SELECTION IN COTTON FOR BOLL-WEEVIL RESIS TANCE

The boil weevil Anthonomus grandis Boheman is one of the major pests o f cotton in Brazil. There have been many attempts to locate sources of plant resistance to this insect in USA. Some authors listed primitive Gossypium hirsutum L. that have given significant reduction in ovipos ition punctures in laboratory tests and some lines showed significant reduction of boil weevil population under field conditions. From these stocks, after cross with Stoneville 213, PNH3 and CNPA Precoce 2, som e lines with resistance and with good fiber and yield characteristcs w ere developed.