The latest control methods of eggplant leaf mildew

Eggplant leaf mold is one of the common diseases of eggplant, mainly harming the leaves and fruits of eggplant. The pathogen is Fusarium oxysporum, a subphylum fungus, which is re-infected by wind and rain. The plant is too dense and the growth between plants is closed. High humidity in the field or white whitefly damage is easy to induce the disease. Let's take a look at the control methods of eggplant cotyledon mildew.

Harmful symptoms

Eggplant leaf mold mainly harms leaves, petioles and stems. At the beginning of the disease, the leaves produced white mildew spots on the back of the leaves, and then the mildew spots gradually expanded, the color was brown at first, then turned brown-black, the disease spots were nearly round to irregular, the difference between size and pressure was very large, and the front of the leaves faded slightly. When the condition is serious, the mildew layer also appears on the front of the leaf, resulting in faded green light yellow spots or plaques, and the disease spots fuse and die in the later stage.

Disease condition

The pathogen overwintered mainly with mycelium and conidia left on the ground with the disease remnant. When the climatic conditions were suitable in the next year, conidia were produced on the diseased tissue and spread through wind and rain. The conidia germinated on the surface of the host and then invaded directly from the wound or directly. The disease part produced conidia and re-infected by wind and rain. The disease can be easily induced by dense planting, closed growth among plants, high humidity in the field or damage caused by whitefly.

Prevention and cure method

1. Agricultural measures: remove the diseased and disabled bodies in time after harvest and concentrate on burying or burning them. The planting density should be suitable, and the field humidity should be reduced by timely drainage after rain. Remove the sick and disabled body in time after harvest and concentrate on burying or burning. Planting density should be suitable, drainage should be timely after rain, and attention should be paid to reducing field humidity.

2. Chemical control: at the initial stage of the disease, 50% methyl thiophanate sulfur suspension was sprayed, or 10% Shigao (oxyezole) 2000 times, or 47% plus Ruinong wettable powder 800g 1000 times, or 40% Xinxing (Fuxing) EC 8000 times, or 60% Fangmaibao 2 water-soluble powder 1000 times, once every 7 days, 2 times for 3 times.