论文部分内容阅读
经过多年观察研究,美国白蛾在山东商河1年发生3代。第1~2代幼虫为6龄,第2代极少为7龄;第3代幼虫全部为7龄。记述了2008~2010各年度成虫发生期及其与气候因子的关系,观察了成虫羽化高峰期主要时段羽化量,以18h至19:30出蛾量最多,其中18h占38.98%,19h占23.29%。2009年第1代卵历期9~18d,平均13.0d;记述了幼虫体色变化、取食特点及活动规律和各代各龄幼虫发育历期,第1代幼虫平均历期34.8d,第2代平均24.5d,第3代平均43.2d;测量了各龄幼虫的体长及头宽。首次报道蠋敌、马蜂等天敌,记述优势天敌种类。分析了第3代虫情连年反弹的原因并提出防控对策。
After years of observation and research, the United States white moth occurs in Shandong Shanghe 3 years. The 1st to 2nd larvae are 6th instars, the 2nd generation are rarely 7th instars, and the 3rd larvae are all 7th instars. The relationship between the occurrence of adult worms and climatic factors in each year from 2008 to 2010 was described. The emergence of adults during the peak period of eclosion peak was observed. The maximum amount of moths was from 18h to 19:30, of which 18h accounted for 38.98% and 19h accounted for 23.29% . The first generation of ovarian larvae in 2009 was 9 ~ 18 days, with an average of 13.0 days. The body color change, feeding characteristics and activity patterns of larvae and the developmental age of each larva of each generation were described. The average larval duration of first generation larvae was 34.8 days. 2 generations average 24.5d, the third generation average 43.2d; measured each instar larvae body length and head width. For the first time reported enemies, wasps and other natural enemies, describes the types of dominant natural enemies. Analyzed the third generation of insect causes rebound year after year and proposed prevention and control measures.