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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (22): 137-142.doi: 10.11924/j.issn.1000-6850.casb2023-0595

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Effect of Spraying Time of Atailing on Prevention and Control of Grape Diseases and Grape Quality

HAO Jianyu1(), CHEN Wenchao1, WANG Weijun1(), JING Gang1, JIA Qingbing1, WANG Yan1, HU Yang1, DING Jie1, ZHANG Bochao2   

  1. 1 Zhangjiakou Academy of Agricultural Sciences, Zhangjiakou, Hebei 075000
    2 Zhangjiakou Station for Popularizing Agricultural Technique, Zhangjiakou, Hebei 075000
  • Received:2023-08-21 Revised:2024-03-29 Online:2024-07-28 Published:2024-07-28

Abstract:

An experiment was conducted to explore a suitable period for spraying the biological pesticide Atailing on grapes in the area of Zhangjiakou, which would realize the prevention and control of grape diseases rationally and enhance the quality of grapes. In the experiment, 0.1% concentration of Atailing was sprayed at different growth stages of 1-year old ‘Miguang’ grape and 2016 planted ‘Fengguang’ grape respectively from 2020 to 2022 in order to observe the occurrence of grape downy mildew, the growth condition of the 1-year old ‘Miguang’ grape, and the fruit quality of ‘Fengguang’ grape. The results showed that the incidence rate of downy mildew was reduced by 14.2 percentage points, the disease index was reduced by 7.53, the perimeter of the grape trunk 20 cm above the ground was increased by 0.86 cm, and the length of the mature branch of the grape was increased by 65.17 cm when 0.1% concentration Atailing was sprayed twice at the stages of 4-6 leaves on the 1-year old ‘Miguang’ grape. While, the experiment results also showed that the incidence rate of downy mildew was reduced by 15.73 percentage points, the disease index was reduced by 9.64, the peel color of the grapes became blue black, the weight of a single ‘Fengguang’ grape was increased by 2.60 g, and the soluble solids content of the grape was increased by 1.47 percentage points, and the titratable acid content of ‘Fengguang’ grape was reduced by 0.12 percentage points, and the solid-acid ratio of ‘Fengguang’ grape was increased by 15.09 when 0.1% concentration Atailing was sprayed twice before the flowering time of ‘Fengguang’ grape. In conclusion, the biological agent of Atailing could enhance the grape resistance to diseases and reduce the incidence rate of grape diseases; also, it had certain effects on improving the growth condition and fruit quality of grapes.

Key words: biopesticide, Atailing, ’Miguang’ grape, ’Fengguang’ grape, growth periods, downy mildew, fruit quality, disease resistance