Characteristics and control methods of gray leaf spot of garlic
The main results are as follows: (1) the symptom characteristics mainly harm the leaves. The disease spot is long oval, light brown at first, then gray-white, fine gray-black mildew on both sides of the leaf, and when the disease spot is serious, the disease spot converges, resulting in local death of the leaf. The sun is warm and the night is cool, and the foggy and dewy weather is serious. (2) ① was used to remove the injured leaves in time. ② should strengthen field management, reasonable close planting, timely drainage after rain, and improve host disease resistance. At the initial stage of the disease, ③ was sprayed with 75% chlorothalonil wettable powder 1500 times, 50% prohydantoin wettable powder 1500 times, 64% alum wettable powder 500x, 60% ethyl phosphate name wettable powder 500x or 1 ∶ 1 Bordeaux solution, taking turns every 7 to 10 days for 3 times in a row. Pay attention to the harvest and listing after the pesticide interval.
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Symptoms, prevention and treatment of garlic deficiency
The main results are as follows: (1) although the watered garlic leaves have strong drought tolerance, the root system is shallow and the absorption capacity is weak, so garlic requires higher soil moisture, and different growth periods have different requirements for soil moisture. After sowing to maintain a high soil moisture, such as drought, should be watered in advance, in order to achieve suitable soil moisture sowing. One day before winter.
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Occurrence regularity and control methods of garlic root maggots
Root maggot is a general term for the larval stage of Diptera pests that damage crops such as garlic. In recent years, the occurrence of garlic root maggots is increasing year by year. The damage caused by root maggots can reduce the yield of garlic and have a great impact on the quality of garlic, and the economic loss is serious when the damage is serious. Garlic root maggots (larvae) generally gather in the garlic root and.
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