Prevention and Treatment Methods for Philodendron Blight
A detailed introduction about the prevention and treatment methods for Philodendron blight, let's follow the editor to see the specific content!
Philodendron Blight Symptoms
Under conditions of high temperature and humidity for an extended period or consecutive days of continuous rain, Philodendron is highly susceptible to blight. Initially, infected leaves show water-soaked brown rot and produce a large amount of mycelium, causing leaves to stick together. Under high humidity, a large number of conidia are produced for infection, presenting grayish-white or light brown cobweb-like mycelium and branched conidiophores with round terminal cells and clustering grayish ovoid conidia. Stems and petioles often show withered or dark brown sunken spots when infected. When the infection covers the entire petiole, the affected area is covered with gray mold spores after rain or when humidity is high; when the tissue rots, the epidermis cracks, and the diseased tissue shrinks, with black flat sclerotia produced on the surface or inside.
Philodendron Blight Occurrence Pattern
The pathogen of Philodendron blight overwinters in the form of mycelium, conidia, and sclerotia attached to diseased residues or fallen in the soil. The overwintering conidia and conidia from other hosts are spread by air currents, rain, and irrigation. The disease is prone to occur when relative humidity is above 93%, low temperature, continuous rainy weather, or when the maintenance environment is low in temperature and humidity for an extended period.
Philodendron Blight Control Methods
① Careful maintenance. The optimal growth temperature for Philodendron is 18-25°C, and it must be higher than 5°C in winter. Apply sufficient bottom fertilizer when repotting, or use decomposed leaf soil, and apply some nitrogen fertilizer during the growing season. Sprinkle water on the leaves appropriately during regular maintenance, and control watering in winter.
② When gray mold is detected, promptly cut off the diseased leaves, lower the temperature of the maintenance environment, and then spray 800 times the concentration of 50% gray mold spirit wettable powder or 100 times the concentration of 50-speed killer wettable powder, 600-700 times the concentration of 28% gray mold control wettable powder, 800-1000 times the concentration of 30% powerful water suspension, 800 times the concentration of 25% Shibaike emulsion, or 1200 times the concentration of 40% Shijiale suspension.
The above is an introduction to the methods for preventing and treating Philodendron blight, provided as a reference suggestion for everyone.