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自1986年以来,临沂市葡萄生产发展迅速,至1989年冬栽培面积已达4200亩,年产葡萄680万公斤,基本满足了当地生食,酿造的需要。但几年来的栽培实践证明,葡萄白腐病在我市发生普遍、危害严重、极易流行。据统计,1988年发病面积2700亩.占投产面积的77%,除个别地块减产20～30%外,多数减产60%以上,经济损失37万元;1989年发病面积3800亩,占投产面积的95%,一般地块减产65%左右,个别地块基本绝产,经济损失高达150万元。现将其发病流行因素及防治对策简述如下。一、病害流行因素(一)菌源数量大。该病病菌主要随病残体在葡萄枝蔓及土壤中
Since 1986, the grape production in Linyi has been developing rapidly. By the winter of 1989, the cultivation area has reached 4,200 mu with an annual output of 6.8 million kilograms of grapes, basically meeting the needs of local raw food and brewing. However, cultivation practices over the past few years have proved that grape white rot occurs in our city, causing serious harm and epidemic. According to statistics, the disease area was 2,700 mu in 1988, accounting for 77% of the area put into operation, with the exception of individual mass production reduced by 20-30%, most of the production was reduced by 60% or more and the economic loss was 370,000 yuan. In 1989, the disease area was 3800 mu, Of the 95% of the general reduction of about 65% of land mass, the basic mass of individual plots, the economic losses of up to 1.5 million yuan. Now its incidence of endemic factors and prevention and treatment outlined below. First, the disease epidemic factors (A) a large number of bacteria source. The disease mainly with the disease debris in the grape vine branches and soil