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Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (1): 132-137.doi: 10.11924/j.issn.1000-6850.casb20200300178

Special Issue: 植物保护 水稻

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Technologies of Reducing Pesticide Application Amount in the Whole Process of Rice Diseases, Pests and Weeds Control

Si Zhaosheng1(), Song Xiandong1, Gong Xiangyu1, Li Peng1, Zhao Tongzhi2   

  1. 1Plant Quarantine and Plant Protection Station of Heilongjiang Province, Harbin 150090
    2Agricultural Technology Extension and Service Center of Beilin District, Suihua City, Suihua Heilongjiang 152000
  • Received:2020-03-07 Revised:2020-07-14 Online:2021-01-05 Published:2020-12-25

Abstract:

In this paper, the advantages and disadvantages of the technologies of reducing pesticide application amount in the whole process of rice diseases, pests and weeds control were compared. Three pesticide reduction schemes were designed, including non-chemical green control technology, chemical agent and chemical agent reduction plus additives. In scheme I, the total chemical dosage was 6450 mL/hm2, and the proportion of herbicide in the field was 97.7%. In scheme II, the total chemical dosage was 8285.55 mL/hm2, and the proportion of herbicide was 62%. In scheme III, the chemical dosage was 6616.05 mL/hm2, and the proportion of herbicide was 36.7%. The application times of scheme I were 4 times less than those of scheme II and scheme III, and the chemical dosage was 1835.55 mL/hm2 and 166.05 mL/hm2 less than those of scheme II and scheme III, with a reduction of 22.2% and 2.5%, respectively. Compared with scheme II, the dosage of chemical agent in scheme III was reduced by 1669.5 mL/hm2. In terms of pesticide reduction and control effect, scheme I and scheme III achieved the expected result. Scheme I could control rice leaf miner and rice stem borer with biological measures, and its control effect was slightly higher than that of the other two schemes.

Key words: rice, whole process, control, reduction

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