How can flower black spot be prevented and controlled effectively?

How is flower black spot prevented and controlled effectively.

When growing flowers, disease prevention and control is a step that cannot be skipped, and the occurrence of black spot brings major harm to flowers.

To prevent and control black spot, we can spray 50% carbendazim wettable powder 1000 times dilution early, and at the same time strengthen management, apply more phosphorus and potassium fertilizer, and improve the plant's disease resistance. To prevent and control anthracnose, spray 120-160 times Bordeaux mixture of equal amounts or zineb wettable powder 1000 times dilution.

Friends who like growing flowers should take note: flower black spot must be prevented in advance.

1. First, start from the source of infection, promptly sweep up fallen leaves and remove diseased leaves. In winter, pruning of severely diseased plants should be strengthened, and the overwintering pathogens on diseased branches and diseased leaves should be removed as well.

2. Do not arrange potted plants too densely. Placing them directly on the ground easily makes the potting soil too wet because of water accumulation on the ground, so it is best to place them on stepped plant stands. Change the watering method and time, water slowly along the edge of the pot rather than spraying frequently. Never water at night, because moist leaves make it easier for pathogens to invade.

3. When using chemical treatment, start spraying when new leaves first unfold in summer, usually once every 7-10 days. The chemicals can be chosen from chlorothalonil wettable powder 500 times dilution (75%) or carbendazim wettable powder 500-1000 times dilution (50%), or zineb wettable powder 500 times dilution (80%) or Bordeaux mixture (1:1:100) or thiophanate-methyl 1000-1200 times dilution (70%).