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(一>与温、湿度的关系粘虫是我省主要农业害虫之一。我省以陇南、中部干旱区发生为害较重,陇东及河西地区发生较轻。调查得知,粘虫成虫的发生始期在我省是由南向北、由东向西发生发展的,其终止期(消失期)亦是南早北迟。粘虫的发生消长受气候、食料作物的生长状况、天敌以及耕作制度等多方面因素所影响。在气候诸因素中,温湿度又是决定粘虫幼虫生长发育速度及其一年里繁殖代数的重要条件。气候温暖湿润,粘虫生长发育快;高温(30℃以上)低湿(相对湿度50%以下),生长发育受到明显抑制,而这样的环境条件持续长久,就会引起幼虫的大量死亡。所以在春夏温度高,
(A> and the relationship between temperature and humidity Mythimna separata is one of the major agricultural pests in our province to Longnan in our province, the central arid zone more serious harm, occurred in eastern Gansu and Hexi area light investigation that adult armyworm Occurrence occurred in our province from south to north, developed from east to west, and its termination period (disappearing period) is also late south south. The growth and development of armyworms affected by climate, the growth of food crops, natural enemies and farming System and many other factors.In climate factors, the temperature and humidity is to determine the growth and development of armyworm larvae and their reproductive algebra an important condition for the climate warm and humid, rapid growth and development of armyworms; high temperature (30 ℃ Above) low humidity (relative humidity below 50%), growth and development was significantly inhibited, and such environmental conditions continue for a long time, it will cause a large number of larvae die.So in the spring and summer temperatures,