Year: 2013 | Month: November | Volume 6 | Issue 4s
Photocatalytic Activity of Zinc Sulphate Nano Material on Phytopathogens
Abstract: <div>Phytopathogens cause both qualitative and quantitative loss in all areas of agricultural practices. Phytopathogens are controlled by pesticides but it is associated with side effects. Most organisms develop resistance to pesticides and high concentration of pesticide is phyto toxic. Hence the present study is aimed to assess the potential application of nano dimensional zinc sulphate</div><div>as a photo catalyst to control Xanthomonas campestris, X.malvacearum, Pseudomonas solanacearum and P.syringae. Nano material of zinc sulphate was produced by ball milling method. It was characterized by SEM and XRD. Antimicrobial activity of Zinc sulphate was evaluated by well diffusion method. 0.01%, 0.05%, 0.1% and 1.0% of zinc sulphate nano material was used to study its influence on growth and death kinetics of all phytopathogens. Size of zinc sulphatenano material was 100 nm and it showed sharp peaks in XRDcorresponding to zinc sulphate. Zinc sulphate at a concentration of 100 µg/100 µl exhibited microbicidal activity with an inhibition zone of 18mm, 14mm, 12mm, 10 mm against P.solanacearum, P.syringae, X.malvacearum and X.campestris respectively.In growth kinetics study, P.solanacearum without any photocatalyst had a lag phase up to 30 minutes and the</div><div>presence of photocatalyst extended it upto 90 minutes. At 90min the cfu/ml was 38.5 x 108, 11.7 x 108, 10.73 x 108,10.22 x 108 ,1.93 x</div><div>108 in control,0.01%,0.05%,0.1% and 1.0 % respectively.1% of Zinc sulphatenano material was very effective in controlling and destroying all phytopathogens from one hour onwards. Hence the present study explores the possibility of applying zinc nano material as a photo catalyst to control phytopathogens.</div>
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