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为害情况 油茶蛀茎虫,以幼虫为害油茶树干枝,亦危害茶树,在我埸危害油茶树比较严重,被害率达20—30％(萌芽丛生10年生左右的干枝为多)。幼虫孵化后,即从侧枝嫩梢顶端的叶腋内蛀入,至侧枝与主枝相接处即沿主枝继续蛀下,每隔一定距离作一圆形小孔排泄粪便。粪便呈棕红色,分散在地面和树叶间。排泄孔随虫体的增长而扩大。上端孔小、下端孔大。孔径2—3毫米,排粪孔数,一般7—10个,最多13个。被害枝、干的直径多在8—14毫米范围内。幼虫一生蛀食长46—96厘米,平均为70厘米。蛀道宽达5毫米左右,孔道中有多数被幼虫咬而未破的孔痕。枝、干破害后逐渐枯死,每枝损失果数最少6个,最多44个。10年生左右的油茶幼林干、枝,只要10个月的时间,全被蛙
The damage Camellia stem insects to larvae damage Camellia tree stems, but also endanger the tea tree, in my 埸 endanger Camellia tree more serious, the rate of 20-30% (germination of 10 years or so dry branches as much). Larvae hatch, that is, from the axillary axils at the tip of the lateral shoots into the side branches and the main branch of the junction along the main branch continue to moth, at intervals of a circular hole for excretion. Feces were brown red, scattered between the ground and leaves. Excretion hole with the growth of parasites to expand. The upper hole is small, the lower hole is large. Aperture 2-3 mm, the number of fecal hole, usually 7-10, up to 13. Victim branches, dry diameter more in the range of 8-14 mm. Larvae borer length of life 46-96 cm, an average of 70 cm. Tunnels up to about 5 mm wide, most of the hole is bored by larvae but not broken hole marks. Branches, dry gradually damaging damage, the number of losses per at least 6, up to 44. About 10 years old Camellia young forest stems, branches, as long as 10 months time, all frogs