Agronomically Enhanced Insect-Resistant Cottons

J.E. Jones, J.I. Dickson, J.B. Graves, A.M. Pavloff, B.R. Leonard, E. Burris, W.D. Caldwell, S. Micinski, and S.H. Moore


 
ABSTRACT

Two elite frego bract cotton (Gossypium hirsutum L.) strains (La 850074-F and La 850075-F) were identified with resistance to the bollworm-tobacco budworm (BW-TBW) complex [Heliothis zea (Boddie) and H. virescens (F.)] equal to or better than La HG-660 and with yielding ability equal to 'Deltapine 41' (Dp 41) and IDES 1191 in the absence of BW-TBW damage. Three new frego bract strains (La 850082-FN, La 860280-F, La 860284-F) exhibited field resistance to BW-TBW higher than La HG660 with yields superior to this strain in the presence of BW-TBW and equal to it in the absence of BW-TBW damage. La 850082-FN is also nectariless; it gave exceptionally high yield stability across environments with little yield reductions in the presence of BW-TBW. These five strains have the frego bract trait, and thus, would be expected to be resistant to the boll weevil (Anthonomus grandis Boheman) as well. These agronomically enhanced, multiple insect-resistant cotton strains have the potential of reducing losses from insects, reducing production cost, reducing environmental contamination, and prolonging the effective life of pyrethroid insecticides.



Reprinted from Proceedings: 1989 Beltwide Cotton Research Conferences pg. 135
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998