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研究表明,不同寄主植物对亚洲玉米螟的发育、存活、繁殖和种群增长的影响显著。取食玉米雌穗的种群世代存活率最高,棉铃次之,棉茎最低。以玉米雌穗、棉铃、棉茎为食料的世代净生殖率依次为45.62、27.91和0.48;其内禀增长率分别为0.0962、0.0846和-0.0143。在一定距离内玉米田的虫源可影响棉田的为害程度。分析了江苏棉区玉米螟不同为害型的形成机理,棉田1代玉米螟缺乏适宜食料和外来虫源可能是形成不同为害型的主要因素。
Studies have shown that different host plants have a significant impact on the development, survival, reproduction and population growth of the Asian corn borer. The population survival rate of corn ear fed corn was highest, followed by cotton boll, and lowest in cotton boll. The net generation reproductive rates of corn ear, cotton boll and cotton stem were 45.62, 27.91 and 0.48, respectively. Their intrinsic rate of increase was 0.0962, 0.04646 and -0.0143, respectively. In a certain distance, the insect source in corn fields can affect the degree of harm in cotton fields. The formation mechanism of different damage types of corn borer in Jiangsu cotton area was analyzed. The lack of suitable foodstuffs and external insect sources for the first generation of cotton borer in cotton field may be the main factors causing different damage types.