论文部分内容阅读
近年,茗荷普遍受到大白斑弄蝶(Udaspes folus Cramer)的为害。2009～2012年,通过田间系统调查、大田普查、室内观察和田间药效试验,对大白斑弄蝶的形态特征、生活习性、为害症状、发生规律和化学防治方法进行了初步研究。结果表明,大白斑弄蝶喜高温、低湿,连续阴雨天气对大白斑弄蝶的生长发育有抑制作用。大白斑弄蝶在本地1年发生4代,有世代重叠现象。幼虫5月下旬开始为害,一年中7、8月是幼虫为害盛期,2、3代为主害代。在实际生产中除采取人工摘除虫苞、清洁田园、清水冲洗等方法外,可根据田间卵量消长,确定化学防治适期及防治次数。
In recent years, Ming He has been victimized by Udaspes folus Cramer. From 2009 to 2012, the morphological characteristics, living habits, damage symptoms, occurrence rules and chemical control methods were studied through field investigation, field survey, indoor observation and field efficacy test. The results showed that the big white butterfly with hi-temperature, low humidity, continuous rainy weather on the growth of large white butterfly with inhibition. Large white spotted butterflies in the local generation of 4 generations a year, there is a phenomenon of overlapping generations. Larvae began to damage in late May, July and August of the year is the larvae infested peak, 2,3 generations of the main generation of victims. In addition to artificial removal of insects in the actual production of cornucopia, clean the pastoral garden, rinse and other methods, the amount of growth and decline in the field according to the amount of eggs to determine the chemical control of the appropriate period and the number of prevention and treatment.