Tips for Preventing and Treating Orchid Leaf Spot and Common Physiological Diseases

Orchid leaf spot is a fungal disease that harms the leaves and can occur throughout the entire growing period. High temperature and high humidity, damage by scale insects, which mainly parasitize the stems and leaves of orchids, and poor ventilation all make leaf spot disease likely to occur. You can use Gentongtong capsules combined with dichlorvos emulsifiable concentrate at 1000 times dilution to drench the roots.

In the early stage of leaf spot disease, the lesions are brown; after expanding, the lesions become long oval to long strip-shaped spots, with red-brown edges and gray-brown interiors. In the later stage, black granular bodies are scattered on the lesions. The key is to improve ventilation conditions and use Hushu Jiangjun to eliminate pests. In the early stage of the disease, spray with new high-fat film at 500 times dilution, or 50% Tuzet at 1000 times dilution and 65% zineb at 800 times dilution for control. (Xiaocao)