How to prevent ginger spot disease

Ginger is a common stem and vegetable condiment in life, which can enhance people's appetite for food. The occurrence of spot disease has led to a decline in the yield and quality of Ginger. This article will introduce the prevention and treatment methods of Ginger Spot Disease in detail.

Symptoms: The disease mainly affects the leaves, and the lesions are small. The surface of the leaves is water-stained at the beginning of the disease. The front surface is yellow-white, prismatic or oblong, 2-5 mm long. The central part of the lesion is easily broken or perforated. The disease spots are dense, affecting photosynthesis, the plant growth is weakened or stopped growing, and the disease center is obvious.

Pathogens and causes: The disease is caused by the infection of ginger spotted mold. In mid-August, the central disease plant was seen, and then spread to the whole field. The mid-to-late September was the epidemic period, and the end period was in late October. During this period, the average daily temperature was high, the temperature reached 30 °C or above, and the lowest temperature was around 20 °C. The highest temperature in the year; the large rainfall is the most concentrated period of precipitation throughout the year. High temperature and high humidity are the main causes of this disease. And in August and September, there were more rainy days, which was conducive to the spread of ginger spotted disease by rainwater spatter. In addition, the ginger land is relatively fixed, planted in successive years, and a large number of bacteria sources are accumulated in the soil; the fertilizer is single, the nitrogen fertilizer input is too much, the phosphorus and potassium fertilizer application is less, and the weak disease resistance of the plant is also an important factor in the occurrence of this disease.

The early and late occurrence of ginger scab is related to the morning and evening of the flood season. The flood season came early, and ginger spot disease occurred early.

Control methods; conditional should avoid continuous cropping, increase the application of organic fertilizer and phosphorus and potassium fertilizer, strengthen the cultivation of healthy seedlings, and improve the disease resistance of plants. Do a good job in field investigation and early detection of diseased plants. In the early stage of the disease, use 70% thiophanate-methyl WP and 75% chlorothalonil WP to mix 600 times or 30% azoxystrobin 1000 times, 25%. Mishida suspension 1500 times solution, or 30% Ai Miao (benz * propiconazole) EC 4000---5000 times solution, 500 times spray of allicin, 50 kg per mu, focus on the disease center Spray, spray once every 6-7 days, continuous control 3-4 times, the control effect is more than 80%.

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