Resistance of Frego-Type Cotton to Boll Weevil and Bollworm12

Abstract

Frego-type cotton refers to a mutant form with rolled bracts in contrast to the flat and more-or-less enclosing bracts of normal plants. Research at the Arkansas Agricultural Experiment Station on the rolled bract mutation as a source of insect resistance has been carried on since 1958. Hunter et al. (1965) reported it to be the most promising source of resistance to boll weevil. Anthonomus grandis Boheman, found in an extensive search through a broad spectrum of Gossypium hirsutum germ plasm.