辽中县杨树植根苗造林套袋防虫试验初报

Experiment of Bagtying for Pest Control on Poplar Planting Stock in Liaozhong County

试验结果表明，对杨树植根苗实行套袋防虫，不仅苗木成活率可达到１００％，而且套袋防虫可促进苗木生长量增长近１５．７％，而化学药剂防虫促进苗木生长量增长则为５％左右。

he result shows that the survival percent of poplar planting stocks treated with bagtying for pest control gets up to 100% and the increment increases about 15.7%,but the increment reaches of the stocks treated with chemicals increases 5% or so.