运城市梨园梨小食心虫成虫发生规律与迷向效果调查

Investigation on Occurrence Regularity and Mating Disruption Effect of Grapholitha molesta Adults in Pear Orchards of Yuncheng City

对运城市梨小食心虫的发生规律进行调查,并利用梨小食心虫性信息素迷向散发器对梨小食心虫的迷向效果进行了研究。结果表明,运城梨园梨小食心虫始见于3月下旬,终见于9月中旬,一年可发生4~5代;梨小食心虫性信息素迷向散发器对梨小食心虫的迷向效果可达98.98%,显著降低了梨小食心虫成虫的交配率,减少了其后代的种群数量。建议在防治梨小食心虫的关键时期,可大面积推广使用梨小食心虫性信息素迷向散发器。

The occurrence regularity of Grapholitha molesta adults in Yuncheng city was inveatigated,and the mating disruption effect was surveyed by using sex pheromone.The results showed that Grapholitha molesta adults appeared in late March and the amount of Grapholitha molesta was significantly reduced after mid-September,which could occur 4-5 generations in one year.The mating disruption effect of sex pheromone of Grapholitha molesta adults were 98.98%,which significantly reduced the mating rate of Grapholitha molesta adults and the population number of its offspring.It was recommended that during the control critical period of Grapholitha molesta adults,the sex pheromone could be widely used.