Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (2): 264-271.DOI: 10.3969/j.issn.1004-1524.20230268

• Animal Science • Previous Articles     Next Articles

Effect of sublethal dosage of fenvalerate to growth and development of the silkworm, Bombyx mori

YU Ruixian1,2(), HU Xiuqing1,2, LIU Xinju1,2, TANG Tao1,2, WU Min1,2, WU Shenggan1,2, ZHAO Xueping1,2,*()   

  1. 1. Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    2. State Key Laboratory for Managing Biotic and Chemical Threats to Quality and Safety of Agro-Products, Hangzhou 310021, China
  • Received:2023-03-06 Online:2024-02-25 Published:2024-03-05

Abstract:

In order to provide reference for choosing pesticides in controlling pests in agro-mulberry mixed planting areas, the acute toxicity and developmental toxicity of fenvalerate to silkworm were investigated by leaf dipping method. The results of acute toxicity showed that the 96 h-LC50 for the 2nd instar larvae to fenvalerate was 0.251-0.570 mg·L-1, belonging to high and extreme level toxicity. The results of developmental toxicity showed that after the treatments at the sublethal dosages (0.062 8, 0.020 9, 0.006 98, 0.002 33 and 0.000 775 mg·L-1) of fenvalerate, the development duration and body weight of molting larvae were affected, and the influence gradually became less abvious with instar. The rate of pupation and dead cocoons of 0.002 33 and 0.000 775 mg·L-1 fenvalerate treatment groups were significantly affected (P<0.05), which significantly affected the individual growth and development. The cocoon shell weight of 0.062 8, 0.020 9 and 0.006 98 mg·L-1 fenvalerate treatment groups were significantly lower than that of the control group (P<0.05). Results showed that fenvalerate had high acute and chronic toxic effects on silkworms. Therefore, when using fenvalerate in agro-mulberry mixed planting areas, mulberry pollution from droplet drift or other agricultural activities should be avoided.

Key words: fenvalerate, Bombyx mori, sublethal effect, growth and developmental toxicity

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