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小地老虎是我县棉花苗期的主要害虫。历年来皆为第一代幼虫为害棉苗,常因年份不同,为害程度轻重有异,重者可造成缺株断垄。1973年,除第一代幼虫严重为害棉苗外,全县2万余亩水改旱棉田,又遭到第二代幼虫的严重为害。 一、发生与为害情况 1973年5-6月气候较常年特殊,5月下旬连续降雨,6月上旬又时晴时雨,致使棉田管理工作受阻,尤其锄草工作无法进行。6月13日后,连日曝晴,全县于6月15-18日止,2万余亩水改旱棉田锄灭了杂草。棉花长势很好,均处在现蕾阶段。大沙公社火星大队在锄灭了杂草的棉田,6月16日突然发生了第二
Small tiger is my county cotton seedling’s main pests. Over the years are all the first generation of larvae damage cotton seedlings, often due to different years, the degree of harm of different severity, severe cases can result in lack of broken line ridge. In 1973, in addition to the first generation of larvae seriously damaged cotton seedlings, the county more than 20000 acres of water to dry cotton fields, but also by the second generation larvae seriously damaged. First, the occurrence and damage situation May-June 1973 climate is perennial peculiar climate, continuous rainfall in late May, early June and sunny when it rains, resulting in obstruction of cotton field management, in particular, weeding work can not be carried out. After June 13, the sunny day, the county in June 15-18 only, more than 20,000 acres of water to dry cotton hoe off weeds. Cotton grows well, are in the budding stage. Dasha commune Mars brigade hoe off weeds in cotton fields, June 16 suddenly occurred second