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无花果在我们浦东新区大面积种植已有3年的历史了,随着树龄的增加,各种病虫的发生和为害也逐年加重,在为害无花果的天牛中尤以桑天牛为害为重,占90％以上。据1995年10月份对无花果种植户的抽样调查表明:三年生无花果树的天牛自然钻蛀率平均为46.78％,有些重发地区钻蛀率高达77.42％,钻蛀孔一般每棵在2个以上,最多的可达7～8个。果树经天牛钻蛀为害后,轻者造成树势减弱,树枝易折断,重者整株死亡绝收,严重影响无花果的正常生长。经过两年的调查和研究,对于桑天牛的发生规律和为害特点有了初步了解,摸索了一套
Fig in our Pudong New Area has a large area of three years of history, with the increase of age, the occurrence of various diseases and pests and pests also increased year by year, in the harm of fig-day beetle, especially mulberry trap damage, Accounting for more than 90%. According to a sample survey of fig growers in October 1995, the average rate of natural moth-cutting of perennial fig-tree was 46.78%, while that of some resending areas was as high as 77.42%. The number of moth holes was generally 2 Above, the most up to 7 ~ 8. After the damage caused by decadent deciduous trees, the light caused by the weakening of the tree, the branches easily broken, heavy death of the whole plant absolutely bad, seriously affecting the normal growth of the fig. After two years of investigation and research, we have got a preliminary understanding of the occurrence and damage characteristics of Morinda cinerea,