In recent years, eggplant verticillium wilt and cotton blight have become the two most common diseases in eggplant production. They are often severely affected in rainy years and seasons, with light yield reductions of 20% to 30% and weights of more than 60%. , causing great economic losses to vegetable farmers. Eggplant verticillium wilt is also called madness and black heart disease. The plague is also called egg drop and rotten eggplant. The former harms the leaves, and the latter mainly harms the fruit.
I. Symptom recognition: Verticillium wilt mainly affects the leaves, which can occur in all growth stages of eggplant, with the most serious result. At the beginning of the disease, the leaves of the lower leaves produce pale yellow spots, and gradually develop to the half leaves or the whole leaves. The diseased leaves are bun during the day and recover at night. The color changes from yellow to brown, and the edges are rolled up. Finally, the whole leaves die and fall off, and the disease occurs. In severe cases, it can be developed to the whole plant. Cotton blight mainly harms fruits and can also damage leaves, stems and flowers. The fruit is infected when it is near maturity, so the fruit in the middle and lower parts is more damaged in the field. Initially, a nearly round dark brown, moist lesion appeared on the fruit. When the disease conditions were suitable, it rapidly expanded, gradually rotting the whole fruit. When the field humidity was high, the white mycelium of the mycelium was covered on the lesion. The infected leaves have obvious ring patterns, and the stems are dry and dead when the stems are seriously infected.
Second, comprehensive prevention and control: from the start of planting and planting should take appropriate preventive measures for the incidence of these two diseases, such as soaking seeds disinfection, crop rotation, cultivation of strong seedlings, rational fertilization and watering. Since these two diseases are relatively serious diseases during the growth period of eggplant, the plants are in the high temperature and rainy season at the flowering stage, and should be sprayed once every 7 to 10 days: 58% toxic myricium manganese zinc 500 Double solution or 64% anti-virus 矾 500 times solution or 40% ethyl phosphorus aluminum 300 times solution can be used alternately, which can achieve better results.
I. Symptom recognition: Verticillium wilt mainly affects the leaves, which can occur in all growth stages of eggplant, with the most serious result. At the beginning of the disease, the leaves of the lower leaves produce pale yellow spots, and gradually develop to the half leaves or the whole leaves. The diseased leaves are bun during the day and recover at night. The color changes from yellow to brown, and the edges are rolled up. Finally, the whole leaves die and fall off, and the disease occurs. In severe cases, it can be developed to the whole plant. Cotton blight mainly harms fruits and can also damage leaves, stems and flowers. The fruit is infected when it is near maturity, so the fruit in the middle and lower parts is more damaged in the field. Initially, a nearly round dark brown, moist lesion appeared on the fruit. When the disease conditions were suitable, it rapidly expanded, gradually rotting the whole fruit. When the field humidity was high, the white mycelium of the mycelium was covered on the lesion. The infected leaves have obvious ring patterns, and the stems are dry and dead when the stems are seriously infected.
Second, comprehensive prevention and control: from the start of planting and planting should take appropriate preventive measures for the incidence of these two diseases, such as soaking seeds disinfection, crop rotation, cultivation of strong seedlings, rational fertilization and watering. Since these two diseases are relatively serious diseases during the growth period of eggplant, the plants are in the high temperature and rainy season at the flowering stage, and should be sprayed once every 7 to 10 days: 58% toxic myricium manganese zinc 500 Double solution or 64% anti-virus 矾 500 times solution or 40% ethyl phosphorus aluminum 300 times solution can be used alternately, which can achieve better results.
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