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近年来,我省一些国营苗圃的病虫害严重发生,由于对苗木的检疫不严,带虫卵、虫瘿和带菌的苗木出圃,使一些病虫害的蔓延范围越来越广,难以控制,影响了苗木的产量和质量。目前,我省苗圃防治病虫害主要采取化学防治手段。这种方法投工多,投资大,长年使用使害虫抗性增加,天敌同时被害,大量使用化学药剂还会加重对环境的污染。近期,我参加了晋中地区林业局组织的苗圃考察组,参观了保定市、保定地区、北京东北旺、辽宁营口等几个苗圃,看到这些兄弟单位的病虫害发生轻微,预防效果明显,他们在加强营林措施,采取综合防治方面,有一些很好的经验值得我们借鉴。下面简单介绍一下他们的作法,供我省参考。
In recent years, a number of state-owned nurseries in our province have suffered serious pests and diseases. Due to the lack of strict quarantine measures on nursery stock, insects, insects, and nursery stockpiles have become more and more widespread and difficult to control and affect seedlings Production and quality. At present, the main prevention and control of pests and diseases in our province chemical control measures. This method of investment and more, big investment, perennial use for many years to increase pest resistance, natural enemies were killed at the same time, extensive use of chemical agents will increase the pollution of the environment. Recently, I participated in a nursery inspection team organized by the Forestry Bureau of Jinzhong Prefecture. I visited several nurseries in Baoding, Baoding, Northeastern Beijing and Yingkou, Liaoning Province. These nurseries witnessed slight pests and diseases and their preventive effects were obvious. There are some good experiences that we can learn from strengthening silviculture measures and taking comprehensive prevention and control measures. Here’s a brief introduction of their practices for our province for reference.