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茶黄萎病(Verticillium sp.)是真菌性土传病害,病菌侵入茶树根部,并阻塞维管束,造成茶树萎叶。受害茶树的芽叶萌发缓慢、瘦弱,叶黄萎蔫,后期整株叶片脱落,光杆焦枯;地下根皮变红褐色,不粘土。根部的木质部先呈水渍状,后转褐色枯死,在湿度较大的情况下,出现白色的霉状物(菌丝)。经1983—1985年连续观察,7月中旬开始出现黄叶,7月底至8月上旬为萎叶高峰,8月下旬至9月,枝秆干枯。自1974—1985年我场因此病有70余亩茶树死亡,占茶园面积5％,每年损失鲜茶5万多斤占产量的6.2％。
Verticillium sp. Is a fungal soil-borne disease in which the germs invade the roots of tea trees and block the vascular bundles, causing the tea leaves to wilt. Buds of tea trees suffer from germination slow, thin, yellow leaves wilting, the latter off the whole plant leaves, light pole scorched; underground bark turn reddish-brown, non-clay. The roots of the xylem was first water-like, then turn brown dead, in the case of humidity, white moldy (mycelium). After continuous observation from 1983 to 1985, yellow leaf began to appear in mid-July, the peak of betel leaf from the end of July to early August, late August to September, dry branches. Since 1974-1985, I have died of more than 70 acres of tea trees, accounting for 5% of the tea plantation area. Each year, more than 50,000 kilograms of fresh tea are lost, accounting for 6.2% of the total output.