• Cotton Seed Treatment, Greenlee County, 1986

      Clark, Lee J.; DeRosa, Edith (College of Agriculture, University of Arizona (Tucson, AZ), 1988-03)
      Six different seed treatments and one in furrow granular treatment were used in a field with a history of black root rot, caused by Thielaviopsis basicola. The treatment was a follow-up on the study done the previous year (1). Stand counts, root lengths and seed cotton yields were taken to see if any of the treatments increased stand counts or stimulated root growth. Thielaviopsis was not isolated in the plants this year, so the effect of the fungicides on this pathogen were not evaluated. Stand counts were, however, significantly influenced by the seed treatments.
    • Cotton Variety Trials, Greenlee County, 1987

      Clark, Lee J.; DeRosa, Edith (College of Agriculture, University of Arizona (Tucson, AZ), 1988-03)
      Four short staple variety trials were harvested in Greenlee county in 1987, covering long season varieties, early maturing varieties, acala varieties and a regional variety trial which was duplicated in Cochise county. Germains GC 510 and Delta Pine 90 yielded equally with acala 1517-75 in the long season trial. Delta Pine 20 out-yielded acala 1517-SR1 in the trial of earlier maturing varieties. An experimental acala, B 510, out-yielded the other acalas in the trial, but required more time to produce the yield. Wider experience with this new acala and others in the trials will be necessary before recommendations can be made. The better yielding varieties produced more than two bales of lint this season.