火炬松造林后第一年,幼苗常被野兔咬去顶梢,或将苗茎咬断,危害情况严重的,常要全面重新造林,美国田纳西州曾试用多种措施来防止松苗受害,但大多数不成功。一般最多采用的方法是用忌避剂喷射松苗,或者在栽植前先将松苗蘸染药液,但在实践中试用,不是失败就是效果不稳定,有时蘸染药液还会使松苗遭受药害。用聚乙烯薄膜来套着幼苗,可以在造 In the first year after the Pinus taeda afforestation, the seedlings are often bitten by the hare to the top, or the seedlings are severed. The serious damage is caused by the frequent reforestation. Tennessee has tried a variety of measures to prevent the damage of the seedlings, but the large Most unsuccessful. The most commonly used method is to use the repellent spray pine seedlings, pine seedlings or dipped in liquid before planting, but in practice, not failure is the effect of instability, and sometimes dipped in liquid medicine will also make pine seedlings suffer injury. With polyethylene film sets of seedlings, can be made