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一、危害松梢螟(Dioryctria splendidella H.S.)以幼虫危害油松、樟子松等的主梢和侧梢。受害梢顶端枯死变黄,主梢受害不能向上生长,在受害处的下部丛生一轮侧枝,以后,由侧枝代替主梢继续向上生长,形成干材弯曲,如连续受害不仅影响生长量,而且干材多次弯曲,也严重地影响木材的工艺价值。除危害嫩梢外,还危害球果,使种子产量降低。
First, endangered pine borer (Dioryctria splendidella H.S.) larvae endanger pine, Pinus sylvestris and other main shoots and lateral shoots. By the top of the victim dead yellow, the main shoot victims can not grow upward in the victims of the lower part of a cluster of lateral branches later by the side branches instead of the main shoot to continue upward growth, the formation of dry material bending, such as continuous damage not only affects the amount of growth, and dry Material repeatedly bent, but also seriously affect the value of wood craft. In addition to endanger the young shoots, but also endanger the cones, so that seed yield decreased.