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1症状特点枸杞灰斑病主要危害枸杞叶片,果实亦可受侵害。叶片病斑圆形或近圆形,较细小,长径2~4mm不等,斑边缘褐色,发病后健康部位分界明晰,中部灰褐色至灰白色,斑面病征表现为暗灰色霉(病菌分孢梗与分生孢子),以叶背斑面为明显。果实染病,症状与叶片相似,惟褐色斑点有时稍下陷。2病原及发病特点枸杞灰斑病由半知菌亚门的枸杞尾孢菌(Cercospora lycii Ell.et Halst.)侵染引起,病菌以菌丝体和分孢梗在病株上或随病残体遗落在土中越冬,或以分生孢子粘附在果实种子上越冬,以分生孢子作为初侵与再侵接种体,通过风雨传播,从寄生表皮侵入致病。高湿多雨的年份有利于发病。植地低洼潮湿,土壤缺肥或肥水管理不善致植株生长不良,或偏施氮肥植株生长过旺,皆易降
1 Symptoms of Chinese wolfberry gray spot main hazard wolfberry leaves, fruit can also be infringed. Leaf spot is round or nearly round, small, long diameter 2 ~ 4mm range, brown spot edge, after the onset of a clear boundary of health, the central gray-brown to gray white, gray spot disease characterized by dark gray mold Stems and conidia), to the leaf back spot is obvious. The fruit is infected with symptoms similar to the leaves, but brown spots sometimes sag. 2 pathogen and disease characteristics Wolfberry gray spot by the penicillium subfamily Cercospora lycii Ell.et Halst.) Caused by infection with mycelium and spores on the diseased plants or with disease Body left in the soil overwintering, or the conidia attached to fruit seeds in the winter, with conidia as the initial invasion and re-invasion inoculum, spread by wind and rain, invasion from parasitic epidermis pathogenic. High wet and rainy year is conducive to the incidence. Lowland wetlands, lack of fertilizer or manure management of poor water plant poor growth, or partial nitrogen fertilizer plants over-growth, are easy to fall