摘要
为了明确甘蓝夜蛾对大豆叶片的取食量,深入研究其取食为害规律,试验采用离体叶片单头饲养法,在室温26～27℃条件下观察了甘蓝夜蛾各虫态发育历期并测定了其各龄期幼虫取食量。结果显示：甘蓝夜蛾卵发育历期平均需3.64 d,幼虫共6龄,其发育历期需17.88 d,预蛹期需1.85 d,蛹期需13.78 d。各龄幼虫的头宽与体长均随着龄期的增长而增大,头宽与体长的生长模型分别为y头宽=0.119x^2-0.203x＋0.438（R2=0.998）;y体长=0.872x^2-0.224x＋2.073（R^2=0.998）;甘蓝夜蛾幼虫累积取食量与发育龄期的关系模型为y=4.93e1.30x（R^2=0.995）。整个幼虫期每头幼虫可累计取食大豆叶片面积为12 918.16 mm^2。其中4～6龄幼虫的取食量占整个幼虫期取食量的97%以上。
To clarify soybean leaf feeding amount and harmful feeding law of Mamestra brassicae L.,duration of its each developmental stage was investigated and its feeding amount was determined at room temperature 26—27 ℃,using the method of feeding single larva with detached leaves.The results showed that M.brassicae larva underwent 6 instars and the average developmental duration of larva was 3.64 d and its developmental duration was 17.88 d.The prepupa stage was about 1.85 d,and the pupal stage was about 13.78 d.Head width and body length were both increasing with the instars,the growth equations are as follows：yhead width= 0.119x^2- 0.203x ＋ 0.438（R2= 0.998）;ybody length=0.872x^2- 0.224x ＋ 2.073（R^2= 0.998）.The relationship between instar and feeding amount is：y =4.93e1.30x（R^2= 0.995）.Total feeding amount of M.brassicae larva was 12 918.16 mm^2,and the feeding amount of 4 ～ 6 instars accounted for more than 97% of the whole larva duration.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
2014年第3期271-275,共5页
Journal of Jilin Agricultural University
基金
现代农业产业技术体系建设项目(CARS-04-16)
关键词
甘蓝夜蛾
发育历期
取食量
大豆
Mamestra brassicae L.
developmental duration
feeding amount
soybean
