Hop mold

Symptoms mainly contribute to cones. They occur in the north from July to August. The cones gradually become corrupted after being infected, and grow a layer of gray moldy material, namely the conidial stems and conidia of pathogens.

Pathogen Botrytis cinerea Pers. ex Fr. Called Botrytis cinerea, a fungus belonging to the subphylum Fungi. Morphological characteristics see sunflower gray mold.

Transmission Pathway and Invasive Conditions The northern bacteria used hyphae to overwinter on sick bodies, and a large number of conidia were produced in late spring for transmission; Southern pathogenic spores spread by air current and rain spatter for initial infection and reinfection. Field hosts exist all year round, and infestations continue to occur over a period of time without significant overwintering or late summer days. The disease is a disease in the low temperature range. The conidia have strong resistance to low temperature, and it is easy to be popular under the conditions of low temperature and high humidity. Under the conditions of warm and high humidity, the condition spreads faster.

Control methods (1) selection of disease-resistant varieties. (2) Strengthen field management to avoid low temperature and high humidity conditions. The low temperature not only weakens the plant viability, but also has a long duration of low temperature. The plant is in a state of immortality for a long time. The resistance is weak. In case of high humidity, it is easy to infect the gray mold. The basic measure of illness. (3) Reasonable watering and fertilizing, timely drainage after rain to prevent the occurrence of disease conditions. (4) If necessary, spray 50% acetaminophen WP 1500 times or 50% skeleton WP 2000 times, 65% TB WP 800 times.