Chrysanthemum leaf spotLeaf spot is a fungal disease that can occur throughout the year, and is more serious in the warm and humid season from May to October . When the disease occurs, yellow-brown spots appear on the leaves, which gradually expand and cause the entire plant to wilt. Prevention and treatment methods ① Clean up dead branches and leaves in time, remove diseased leaves in time, and burn them in batches. ② In the early stage of the disease, spray with 800-1000 times diluted 70% thiophanate- methyl . During the disease period, spray alternately with 800-1000 times diluted 50% carbendazim or 75% thiophanate - methyl . Spray 3-4 times after 7 days. Chrysanthemum rustRust disease mainly harms the stems and leaves of white crystal chrysanthemum, causing rust spots to appear. The disease is more serious in rainy weather from April to May . Prevention and treatment methods ① Remove diseased plants and remove diseased leaves in time. ② Before the disease occurs, spray regularly with 500-700 times diluted 80% Mancozeb; during the disease period , spray with 800-1000 times diluted 15% Triadimefon or 1200-1500 times diluted 25% , spray 3-4 times after 7-10 days. Fusarium wiltFusarium wilt is a fungal disease that causes the stems and leaves to wilt. The disease is more serious during the hot summer and heavy rains. Prevention and treatment methods ① Remove diseased plants promptly. ② During the disease period, spray alternately with 800 times diluted 50% mancozeb emulsion, 400 times diluted 50% carbendazim, or 700-1000 times diluted 75 % thiophanate-methyl, spray 3-4 times after 7 days. |
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