The disease is an important disease of leeks, and it can also harm crops such as onions and garlic. It mainly damages pseudostems and bulbs, and leaves, flowers, and roots can also be damaged. The affected area was dark green water spotted spots. When the lesions spread to half of the leaves, it was wet rot, leaves, and sag. The bulbs suffered from water-stained light brown to dark green rot at the root plate. Root victim, less root hair, brownish rot. When the humidity is high, the disease minister has a white sparse mold layer. High temperature (25~32°C) and high humidity (relative humidity above 95%) are important conditions for the disease. Continuous cropping, low-lying plots of water, and soil viscous weight are serious. Its prevention and control methods are as follows:
1, agricultural control:
Rotations; deep sorghum planting; rational drainage and irrigation; sufficient base fertilizer, the implementation of formula fertilization; pay attention to field health.
2. Chemical control:
In the early stage of disease, use 90% BDP 800x + 1000x potassium permanganate, or 58% DTX MnZn WP 500x, or 25% WP Wort 800x, or 64% anti-disease WP 600 times, or 65.5% Prokary® 800 times, or 69% Ank manganese + 75% chlorothalonil (1:1) 1000 times, interval 7-10 days 1 Times, spray 2 or 3 times according to the condition.
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