摘要
小菜蛾的发生量除了受到食料、各类天敌联合作用的影响外，明显受到温度、降水因素的影响。在海南岛每年5—10月，旬平均气温27℃以上，旬降水量50mm以上，小菜蛾发生受到抑制，田间发生量小；在11—12月至次年1—4月，旬平均气温18-25℃，旬降水量30mm以下，适宜小菜蛾生长发育，田间发生量大。显而易见，随着旱季和雨季的交替变化，小菜蛾的田间发生量也随着增加或降低。年度间，旱季或雨季提早或推迟，是决定当年小菜蛾幼虫盛发期提早或延迟的决定因素。
Besides host plants and natural enemies, temperature and rainfall are two most important factors closely relat- ed to the population dynamics of the diamondback moth in fields. In Hainan Province, the diamondback moth would occur at low level during May to October, if the ten-days mean temperature was higher than 27 ℃ and the rainfall was more than 50 inm. Outbreaks would happen in the post-rain dry season between last November and April, when the ten- days averaged temperature was between 18-25 ℃, and rainfall was no more than 30 mm at the same time. The results indicated that population dynamics of the diamondback moth was significantly correlated with the alternation of dry season and rainy season, and the peak time depended on the coming of the monsoon.
出处
《植物保护》
CAS
CSCD
北大核心
2010年第5期118-122,共5页
Plant Protection
基金
公益性行业(农业)科研专项(200803001)
国家科技支撑计划课题(2007BAD48B07-02)
关键词
小菜蛾
消长规律
影响因子
Plutella xylostella （L.）
population dynamics
influence factor
