How to prevent and control asparagus stem blight? Detailed explanation of control methods
How to prevent and control asparagus stem blight? Please introduce the methods. Asparagus stem blight can be prevented and controlled by referring to the following methods: 1. When planting asparagus, choose flat, fertile sandy loam land that can be irrigated and drained. 2. Promptly and thoroughly handle diseased plant residues. Overwintering stalks must all be dealt with before "Spring Equinox"; diseased branches should be removed promptly;...
How to prevent and control asparagus stem blight? Please introduce the methods
Asparagus stem blight can be prevented and controlled by referring to the following methods:
1. When planting asparagus, choose flat, fertile sandy loam land that can be irrigated and drained.
2. Promptly and thoroughly handle diseased plant residues. Overwintering stalks must all be dealt with before "Spring Equinox"; diseased branches should be removed promptly; for those keeping mother stems for spear harvest, the mother stems should be kept in sufficient quantity all at once, and during the harvest period the spears that grow and the spears must not be missed in harvesting, so as to control the reproduction and spread of the disease.
3. Strengthen field management, apply more organic fertilizer, and implement formula fertilization. The ratio of nitrogen, phosphorus, and potassium content in the soil should preferably be close to 1:1:1. Pay attention to intertillage and weeding, pest control, drought prevention, and drainage. Asparagus fields older than 2 years must not be intercropped with other crops.
4. From the emergence of asparagus buds to late September, spray pesticide once a week for prevention and control. When spraying, young spears and tender stems should especially be covered evenly and thoroughly. The pesticide and dosage used per mu each time: ① 40% SPI-8701 suspension concentrate 0.2 kg. ② Carbendazim wettable powder or suspension concentrate: 0.15 kg-0.2 kg for 40%-50%; 0.3 kg-0.2 kg for 25%-30%. ③ 75% chlorothalonil wettable powder 0.1 kg. ④ Nongkang 120 0.4 kg-0.5 kg.
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