How should geranium spot disease be prevented and treated?
Prevention and control of spot disease of geranium: first, when planting in a small area, remove the diseased leaves manually and burn them centrally. Second, improve the planting environment. Crop rotation should be carried out in areas with serious disease, and the planting density should not be too dense, so as to facilitate ventilation and light transmission, and eliminate stagnant water in time. Third, during the onset of the disease, spray with 100 to 150 times Bordeaux solution or 1000 times of 80% dimethane wettable powder, or spray 50% methyl topiramate with 1000 times of methyl topiramine, or spray with a mixture of 45% chlorothalonil and carbendazim 1000 times than that of a single drug.
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Artificial Creation of Cultivation Conditions for Rational Utilization of Flower Mushroom
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Prevention and treatment of spot disease of pelargonium
The main symptoms are damaging leaves, primary waterlogged spots, and then round, 2-3 mm in diameter, slightly sunken in the center, with a small brown center and a spreading edge around the yellow. The old spot can be up to 6-10 mm in diameter and is irregular, dark brown, with concentric lines and less light black mildew layer due to the limitation of leaf veins. Disease spots on the leaves can converge with each other for a long time, often making the leaves black, wrinkled and withered. The condition of the disease mainly occurs in the older and weak tissue, so it is more common in the lower old lobe. Overcast and rainy
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