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稻纵卷叶螟(Cnaphalocrocis medinalis Guen?e在我处一年发生八代,从2月中旬成虫始见后,一直至11月中旬才终见,该虫原为局部间歇性发生、常年以三代、六代为害重。1978年后,上升为最主要害虫之一,早造以二、三代、晚造以第六、七代重发生,一年间的田间蛾量,以每年的5月中旬至6月上旬和9月中旬至11月上旬期间最大。现将其化蛹习性简介如下。 据田间调查,稻纵卷叶螟以老熟幼虫作茧化蛹,其在植株丛中的化蛹部位,是因世代不同和水稻生育期不同而有别,其化蛹部位的高低
Cnaphalocrocis medinalis Guenée occurred eight times a year in my house, and it did not reach the end of mid-November after it began to be seen in adults in mid-February. The worm was locally intermittent, perennial in three generations, Six generations of harm .1978 years later, rising to one of the most important pests, as early as the second and third generation, made late in the sixth and seventh generation, the amount of field moths a year to mid-May each year to 6 Month and mid-September to early November is the largest of its pupation is now briefed as follows.According to field investigations, the rice leaf roller to cocoon mature larvae cocoon pupation, the plexus in the plant part of the pupation, Because of different generations and different rice growth period are different, its level of pupation parts