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1996 年8 月底在宁夏对光肩星天牛危害导致枯梢的箭杆杨的解剖结果表明,解剖前调查的各种以危害状反映的天牛表征数量与解剖后的天牛实际数量并不一致.因有空刻槽,解剖前当年新刻槽数大于解剖后卵及初孵幼虫的数量,空槽率为42-7 % ;解剖前当年新排粪孔数因有的天牛幼虫向树体外排粪的表征不甚明显而偏少;当年新羽化孔数解剖前后差别不大.导致箭杆杨枯梢的主要原因是树干上天牛坑道过多且集中,其坑道截面积占树干截面积的10 % 左右,影响了树体向上的水分传导.在水肥条件良好且无其它病虫害的情况下,天牛传入后3 a 即可使箭杆杨枯梢.导致8 年生箭杆杨枯梢时的光肩星天牛危害的主要数量指标为:株平均当年新羽化孔数10 个.
At the end of August, 1996, the anatomical results of Arrowhead Poplar in Shijiazhuang, China, which harmed the Shoots of Anoplophora glabripennis in Ningxia, showed that the numbers of dendrochemis horns reflected in the deformities and the actual numbers of Anopheles were not consistent after investigation. Due to the emptying of the groove, the number of new grooves in the year before dissection was larger than that of the eggs and newly hatched larvae. The emptying rate was 42-7% The characteristics of defecation were not obvious and less than normal; when the number of new eclosion holes was not different before and after dissection. The main reason leading to arrow stem shoots is that too much and concentrated on the trunk of the Tianniu tunnel, the tunnel cross-sectional area of about 10% of the cross-sectional area of the trunk, affecting the tree upward moisture conduction. Good conditions in the water and fertilizer and no other pests and diseases, after the introduction of Celastrus 3 a arrowhead shoots. The main quantitative indexes that led to the damage of Anoplophora glabripennis in 8-year-old arrow shoots were as follows: the number of new emergence holes in the year was 10.