豆天蛾是一种对树木危害较大的食叶害虫。我场的刺槐成幼林中,近几年经常发生豆天蛾。由于豆天蛾抗药力强,加上成林树木高大不易喷药,所以用药剂防治花钱多而收效小;人工捕捉虽效果较好但也不经济。3年来,我场在秋季老熟幼虫落地越冬时,把猪放入林地吃老熟幼虫,收到了很好的效果。一头重70斤左右的猪一天可吃16—20斤幼虫。我场原来豆天蛾 Bean thorn moth is a greater hazard to the tree leaf insect pests. In my field of acacia into young forest, moth often occurs in recent years. Due to the strong resistance of bean moths, coupled with tall forest trees difficult to spray, so the drug control more expensive and less effective; artificial capture, although the effect is better but not economical. 3 years, my field in the autumn when the larva mature larvae landing winter, the pigs into the woodland to eat mature larvae, received good results. A pig weighing about 70 pounds a day can eat 16-20 kg larvae. My original field moths