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陕西省属于我国甜菜种植的新区,近年来由于化学农药和喷药工具的发展以及内吸性杀菌剂抗药性的产生等原因,有必要进一步查明褐斑病流行规律,并结合当地条件、对新型农药工具,本着“因地制宜”的原则,提出适合本区防治措施、切实解决当前生产问题。本文就是1976年—1978年在华县对上述问题研究的结果。一、褐斑病发生和流行规律(一)分布和为害:1970年我省开始种
Shaanxi Province belongs to a new area of beet cultivation in our country. In recent years, because of the development of chemical pesticides and spraying tools and the generation of antibacterials of systemic fungicides, it is necessary to further ascertain the epidemic rule of brown spot, and according to the local conditions, New pesticide tools, based on the principle of “according to local conditions”, put forward measures suitable for prevention and control in this area to effectively solve the current production problems. This article is from 1976 to 1978 in Huaxian the results of the study. First, the occurrence and prevalence of brown spot disease (A) distribution and damage: In 1970 our province began to grow