Prevention and treatment of common diseases of orchids

1. Anthracnose is most likely to occur in the whole growth process of orchids, but it is the most serious in plum rain season, and temperature and humidity are important factors affecting the disease. Plants and plant materials carry pathogens, poor ventilation and lighting conditions, intensive fertilization and extensive cultivation and management. is the cause of the disease and the aggravation of the disease.

The pathogen overwintered on the diseased plant with conidia and mycelium. After germinating in the second year, the pathogen invaded the seedlings, and then produced a large number of bacteria on the diseased plant, which spread with wind, rain and insects, and invaded the stems and leaves again. After the seedlings were damaged, reddish-brown spots occurred in the leaves and stems, and when serious, the diseased part blackened and withered. (Chen Jisheng)