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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (32): 145-149.doi: 10.11924/j.issn.1000-6850.casb2023-0450

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Control Effects of Different Chemicals on Underground Pests of Sweet Potato

ZUO Hongjuan1(), CAO Hui1, HUANG Songbo2, ZHANG Lipeng2, WANG Wei2, ZHANG Xiaoshen1()   

  1. 1 Zhengzhou Institute of Agricultural and Forestry Sciences, Zhengzhou 450005
    2 Henan Yifengnian Biotechnology Co., Ltd, Zhengzhou 450001
  • Received:2023-06-12 Revised:2023-08-23 Online:2023-11-15 Published:2023-11-10

Abstract:

In order to study the effect of different application rates (60kg/hm2, 75kg/hm2, 90kg/hm2) of thiamethylamine, Metarhizium anisoplariae, phoxium phoxium, Beauveria bassiana and other agents on the control of underground pests of sweet potato, the sweet potato ‘Yanshu 25’ was used as the test material and suitable insecticides and application dosage of underground sweet potato pests were screened in Zhengzhou and Hebi of Henan Province. The results showed that the control effects of the four agents were similar in Zhengzhou and Hebi. The suitable chemical agent was 0.5% thianidin 90 kg/hm2, the highest control effect and commercial rate were 86.67% and 92.63%, and the yield of fresh potato increased by 14.95% compared with the control. The application amount of Metarhizium anisopliae 200 million/g was 75 kg/hm2, and the control effect was good, the highest control effect and commercial rate were 77.85% and 91.45%, and the yield of fresh potato increased by 9.52% compared with control. The control effect of Beauveria bassiana 15 billion/g and 75 kg/hm2 was better, the highest control effect and commercial rate were 78.03% and 91.76%, and the highest yield increase of fresh potato was 10.86% compared with control. The chemical clothianidin and the biological agents Metarhizium anisopliae and Beauveria bassiana have good control effect on the underground pest of ‘Yanshu 25’, which are suitable for demonstration and popularization in sweet potato planting.

Key words: sweet potato, underground pests, medication, prevention and control effect