First, the main symptoms
The lesions on the diseased leaves are irregular or near-circular, and the diseased and healthy tissues are clearly demarcated. The lesions are yellow-green on the edge, central brown or dark brown, dense black particles on the lesions, small particles buried or semi-buried, petioles Formed on the black-brown slightly sloping irregular shaped lesions, scattered small black particles on the lesion, the disease is serious, the leaves covered with lesions or lesions connected, resulting in early yellow leaves withered.
Second, the characteristics of the disease
The pathogenic bacteria are transmitted through wind and rain and irrigation water and invade through the stomata or penetrate the epidermis. Diseases are frequently infested and develop rapidly. The pathogens are very warm and wet, especially in the case of extensive management and debilitating disease.
Third, control methods
At the beginning of onset, 70% Mancozeb Zinc WP can be used 500 times, 80% Xinwansheng WP 600 times, and 77% can kill WP 800 times or 1:1:200 Bordeaux mixture. 50 ~ 60 kg alternating spray, and adding a new amount of high fat film, can prevent pests produce drug resistance, enhance efficacy, spray every 7 to 10 days, and even spray 2 to 3 times.
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
Foot Spa Machine,Foot Tub Spa Pedicure,Foot Bath Massager,Bubble Foot Spa
Huaian Mimir Electric Appliance Co., LTD , https://www.mimirfootspa.com