Gray mold and its control
As a common indoor leaf-viewing plant, hanging bamboo plum is favored by gardening enthusiasts for its unique striped leaves. However, during the maintenance process, gray mold is often invaded by gray mold. This fungal disease caused by Botrytis cinerea not only affects the ornamental value, but may also cause plant death. This paper will analyze the disease characteristics, incidence patterns and systematic prevention and control plans through three-dimensional analysis. Analysis of the pathogenesis of gray mold of hanging bamboo plum at the beginning of the identification characteristics of typical diseases, water-stained transparent spots appeared on the leaves at the beginning, and expanded to yellow-brown spots within 48 hours. The course of the disease progresses to the middle stage, and the diameter of the lesion can reach 2- 3 cm, and the edges show wavy black-brown halos. Grayish-white mold layers (conidial stalks and spores) can be seen on the back of the leaves during severe infection, and the density of the mold layers increases significantly when humidity is>85%. Pathogen transmission characteristics Botrytis cinerea overwinters in the soil in the form of sclerotia, and the conidia can travel up to 200 meters through airflow. Experimental data show that: the temperature is 15-25℃, the relative humidity is more than 90% for more than 6 hours, and the spore germination rate can reach 78%. Dewing condensation on leaves caused by the temperature difference between day and night in spring and autumn is a key factor in inducing infection. Comprehensive strategy for preventing and controlling gray mold of hanging bamboo plum. Environmental control and preventive measures Keep the distance between plants>30cm to ensure air circulation, and use a hygrometer to monitor the environmental humidity (it is recommended to maintain 55-70%). Use the bottom dipping basin method for watering to avoid residual water droplets on the leaves. The use of circulating fans during the winter heating period and ventilation for 10 minutes every 2 hours can reduce the incidence rate by 42%. Technical parameters for chemical control were used in the early stage of the disease with a solution of 80 times 50% Mimeiling wettable powder (dilution ratio of 1:80), focusing on spraying on the back of the leaves, and the application interval was 7 days. It is recommended to alternately use 28% grimefaction (1:800) and 40% pyrimethanil suspension (1:1000) for severely ill plants. Combined with a synergist, the adhesion rate of the drug solution can be increased by 35%.
By establishing a trinity prevention and control system of "environmental monitoring-physical prevention-chemical control", the transmission chain of gray mold can be effectively blocked. Regularly check the condition of leaf surfaces and isolate and treat diseased leaves immediately. It is recommended to use the biological agent Bacillus subtilis for soil improvement every quarter to continuously maintain plant health.