为了降低虫口密度减少翌年害虫对甘蔗的为害,在冬春期间,当害虫密度最低时我们应大力贯彻防重于治的方针,制止害虫盛发为害,确保甘蔗丰收。冬春期间一般有四种类型的蔗田。一种是秋、冬植蔗田,甘蔗下种不久,是苗期;一种是将收获的成长蔗田;一种是已收获留宿根的 In order to reduce the density of insect population to reduce the damage of sugarcane to the following year, we should vigorously carry out the policy of preventing heavy losses in the course of winter and spring when the pest density is the lowest. There are generally four types of cane fields during winter and spring. One is the autumn and winter sugar cane fields, sugar cane planted soon, is the seedling; one is to harvest the growth of sugarcane fields; one is the harvest of dormant roots