1. Verticillium wilt: Eggplant verticillium is commonly known as “half-side yellow and half-madâ€. It begins to express symptoms after fruit setting, and it develops from bottom to top or from side to whole. Symptoms are: yellowing of the early veins of the leaves, gradually browning, edge dead or whole leaves withered yellow; plant disease leaves develop from bottom to top, early noon wilting, early and late can recover, late leaves fall off, whole plant death; roots and stems Cut longitudinally and the vascular bundle becomes brown or black.
In the early stage of the disease, 50% carbendazim WP 500 times solution, or 50% methyl thiophanate WP 500 times solution, or 30% DT bactericide 350 times solution should be used in time for 0.25 kg per solution. It can be filled once every 7-10 days, and it can be irrigated 2 or 3 times.
2, powdery mildew: due to high temperature and drought, it is easy to cause a large number of outbreaks of powdery mildew. Symptoms: Mainly harmful to the leaves. Most of the middle and lower leaves first developed, and gradually developed into the upper leaves. At the beginning, white hairs appearing on the leaves, and amorphous chlorotic small yellow spots appear. After development, white powdery mildew spots of different shapes and sizes are formed, and the edge boundaries are not clear. After further expansion, the whole leaf surface can be covered. In severe cases, the front and back sides of the blade can be covered by powder, and the leaf surface is covered with a layer of white powder. After removing the white powder, the tissue of the diseased part is chlorotic, and then the yellowing is dry.
Control method: In the late stage of fruit growth, prevent premature aging of plants, timely topdressing can reduce the condition; pay attention to reasonable irrigation and timely drainage after rain; strengthen cultivating and cultivating soil, promote root growth of plants; timely remove the lower disease and old leaves of plants, reduce both bacterial sources and Conducive to ventilation and light. In the early stage of the disease, spray 15% triazolone wettable powder 1000 times liquid or 40% Fuxing emulsifiable oil 4000 times liquid, or 30% fluconazole wettable powder 1500-2000 times liquid, or 40% polysulfur suspension agent 500-600 times liquid Or 50% sulfur suspension agent 250 ~ 300 times solution.
3, viral disease: chemical control can be used 1.5% phytopathogenic emulsion 1000 times liquid or 20% virus A wettable powder 500 times liquid or anti-toxic agent No. 1 200 ~ 300 times liquid sprayed every 7 to 10 days, continuous 2 ~3 times.
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