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1986年5月中旬,我们进行了飞机低容量喷洒灭幼脲Ⅲ号胶悬剂防治侧柏毒蛾试验,面积813.3公顷,取得了较好的效果,为今后大面积防治森林害虫找到了有效途径。现将结果分述如下。一、试验林概况试验林地设在神木县大保当乡天然臭柏林区。该区属毛乌素沙地,地形为格状沙丘,气候干旱,风沙严重,土壤瘠薄,臭柏呈块状分布,树高0.5—1.5米,与黑沙蒿间隔,覆盖率0.3左右。1979年以来,侧柏毒蛾在该林区此起彼伏大发生,1986年防治前,2—3龄幼虫平均有虫枝率49%,米平均虫口密度8.2条。二、试验材料及方法试验药剂为安阳林药厂生产的25%灭幼脲Ⅲ号胶悬剂。将其稀释成9.7—29.2倍,以清水作溶剂,尿素作助剂。每公顷喷液量
In mid-May 1986, we conducted a low-capacity aircraft spraying of mefenapat III suspending agent to control Botrytis cinerea, with an area of 813.3 hectares and achieved good results, thus finding an effective way for large-scale prevention and control of forest pests in the future. Now the results are as follows. First, the experimental forest profile The experimental forest was located in Shenmu County Dabo Dang Township, natural blubber zone. The area belongs to the Mu Us sandland, the terrain is a grid-shaped sand dune with arid climate, severe sandstorm and infertile soils. The cypress is cypress-like with a height of 0.5-1.5 meters and is separated from Artemisia selengensis with a coverage of 0.3. Since 1979, the arborvitae moths occur one after another in the forest area. Before 1986, the 2-3 instar larvae had an average rate of 49% and the average population density was 8.2. Second, the test materials and methods Test agents for Anyang Lin Pharmaceutical Factory production of 25% mefenapat Suspension III. The diluted to 9.7-29.2 times, with water as a solvent, urea as a promoter. Spray volume per hectare