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我省有果树场圃82个,面积约70万亩。据调查,这些场圃草害普遍严重,在果木生长季节一般需人工除草4～5遍,每亩用工12～20个左右,而且还不能除尽,很多场圃常出现严重草荒现象。 为了摸清不同类型果园草害发生情况并研究防除办法,从1975年起我们首先在国营黄海农场进行果园草害调查和化学防除配方筛选研究。1984年又在全省南、北、中有代表性的15个果园进行草害调查,调查面积611亩,代表面积为4460亩。并在淮阴清江果园,连云港孔望山和苏州上方山等果园进行果园杂草化学防除配方筛选及应用技术条件的研究,对主要害草的消长进行了定点调查和除草剂的敏感性试验。
There are 82 fruit tree farms in our province with an area of about 700,000 mu. According to the survey, grass field nurseries are generally serious. In the growing season of fruit trees, artificial weeding is generally required 4 to 5 times and about 12 to 20 mu per mu. However, many farm nurseries often have severe grass shortage. In order to find out the different types of orchard grass damage and to study the prevention and control measures, from 1975 onwards, we first carried out in the state-owned Yellow Sea farm orchard grass damage investigation and chemical control formula research. In 1984, another 15 representative orchards in the south, north and south of the province were surveyed. The investigation area was 611 mu and the representative area was 4460 mu. In Huaiyin Qingjiang Orchard, Lianyungang Kongwang Mountain and Suzhou Shangfang Hill and other orchards chemical weed prevention and control of formula screening and application of technical conditions, the growth and decline of the main grass to carry out a targeted investigation and the sensitivity of herbicides.