Diseases and prevention methods of white chrysanthemum

Chrysanthemum leaf spot

Leaf 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 rust

Rust 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 wilt

Fusarium 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.