7 references indexed in Scilit:
- Biorational Insecticides — Mechanisms, Selectivity and Importance in Pest ManagementPublished by Springer Science and Business Media LLC ,2004
- Insect Pest ManagementPublished by Springer Science and Business Media LLC ,2004
- Triazophos resistance mechanisms in the rice stem borer (Chilo suppressalis Walker)Pesticide Biochemistry and Physiology, 2003
- NEW INSECTICIDES WITH ECDYSTEROIDAL AND JUVENILE HORMONE ACTIVITYAnnual Review of Entomology, 1998
- Avermectins, A Novel Class of Compounds: Implications for Use in Arthropod Pest ControlAnnual Review of Entomology, 1991
- Dietary TH 6040 alters composition and enzyme activity of housefly larval cuticlePesticide Biochemistry and Physiology, 1974
- Third-Generation PesticidesScientific American, 1967