亚洲玉米螟在人工饲料上连续饲养多代对玉米危害能力比较

亚洲玉米螟在人工饲料上连续饲养至１２、２４、３２、４８和７１代时，其初孵幼虫在感螟玉米杂交种中单２号上取食危害能力同Ｆ_２代一样强，食叶级别没有差异；饲养至８４代时，其在玉米植株上的蛀孔数同Ｆ_２４、Ｆ_３７、Ｆ_４５及Ｆ_６１的蛀孔数没有明显差异，说明亚洲玉米螟在人工饲料上连续饲养６～７ａ（７１～８４代）时，仍可以用于田间玉米抗螟性鉴定。

Comparison the virulence of the Asian corn borer larvae reared for different generations on a semi-artificial diet to a susceptible corn hybrid.

The larvae of the Asian corn borer (ACB), Ostrinia furnacalis (Guenee), reared for 12, 24, 32, 48 and 71 generations on a semi-artificial diet, were used to compare their virulence to a F2 generation larvae artificially infested to a susceptible corn hybrid-zhongdan No. 2. No significant difference in virulence were found among the insect materials tested as indicated by the leaf feeding damage induced. Similarly, no significant differences in stalk damage caused by larvae reared for 24, 37, 45, 61 and 84 generations on the same diet to the same hybrid were observed. It was thus concluded that the ACB reared on the particular diet for 6 to 7 years could still be used for field resistance evaluations.