A Boll Weevil Oviposition Suppression Factor in Cotton1
- William T. Buford,
- Johnie N. Jenkins and
- Fowden G. Maxwell2
The rate of boll weevil, Anthonomus grandis Boheman, oviposition was tested on 252 cotton lines, Gossypium hirsutum L. and G. barbadense L., in a nonreplicated mass screening procedure. Boll weevil oviposition was reduced in 26 lines. Replicated tests were performed on six of these by using the A & M laboratory strain and a Mississippi field strain of weevils. The two strains ranked the six cotton lines in relatively the same order. We obtained F1 hybrids of each of the 26 lines by crossing them with ‘Deltapine Smooth Leaf’ (DPSL) and tested the hybrids for oviposition with the A & M strain in replicated tests. Significant differences were found. Oviposition values ranged from 49 to 178% of the commercial DPSL parental line. ‘S. I. Seaberry’ produced the lowest oviposition rate. Inheritance studies with S. I. Seaberry ✕ DPSL were conducted in the F1, F2, and backcross progeny. Difficulty was experienced in testing individual F2 backcross plants since the test required many squares. We did, however, determine that the ability of S. I. Seaberry to suppress boll weevil oviposition was under genetic control.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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