CAJ | 학술논문

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＝0.119 x2-0.203 x＋0.438（ R2＝0.998）；y体长＝0.872 x2-0.224 x＋2.073（ R2＝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＝4.93e1.30 x （ R2＝0.995）。整个幼虫期每头幼虫可累计取食大豆叶片面积为12918.16 mm2。其中4～6龄幼虫的取食量占整个幼虫期取食量的97％以上。
위료명학감람야아대대두협편적취식량，심입연구기취식위해규률，시험채용리체협편단두사양법，재실온26～27℃조건하관찰료감람야아각충태발육력기병측정료기각령기유충취식량。결과현시：감람야아란발육력기평균수3.64 d ，유충공6령，기발육력기수17.88 d ，예용기수1.85 d ，용기수13.78 d。각령유충적두관여체장균수착령기적증장이증대，두관여체장적생장모형분별위 y두관＝0.119 x2-0.203 x＋0.438（ R2＝0.998）；y체장＝0.872 x2-0.224 x＋2.073（ R2＝0.998）；감람야아유충루적취식량여발육령기적관계모형위 y＝4.93e1.30 x （ R2＝0.995）。정개유충기매두유충가루계취식대두협편면적위12918.16 mm2。기중4～6령유충적취식량점정개유충기취식량적97％이상。
To clarify soybean leaf feeding amount and harmful feeding law of Mamestra brassicae L .,du-ration 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=0.119 x2 -0.203 x+0.438(R2=0.998);ybody length=0.872 x2 -0.224x+2.073(R2=0.998) .The relationship between instar and feeding amount is :y=4.93e1.30x ( R2=0.995 ) .Total feeding amount of M . brassicae larva was 12 918.16 mm2 ,and the feeding amount of 4~6 instars accounted for more than 97% of the whole larva duration .