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- Title
Joint Toxicity of Beauveria bassiana and Two Insect Growth Regulators on Beet Armyworm, Spodoptera exigua (Hübner).
- Authors
Hu Anling; Tian Zhaofeng; Gao Xiwu; Nong Xiangqun; Li Yongdan
- Abstract
Joint toxicity of Beauveria bassiana and two insect growth regulators, methoxyfenozide and hexaflumuron, on beet armyworm larvae, Spodoptera exigua (lliibner) , were investigated. An obvious synergism effect of the two insect growth regulators with B. beauveria was observed. When the insect growth regulators at LC50 concentrations (25 × 10-6 g/L for methoxyfenozide and 1 000 × 10-6 g/L for hexaflumuron) wrere mixed with B. bassiana at the volume ratio of 4: 1 , the mixtures achieved the best efficacy. The co-toxicity co-efficient (CTC) of methoxyfenozide and B. bassiana was 285, and that of hexaflumuron and R. bassiana was 208. Scanning electron microscope observation of the longitudinal section of S. exigua revealed obviously different patterns of integument in different treatment groups.
- Subjects
BEAUVERIA bassiana; INSECT growth regulators; BEET armyworm; TOXICOLOGY; METHOXYFENOZIDE; HEXAFLUMURON
- Publication
Plant Diseases & Pests, 2016, Vol 7, Issue 5/6, p1
- ISSN
2152-3932
- Publication type
Article