论文部分内容阅读
甜柿虫害比较多,种植头1~2年病害较轻,但随着树龄增加,病害也从轻到重,要注意加强防治。柿角斑病。主要为害叶片,也为害柿蒂。叶片发病初期,病斑正面黄绿色,斑内叶脉黑色,病斑边缘较模糊,形状不规则。8月初前后发病,9月份病斑颜色逐渐加深,呈黑褐或黑色病斑;病斑发展受叶脉限制,定形病斑呈多角形。后期病斑上密生黑色、绒球状小点,引起叶片大量脱落。柿蒂病斑发生在四角上,淡褐至深褐色,有时有黑色边缘,形状不定,两面均可产
Sweet persimmon pests are more, the first 1 to 2 years of planting less disease, but as the age increases, the disease also light to heavy, we should pay attention to strengthening prevention and control. Persimmon corner disease. The main damage to the leaves, but also harmful persimmon pedicle. The early onset of leaves, lesions positive yellowish green, black spots within the veins, lesion edge fuzzy, irregular shape. The onset of early August and early September, September lesion color gradually deepened, dark brown or black lesions; lesion is limited by the veins, shaped lesions were polygonal. Late lesions on the dense black, pompom-shaped dots, causing a large number of leaves off. Persimmon disease spots occur in the corners, light brown to dark brown, sometimes with black edges, indefinite shape, both sides can produce