论文部分内容阅读
苹果黑星病是辽宁省植物检疫对象。目前主要分布于小苹果栽植区及大、小苹果混栽区,已接近辽宁南部的大苹果主产区。经自然感病和人工接种证明,大、小苹果上的黑星病菌可以交互侵染,目前一些主栽的大苹果品种均能感染此病。辽宁地区苹果黑星病的初次侵染来源是落地越冬病叶上于翌春产生的子囊孢子。分生孢子不能越冬成活。苹果枝条及芽鳞不带菌。黑星病菌的两种孢子随气流传播,使病害逐步扩大蔓延。经过6年的观察,苹果黑星病发生始期早晚及发病轻重,与早春和夏季的降水量多少成正相关。田间药剂防治试验结果,以托布津、乙磷铝、多菌灵、特克多等药剂防治效果良好。
Apple scab is the object of plant quarantine in Liaoning Province. Currently mainly distributed in small apple planting area and large and small apple mixed planting area, it is close to the main apple producing area in southern Liaoning. Natural disease and artificial inoculation proved that large and small apple black star bacteria can be interactive infection, at present some of the main apple varieties can be infected with the disease. The primary source of infection of apple scab in Liaoning is the ascospore produced in the next spring on the overwintering leaves. Conidia can not survive the winter. Apple branches and bud scales without bacteria. Two spores of the black star bacteria spread with the air flow, so that the disease gradually expanded and spread. After six years of observation, the onset and onset severity of apple scab was positively correlated with the precipitation in early spring and summer. The results of the field trials of pesticide control were well controlled by topotecan, cefotaxime, carbendazim and tectar.