Identification and prevention of Botrytis cinerea

Cattleya gray mold symptoms

The virus occurs on Cattleya flowers. At first, small water-like spots will form on the petals and rhizomes. Generally, the spots will stop developing, but in a high temperature environment, the spots will gradually expand. In severe cases, water-soaked brown rot will occur, and a gray mold layer can form on the diseased parts in the greenhouse.

Cattleya gray mold control methods

When cultivating Cattleya, pay attention to ventilation, increase light, and add water and fertilizer, but do not apply too much water and fertilizer. Once flowers are found to be infected with the bacteria, they need to be immediately pruned off, the infected plants must be isolated or burned, and other healthy plants must be preventively disinfected.

When the disease occurs, you can spray 1000 times of 50% carbendazim solution and 1000 times of 50% cypermethrin solution, and change them every 7 days. If you use it continuously for about 1 month, the effect will be better. You can also use 800 times solution of 65% Mancozeb wettable powder, 1000 times solution of 70% thiophanate-methyl wettable powder, or 800 times solution of 75% thiophanate-methyl for spraying for prevention and control.