Garlic leaf blight
First, the symptoms: mainly harmful leaves or pedicels. The leaf infection usually starts from the tip of the leaf or other parts of the leaf. The initial white flower dots expand into an irregular shape or an elliptical gray-white or gray-brown lesion, which produces black mold on the surface. In severe cases, the diseased leaves die. The peduncle is easily broken from the diseased part, and finally many small black spots are scattered in the diseased part. Do not convulse when it is serious.
Second, the incidence factors: mainly mycelium or ascospores with the diseased remains in the soil overwintering, the first year of sporadic spores caused by the first infestation, the latter part of the disease to produce conidia for reinfection. This strain is a weak parasitic bacterium, often accompanied by a mixture of downy mildew or purple spot.
Third, prevention measures:
(1) Remove the damaged leaves and peduncle in time. (2) Strengthen field management, rational close planting, timely drainage after rain, and improve host disease resistance. (3) Spraying 75% chlorothalonil WP 600 times solution, or 50% chlorhexidine WP 1500 times solution, 64% antivirus WP 1500 times solution, 50% succinic acid acid at the beginning of the disease Copper wettable powder 500 times liquid, 60% succinylphosphine aluminum wettable powder 500 times liquid, 14% lycopene copper water 300 times liquid, 1:1: 100 Bordeaux liquid, every 7 to 10 days, continuous Prevention and control 3-4 times.
Fire Retardant Panel,Waterproof Board,Prepainted Calcium Silicate Board,Uv Fireproof Board
Jiangmen Feifan Industrial Co.,Ltd , https://www.cementboard.net