农田防护林对库尔勒香梨火疫病影响的初步研究

Preliminary Study on the Effects of Farmland Shelterbelts on Fire Blight of Pyrus brestschneideri

为了解农田防护林对香梨火疫病的影响,对尉犁县6块农田库尔勒香梨树的感病情况进行调查,探究农田防护林对梨火疫病传播蔓延的限制作用。结果表明:靠近防护林带的香梨树感病率最低,具有一定规模、林相完整的防护林可以减少或隔绝园区梨火疫病原菌的传播,在一定程度上降低了病害发生;梨火疫病病情在农田内的发生并不均匀,呈现团块结构分布。在规划梨园防护林时,需要充分考虑主风向,特别是主要害风的方向。此外,在防治过程中应采取分区定点、强化防治的策略。

In order to understand the effects of farmland shelterbelts on fire blight of fragrant pear,the susceptibility of Pyrus brestschneideri trees in six farmlands in Yuli County was investigated,and the limiting effect of farmland shelterbelts on the spread of pear fire blight was explored.The results showed as follows:the susceptible rate of fragrant pear trees near the shelterbelts was the lowest,the shelterbelts with a certain scale and complete forest form could reduce or isolate the spread of original bacteria of pear fire blight in the park,and reduce the occurrence of the disease to a certain extent;the occurrence of pear fire blight in farmland is not uniform,showing a mass structure distribution.In the planning of protection forest in the pear orchard,it is necessary to fully consider the main wind direction,especially the direction of the main damage wind.In addition,in the process of prevention and control,the strategy of zoning and strengthening prevention and control should be adopted.