Recently, many farmers in Linyi, Zibo, and Shouguang made a phone call and reported that their family had a “flower topping†phenomenon in the early spring and had a good appearance, and that shortly after the flowers were topping, the plant growth points were missing. The "headless" in the saying goes. In addition, the lower leaves of the cucumber are large and thick, with dark leaves. The vegetable farmers are helpless.
According to the analysis, cucumbers in early spring are now at the beginning of the fruiting period. The phenomenon of "flower topping" is nothing but the following types: fruiting and fruiting are often caused by rooting; roots are injured and flowers are topping; insufficient base fertilizers are responsible for flowering. top. However, the situation reflected by these vegetable farmers can basically eliminate the possibility of the above three situations. After careful inquiry of the vegetable farmers, the reporter thinks that the problem lies in the fact that the farmers used excessive amounts of azole agents to control powdery mildew in greenhouse cucumbers. Farmers have used a large number of agents such as Fuxing, Myclobutanil, and Gluconazole to control powdery mildew, resulting in inhibited growth of gibberellin in cucumber plants, resulting in dwarfing of plants, short internodes, and leaves. Shrinking and thick, not growing, and then make cucumber phytotoxicity, the above symptoms.
In response to this, vegetable farmers can be recommended to use the following agents to relieve symptoms: Spraying meimeiling (benzylaminopurine + gibberellic acid A4 + A7) 8000 times liquid + plant life No. 1 5000 times liquid. Normal growth can be resumed 5-10 days after spraying. In addition, when using water and fertilizer, temporarily emphasize the use of nitrogen fertilizer to help restore plant growth. The control of cucumber powdery mildew can be sprayed with agricultural antibiotic 120 or Wuyimycin 100-150 times liquid, 7-10 days once, continuous control 2-3 times; also can be used Shigeao or Ami Miao receive 1000 times liquid Spray treatment.
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