The leek disease is a fungal disease caused by P. infestans infection. Once the disease occurs, the disease is rapidly spread and the disease spreads quickly. When it is serious, it will destroy the whole field and cause serious economic losses to the vegetable farmers. Epiphyseal and pathogenic parts of leek plants can be affected, especially pseudostems and bulbs. The disease is caused by wind and rain, irrigation water, and shed film dripping water, causing reinfection. The optimum temperature for pathogenic disease is 25°C~32°C, and the relative humidity is above 90%. During the cultivation of roots in the open field, the leeks are severely affected when there is heavy rain or rainfall. During the period of raising the roots in the open field, agricultural control shall promptly remove accumulated water in case of precipitation, and ventilate and dampen. Fertilizer should be careful not to excessively apply nitrogen fertilizer, and the planting density should not be too large, so as to avoid the delicate leek plants and poor disease resistance. When watering, it is necessary to pour small water and prevent flooding. Shed room should be ventilated and dampened in time. The medicine should be sprayed in the early stage of disease prevention. The medicine can be used 25% metalaxyl WP 750 times, or 58% metalaxyl MnZn WP 500 times, or 64% antivirus WP 400 times. , Or 77% can kill WP 500 times, or 80% WP WP 600 times, or 90% EVDS WP 700 times. Once every 7 days, spray 2~3 times. Can also be used 500 ~ 1000 times copper sulfate, 25% metalaxyl wettable powder 1000 times Irrigation. Fleece Gloves,Fleece Mittens,Ladies Fleece Gloves,Wool Mittens With Fleece Lining HOLIK ASIA GROUP CO.LTD , https://www.holikasia.com
Shed leeks guard against epidemics