What kind of medicine can be cured with cabbage? The price of cabbage at the beginning of the year is high, so that cabbage growers benefit a lot, cabbage black spot disease, also known as black mold. In recent years, the hazard of the disease is on the rise. Usually the autumn and winter seasons begin to occur. At the turn of winter and spring, the rainy weather increases. When the weather turns warm and humid, it is prone to outbreaks and disasters, which seriously affects the yield and quality. Chinese cabbage black spot disease mainly affects leaves, petioles and cotyledons.
The initial infection of the leaves is a near-circular chlorotic plaque, which gradually enlarges into a brown lesion with a diameter of 5-10 mm. It has obvious concentric circles, the edges are pale green to dark brown, and some lesions have a yellow halo and humidity. When it is large, a dark brown mold layer is produced, and the diseased part is perforated under high temperature and high humidity conditions.
In severe cases, the lesions merge into large plaques, causing the half-leaf or whole leaves to die, and the whole plant leaves dry from the outside to the inside. The lesions on the petiole and stem are long fusiform, with dark brown strips.
Choose suitable disease-resistant varieties for local use, and rotate with non-cruciferous crops for 2 to 3 years, deep-plowing and sun-drying, strengthening cultivation management, timely sowing, rational close planting, applying organic base fertilizer, adding phosphorus and potassium fertilizer and organic trace elements Nutrient solution to improve plant resilience.
Soak seeds with warm water of 50 °C for 25 minutes before planting, dry and then air, or use 0.4% 50% thiram wettable powder, or 75% chlorothalonil wettable powder, or 60% Baoning wettable powder. , or 50% Fumei double wettable powder dressing, or seed dressing with 0.3% of 50% chlorhexidine wettable powder.
Spray in the middle seedling stage (especially when spot is found), 40% Ethyl aluminum WP WP 200-300 times per acre, or 80% Phytotoxic WP 500 times, or 75% Quaternary WP 600 times solution, or 40% mancozeb suspension 400 times solution, or 64% cardinal WP 800 times solution, or 70% gram WP WP 700-800 times solution, Or 70% green Pu'an WP 500 times liquid 50 kg alternate spray. Once every 7 days, spray 3 to 4 times.
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