Welcome to Chinese Journal of Biological Control,Today is

Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (1): 42-49.DOI: 10.16409/j.cnki.2095-039x.2021.01.018

• RESEARCH REPORTS • Previous Articles     Next Articles

Influence of Three Insecticides (Acaricides) on Predation Function of Neoseiulus bicaudus

FU Zhenshi, TANG Siqiong, SU Jie, CHEN Jing, ZHANG Jianping   

  1. Key Laboratory of Oasis Agricultural Pest Management and Plant Resource Utilization, Xinjiang Uygur Autonomous Region/College of Agriculture, Shihezi University, Shihezi 832000, China
  • Received:2020-08-11 Online:2022-02-08 Published:2022-03-01

Abstract: The safety of insecticides (acaricides) to Neoseiulus bicaudus was evaluated throug measuring the toxicity of cyflumetofen, chlorantraniliprole and thiamethoxam to N. bicaudus and T. turkestani by spraying method. The influence of three insecticides (acaricides) and different application methods on the predation of N. bicaudus were determined. The results showed that the toxicity of cyflumetofen on N. bicaudus was significantly lower than that on T. turkestani, the corrected mortality rate of N. bicaudus was below 15% even at the concentration of 1000 mg/L, whereas the LC50 for T. turkestani was 65.08 mg/L. Toxicity of chlorantraniliprole and thiamethoxam on both N. bicaudus and T. turkestani was low, and the corrected mortality rate was below 20%. When treated with the three pesticides, the predatory mites showed decreased attack rate, predation ability, maximum consumption rate and searching efficiency and elongated handling time. The strength of the influence of the three agents ranked as:thiamethoxam > chlorantraniliprole > cyflumetofen. Amont the multiple treatments, only spraying cyflumetofen before releasing the predatory mite showed no significant influence on the predation function of N. bicaudus. With each insecticide, spraying before releasing predatory mites resulted in a less significantly influence than that of spraying after releasing predatory mites. Cyflumetofen showed only limited negative influence on the survival and predation of N. bicaudus. When field pest mites outbreak, cyflumetofen can be sprayed to reduce the pest population and then N. bicaudus can be released to achieve a combined control of the pests, thus reducing the dose and frequency of pesticide sprays. When chlorantraniliprole and thiamethoxam are used for control of other pests, it is better that they are used before releasing N. bicaudus, thus reducing their negative influence on N. bicaudus.

Key words: predatory mites, cyflumetofen, chlorantraniliprole, thiamethoxam, predation ability, biological control

CLC Number: