高粱条螟在春玉米上的发生规律及危害特点
OCCURRENCE PATIERN OF PROCERAS VENNOSATUM (WALKER) AND THE CHARACTERISTICS OF THE HARM IT CAUSES TO SPRING MAIZE
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摘要: 高粱条螟以春玉米秸秆作为其主要越冬场所。1999年平均百株有虫47头,占越冬钻心虫类害虫的59.9,;室内现察越冬幼虫的化蛹高峰期在4月21~25日,羽化高峰期在5月10~13日;田间系统调查表明,高粱条螟在春玉米上一年发生2代,春玉米抽雄和扬花期(6月中旬)是1代幼虫的危害盛期,春玉米将要收获时,在玉米上发生第2代幼虫,并在春玉米秸秆上越夏和越冬,成为第2年的虫源。提出了以处理春玉米秸秆为主,同时结合性诱剂诱杀、点施颗粒剂及采用微生物制剂封垛等进行处理的高粱条螟综合治理措施。
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关键词:
- 高莱条螟,春玉米,发生规律,害虫防治
Abstract: In 1997 ~ 1999,a systematic study was made to investigate the occurrence pattern of Proceras vennosaturu (Walker) ,which has become a dominant pest in spring maize fields around Chongqing in recent years,and the characteristics of its harm to the crop. The pest ws found to overwinter on harvested maize stalks. Laboratory observations showed that its pupating peak occurred on 21 ~ 25, April and the peak of its adult emergence on 10~ 13 of next May. A systematic field survey indicated that 2 generations of the pest occurred in one year. Most harm was made by its larvae of the first geration during the tasseling and fiowering stages of the plants,and the second generation occurred before harvest and overssummered and over- wintered on the harvested stalks,thust becoming the pest source of the next year. Some measures for the integrated management of the pest are recormmended. -
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