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Description:
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This project was conducted to determine if an alternative method of delinting cotton seed based on mechanical delinting and use of the Easiflo seed coating process , would be comparable to the current standard method of acid delinting seed in the frequency of survival of Xanthomonas axonopodis pv . malvacearum (Xam ) . Paymaster 2326 RR was grown at Halfway , TX in 2006 and treated with a solution of Xam + Silwet L77 . In 2007 , cotton bolls from Paymaster 2326RR and All -Tex Xpress RR were injected with concentrations of Xam . In 2007 , bulk harvested seed from a third cultivar (Deltapine 164B2RF ) was obtained from a field that had been naturally infected with Xam . Seed from each infection method and cultivar was divided into two batches , with one batch mechanically delinted and treated with Easiflo coating and the other batch processed with acid delinting . For each batch , isolations were made on 1 ,000 seed (900 in Paymaster 2326 RR from 2006 ) and yellow , mucoid colonies characerisitc of Xam were stored and later tested for pathogenicity on cotton seedlings . In 2006 , Paymaster 2326RR (inoculated by sprays on leaves ) had a higher frequency of Xam using Easiflo treatment (2 .7 % ) than with the acid treatment (0 % ) . In 2007 , All -Tex Xpress RR (boll injection ) had a higher frequency of Xam recovered from seed with acid delinted seed (3 .8 % ) than with the Easiflo treatment (1 .1 % ) ; however , isolation frequencies were similar for Paymaster 2326 RR . No differences in Xam isolation frequency were observed between the two methods for naturally infested seed . Overall , results from this study are inconclusive , thus , additional studies are required to better understand the impact of using the Easiflo seed coating system on Bacterial blight development . |