Abstract
ABSTRACT Maize (Zea mays L.) is an important crop worldwide. In the southern area of the United States the two major pests of maize are fall armyworm (Spodoptera frugiperda (J.E. Smith)) and corn earworm (Helicoverpa zea (Boddie)). Fall armyworm primarily attacks maize leaves and corn earworm damages the upper part of the ear. An effort to obtain new sources for resistance is conducted through Germplasm Enhancement of Maize (GEM) project. Plants were infested at the whorl growth stage with fall armyworm neonates and evaluated for leaf-feeding damage 14 days after infestation. Plants were evaluated for ear-feeding damage based on natural infestation by corn earworm. Leaf-feeding damage values in Tifton were lower than at Mississippi State. GEMN-0259, GEMS-0311, and GEMS-0312 exhibited similar resistance levels with the resistant check on leaf-feeding damage in Tifton. Ear-feeding ratings in Tifton and Mississippi State were similar. GEMS-0311 showed the most resistance to ear-feeding damage in both environments. GEMS-0311 with resistance to both insects could be used for new germplasm development.
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