How to control eggplant rot in high temperature and humidity in summer

Hot and humid in summer, eggplant is easy to rot, which is caused by cotton blight, brown streak and gray mold.

Eggplant rot

The so-called "falling eggs" and "rotten eggplant" are continuous blight. After the eggplant was infected by this disease, the water-immersed round spots appeared at first, and in the later stage, the eggplant meat became black and brown, rotted and smelly; when the humidity was high, the disease of eggplant grew white mildew layer. To prevent and cure this disease, it is necessary to strengthen cultivation management and avoid high temperature and humidity, such as reasonable pruning; after eggplant harvest, remove the lower old and diseased leaves of eggplant in time; after rainstorm, drain stagnant water and irrigate well water in time to reduce ground temperature and prevent damp and hot gas fumigation of eggplant. At the same time, chemical control can be used to spray 64% poison alum wettable powder 500 times liquid, or 72.2% Pulic water agent 800 times liquid, and so on. Drugs are used alternately to avoid drug resistance.

Brown streak of eggplant: for example, the disease spot on eggplant is round or oval, sunken and arranged into a round pattern, the leaves of eggplant have water-immersed round spots, the center of the spot is light, there are many concentric round black spots, and there are prismatic disease spots on the stems. the edge of the spot is dark purple-brown. When the disease is serious, eggplant is covered with disease spots and connected to each other, when the weather is wet, the diseased fruit is easy to rot, or dry shrinks into a stiff fruit, but does not fall off. In order to prevent and cure the disease, one is to hoe, prune and branch in time to increase the ventilation and light transmittance of eggplant; the second is to increase the application of phosphorus and potassium fertilizer to make eggplant grow and grow early and raise the harvest time of eggplant to before the epidemic of the disease; third, agricultural operations should choose sunny days to avoid pruning, vine binding and harvest on cloudy days. Fourth, at the initial stage of the disease, 58% metalaxyl ·manganese-zinc wettable powder, 64% poison alum, 1500 times high water dispersible granule, or 80% Dasheng wettable powder were sprayed once in 7 days and 4 times in a row.

Botrytis cinerea of eggplant: the disease occurs in the leaves at the adult stage, and the leaf margin extends inward and in the shape of "V". The lesion is waterlogged at first, the edge is irregular, and then it is light brown to yellowish brown. The infected petals and cores fall on the leaves or branches of eggplant, forming round or fusiform disease spots. There are shallow wheel lines on the disease spot. After the diseased leaves have dried up, there is a grayish-brown mildew layer in high humidity. Eggplant disease, mostly in the fruiting period, harm door eggplant, pair eggplant, in the young fruit top or pedicel around the formation of finger belly-sized brown watery spots. The disease is sunken and rotten, dark brown, with a black mildew layer. When eggplant is dipped in flowers, 0.1% of 50% Sukeling wettable powder can be added to the growth stimulating hormone to prevent the occurrence of the disease; if it has already occurred, it can be sprayed with 2000 times of 50% Sukeling wettable powder, 1500 times of 50% prohydantoin wettable powder or 60% anti-mildew wettable ultrafine powder spray. Diseased fruits, diseased leaves and lateral branches were removed, burned and buried deeply.