ADAPTABILITY AND STABILITY OF HERBACEOUS COTTON

The use of fast growing cultivars, in herbaceous cotton (G. hirsutum L . var. latifolium Hutch..) has been suggested as an important cohabiti ng strategy among boil weevil (Anthonomus grandis Boheman) and cotton crop, in the northeast region of Brazil. These cultivars were recommen ded after the introduction of the pest in this country. The objective of this trial was to compare the adaptability and stability of CNPA Pr ecoce I (fast growing cultivar) and CNPA 6H (late growing cultivar). T he bi-segmented model of Eberhart and Russel (1986) and Cruz et al. (1 989), was used. The result showed that CNPA Precoce I was more stable than CNPA 6H under unfavorable conditions, but CNPA 6H was more respon sive under favorable locations.