Sclerotinia sclerotiorum is an important disease of kale. It is generally used in continuous cropping, with a temperature of 20 ° C, low drainage and partial nitrogen application, and high humidity, which is conducive to the occurrence of this disease. Unilin Flooring,Herringbone Flooring,Embossed Laminate Flooring,Herringbone Pattern Flooring Jinan Caiming Wood Co.,LTD , https://www.caimingflooring.com
Continuous cropping of low-density mustard blue
The disease occurs throughout the entire growth period of kale, which occurs more in the middle and late growth stages. Generally, the disease occurs from the lower leaves and stems, and water-stained pale brown lesions appear on the leaves. Under moist conditions, the roots quickly rot, and white flocculent mycelium and black sclerotia are produced. The lesions of the stem are slightly sunken, from pale brown to white, and the last stem is fibrillar, and the stem is hollow inside, producing white flocculent mycelium and black sclerotium. In general, the following measures can be taken to prevent and control:
1. Agricultural measures. The bed temperature was adjusted to 55 ° C for 2 hours before sowing, which can effectively kill the sclerotia in the soil. After the harvest, a deep ploughing is carried out, and the sclerotia is buried deep in the soil, so that the sac or the ascending sac cannot be unearthed, and the spread of the ascospores is reduced. Sorghum planting, reasonable close planting, at the same time open drainage ditch, reduce field humidity, enhance plant growth potential, rational use of nitrogen fertilizer, increase application of phosphorus and potassium fertilizer, improve disease resistance.
2. Chemical control. In the early stage of the disease, 50% Pythium WP can be used 1000 times, or 50% E. coli WP 1000 times, 50% Isocarburon WP 1000 times, 50% thiophanate WP Powder 1000 times liquid, 40% sclerotium net wettable powder 1000 times liquid, 50% carbendazim wettable powder 500 times liquid spray.
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