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在我国长江流域以南,广泛地分布着网螱属(Reticulitermes)、乳螱属(Coptotermes),大螱属(Macrotermes)和土螱属(Odontotermes)等种类。其中尤以土螱属和大螱属的某些种类对人工林造成的危害更甚。过去对这二属螱类危害种的化学防除,通常采用六六六、DDVP插管等烟剂鼓风压烟及铁筒自然压烟以及灭蚁灵(Mirex)粉剂喷射等法,可取得一定的效果。但是这些方法都有污染环境、费用较高、耗药量大等问题。 为此,我们于1983年8月下旬～1984年12月上旬在宜兴县林场进行了应用“胶冻剂毒饵”灭治林地白蚁的野外试验。现将试验情况报导如下: 一、试验林地的选择 选择土囟螱(O.fontanellus)、黄翅大螱(M.barneyi)和黄胸网螱(R.flaviceps)危害严重而过去未经防治的林地。 试验林地选定在茅山工区。确定茅山护林房下、沟北路东约7亩人工杉木林为试验林。1983年8月25日抽样调查,从南到北任选两排植株检查白蚁危害情况。结果见表1。
To the south of the Yangtze River basin in our country, Reticulitermes, Coptotermes, Macrotermes and Odontotermes are widely distributed. Among them, some species of the soil genus and mackerel are more harmful to the plantation. In the past, chemical control of these two genus species of harmful species, usually using 666, DDVP intubation and other tobacco products such as blast smoke and iron tube natural cigarette smoke and Mirex powder injection method can be achieved Effect. However, these methods all have problems of polluting the environment, high costs and large consumption of drugs. For this reason, we carried out the field experiment of using “jelly bait” to kill termites in forest in Yixing County from the end of August 1983 to the beginning of December 1984. Now the test report is as follows: First, the choice of experimental woodland Choose O.fontanellus, M.barneyi andR.flaviceps endanger the severity of the past without control woodland. The experimental forest was selected in Maoshan area. Determine the Maoshan shelter, ditch North Road, about 7 acres of artificial Chinese fir plantation forest. August 25, 1983 sampling survey, from north to south, two rows of plants were selected to check the termite damage. The results are shown in Table 1.