How to prevent and control bacterial flower rot? These methods you need to know

Distribution: worldwide. Pathogens: Pseudomonas aeruginosa, Pseudomonas fluorescens. Hosts: mainly cultivated varieties of Cattleya, Cymbidium and Paphiopedilumcultivatedvarieties. Symptoms: rot spots appear on flowers, including some small, necrotic lesions with water-soaked halos. It may first infect the soil, then the roots and stems, causing necrosis and rot, including buds and flowers. Control: Pseudomonas species are saprophytes, but they can also infect already damaged tissues, so the first step is to replace the growing medium or sterilize it strictly. The second is to cut off the infected parts and soak the infected plants in a 0.1% potassium permanganate solution. The soil can be sterilized with high temperature. In addition, spraying with 200 mg/L agricultural streptomycin and 0.5% Bordeaux mixture also has a certain effect. (Chen Xinqi, Ji Zhanhe)