Apron, Epic and CGA 64251 Seed Treatments Affect Stand and Yield of Cotton

Earl B. Minton, R.H. Garber, C.C. Orr, J.E. DeVay, A.W. Wienhold, and L.S. Bird


 
ABSTRACT

Apron, Epic, and CGA 64251 control the major seedling disease pathogens Pythium, Rhizoctonia, and Thielaviopsis, respectively. During 1984, these fungicides were applied alone and in combinations to acid-delinted seed of Stoneville 213 to determine their effect on percentage of surviving seedlings in four environments (Stoneville, Mississippi, College Station, Texas, Lubbock, Texas and Shafter, California). Lint yields were also obtained at Stoneville and College Station. When a single fungicide was used, percentages of surviving seedlings were highest with Apron at Stoneville and College Station, CGA 64251 at Lubbock and Epic at Shafter. Combinations of fungicides produced higher stands than single treatments; Apron + Epic was the most effective treatment across locations. Stand counts and soil analysis indicated that the quantity of the above mentioned fungi varied among locations. Pythium and Rhizoctonia appeared to affect stands more than Thielaviopsis. In the test at Stoneville, lint yields were higher but not significantly with than without (915 lb/A) fungicide seed dressing. Lint yield was increased the most (85 lb/A) by Apron + CGA 64251 and the least (35 lb/A) by Epic alone. In the test at College Station, significant differences in lint yields were obtained among the treatments; but no fungicide treatment differed from that of the untreated (494 lb/A). Apron + Epic produced the highest (536 lb/A) and Epic + CGA 64251 the lowest (397 lb/A) yield.



Reprinted from 1985 Proceedings: Beltwide Cotton Production Research Conferences pg. 26
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998