The Prevention and Control of Leaf Blight of Eggplant
Eggplant leaf mold [Fuivia fuiva (Cooke) Cif.] Occurs on eggplants in protected areas in the north, and the damage is increasing.
[Field identification] mainly damages the leaves. Onset of the leaves, chlorotic spots with indistinct edges were found at the beginning, and the olive green-green velvety mildew layer was densely formed on the back of the lesions. In severe cases, the leaves covered with lesions caused the diseased leaves to dry and fall off. Occasionally it can also damage the fruit, the yellow part of the disease subsidence, then turn dark brown, leather stiffness.
[Causes of morbidity] The pathogens overwinter on the ground with mycelium and conidia with the diseased body. The pathogen spreads in the fields through the wind and rain, and invades the wound and can penetrate directly into the epidermis. The bacteria re-infested frequently in the field, and the conditions were suitable for the disease to develop rapidly. It takes only about 10 days from the onset to the onset of the whole field. The optimum temperature for pathogenic development is 20-23°C, which requires more than 85% relative humidity.
[Points for Prevention and Control] 1 Cultivation of mulching film. The density of colonization cannot be too dense. 2 Early pruning. In the middle and late period, the old leaves of the lower part are removed timely to improve the ventilation and light transmission conditions between the plants. 3 Control greenhouse temperature and humidity for ecological control. 4 Reasonable fertilization, avoid partial application, excessive nitrogen fertilizer. Appropriately control irrigation, strengthen ventilation and eliminate moisture. Reduce the time for leaf condensation. 5 Films are used without drip film. Take care to remove dust on the membrane in time. 6 timely removal of diseased leaves. After the harvest, the diseased bodies were promptly removed and buried or burned. 7 chemical control can be used anti-mildew treasure 800 times solution, or Garrett 800 times, or 80% spray grams 500 times, or 50% polymyxin 600 times, or 40% Nova 9000 times.
[Field identification] mainly damages the leaves. Onset of the leaves, chlorotic spots with indistinct edges were found at the beginning, and the olive green-green velvety mildew layer was densely formed on the back of the lesions. In severe cases, the leaves covered with lesions caused the diseased leaves to dry and fall off. Occasionally it can also damage the fruit, the yellow part of the disease subsidence, then turn dark brown, leather stiffness.
[Causes of morbidity] The pathogens overwinter on the ground with mycelium and conidia with the diseased body. The pathogen spreads in the fields through the wind and rain, and invades the wound and can penetrate directly into the epidermis. The bacteria re-infested frequently in the field, and the conditions were suitable for the disease to develop rapidly. It takes only about 10 days from the onset to the onset of the whole field. The optimum temperature for pathogenic development is 20-23°C, which requires more than 85% relative humidity.
[Points for Prevention and Control] 1 Cultivation of mulching film. The density of colonization cannot be too dense. 2 Early pruning. In the middle and late period, the old leaves of the lower part are removed timely to improve the ventilation and light transmission conditions between the plants. 3 Control greenhouse temperature and humidity for ecological control. 4 Reasonable fertilization, avoid partial application, excessive nitrogen fertilizer. Appropriately control irrigation, strengthen ventilation and eliminate moisture. Reduce the time for leaf condensation. 5 Films are used without drip film. Take care to remove dust on the membrane in time. 6 timely removal of diseased leaves. After the harvest, the diseased bodies were promptly removed and buried or burned. 7 chemical control can be used anti-mildew treasure 800 times solution, or Garrett 800 times, or 80% spray grams 500 times, or 50% polymyxin 600 times, or 40% Nova 9000 times.
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