Influence of Whorl Region from Resistant and Susceptible Corn Genotypes on Fall Armyworm (Lepidoptera: Noctuidae) Growth and Development

作者：Yu-min Chang, Dawn Sywassink Luthe, Frank M. Davis, William Paul Williams · 发表于：Journal of Economic Entomology · 年份：2000 · DOI：10.1603/0022-0493-93.2.477 · 被引用次数：41 · 研究领域：Insect Resistance and Genetics、Insect-Plant Interactions and Control、Insect Pest Control Strategies

The effect of diets prepared from whorl tissue of resistant and susceptible corn genotypes, Zea mays L., on the larval growth, development, and physiology of fall armyworm, Spodoptera frugiperda (J. E. Smith), was analyzed. Larvae reared on an optimized artificial diet had a higher growth rate and developed faster than those reared on lyophilized whorl tissue from resistant and susceptible genotypes. Larvae reared on the resistant material were smaller and had a longer developmental period. Larvae reared on yellow-green and green whorl sections from resistant plants were significantly smaller than those reared on the same sections of susceptible plants. There was no significant difference in weight when larvae were reared on the yellow whorl regions from either resistant or susceptible lines. Physiological indices were determined for larvae fed resistant and susceptible lyophilized and fresh whorl material. Larvae fed resistant lyophilized material had significantly lower growth rate (GW) and efficiency of conversion of ingested food to body substance (ECI) than those reared on artificial diet or susceptible material. However, there were no significant differences in consumption index (CI), approximate digestibility (AD) and efficiency of conversion of digested food to body substance (ECD) between larvae reared on lyophilized tissue from resistant and susceptible genotypes. Larvae reared on fresh yellow-green whorl sections from resistant plants had significantly lower GW, EC...