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The Imbibition and Emergence Responses of Polymer-Coated Fuzzy Cottonseed

K. D. Williams, N. W. Hopper and T. C. Wedegaertner


 
ABSTRACT

With increased concerns surrounding the acid delinting process, alternatives have been investigated that utilize polymers as a means to increase flowability of cotton seed without delinting. However, the use of polymers as a means of improving handling of planting seed can only be practical if the coating does not significantly slow or inhibit germination and emergence. In this study, Paymaster 2200RR and Paymaster 2326RR were utilized. All treatments had 0.75 oz/cwt. of Apron TL, 3 oz/cwt. of Captan 4000, and 6 oz/cwt. of Vitavax-PCNB applied for control of fungal growth. The controls consisted of the raw fuzzy seed and acid delinted seed treated with the fungicide mixture and no polymer coatings. To evaluate the effects of various polymers and polymer rates, a starch polymer (EasiFlo) and Opadry Ag were each applied at 4 and 8% of seed weight by Tom Wedegaertner at Cotton Incorporated in Raleigh, North Carolina. The treatments were tested for cool germination %, warm germination %, Emergence Rate Index (640F /180C and 860F/ 300C), and Establishment Index (640F /180C and 860F/ 300C). In general, the polymer coating treatments did not reduce the cool or warm germination percentages with the exception that the Paymaster 2200RR cool germination percentage was reduced with starch polymer coating (4 and 8%). The emergence rate index and establishment index (%) was reduced in the cool emergence tests by the 4 and 8 % rates of the starch polymer with the exception that ERI and EI were not reduced by the 4% starch polymer coating on the PM2326RR variety. In general, the ERI and EI values were reduced in the warm emergence tests by only the 8% starch polymer rate. The Opadry Ag polymer coatings had no effect on the warm or cool germination percentages and no effect on the warm or cool ERI and EI values.



Reprinted from Proceedings of the 2000 Beltwide Cotton Conferences pp. 601 - 603
©National Cotton Council, Memphis TN

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Document last modified Saturday, Jun 17 2000