果梢斑螟生物学特性的研究

果梢斑螟(Dioryctria pryeriRagonot)是蛀食类害虫,以幼虫危害红松当年生球果和先年生球果及嫩梢。在吉林省抚松县露水河林业局该虫1 a发生1代,以3~4龄幼虫在球果内、果痕处及嫩梢内越冬。翌年5月开始活动危害,5月末至6月下旬为蛹期。6月中旬始现成虫羽化,终见于7月上旬。6月中旬至7月上旬为卵期,6月末至7月中旬幼虫孵化,部分幼虫在球果采摘前转移至果痕附近、嫩梢、当年生球果内继续危害,于9月下旬进入越冬状态。

Study on biological characteristics of Dioryctria pryeri

Dioryctria pryer, as a borer with its larva made damage to tender shoot and annual cone of Pinus koraiensis, which has one generation a year at Lushuihe Forestry Bureau of Jilin Province, China. Its larvae in 3 - 4 instars overwinter for themselves in the cones, plucked traces and tender shoots, begin to damage from the fifth month of second year and pupation stage at end of the May to last ten-day of the June, end eelosion of imagines appear in middle of the June to first ten days of the July, same time to the egg stage. After incubation in end of the .June to the middle of July, parts of the larvae begin to damage then turn into overwintering.