Activity of a novel bactericide, zinc thiazole against Xanthomonas oryzae pv. oryzae in Anhui Province of China. (27th October 2014)

• Record Type: Journal Article
• Authors: Chen, Y.; Yang, X.; Gu, C‐Y.; Zhang, A‐F.; Zhang, Y.; Wang, W‐X.; Gao, T‐C.; Yao, J.; Yuan, S‐K.
• Is Part Of: Annals of applied biology. Volume 166:Number 1(2015)
• Page Start: 129
• Page End: 135
• Publication Date: 2014-10-27
• Subjects: Crop science -- Periodicals; Plants, Protection of -- Periodicals; Crops -- Ecology -- Periodicals; 630
• DOI: 10.1111/aab.12170
• Languages: English
• ISSNs: 0003-4746

Abstract

<abstract abstract-type="main" id="aab12170-abs-0001"> <title>Abstract</title> <p id="aab12170-para-0001">Bacterial leaf blight of rice (BLB), caused by <italic>Xanthomonas oryzae</italic> pv <italic>oryzae</italic>, is one of the most serious bacterial diseases in China. Presently, bismerthiazol has been the major bactericide for the control of BLB, however, bismerthiazol‐resistant strains of <italic>X. oryzae</italic> pv. <italic>oryzae</italic> have appeared in the field in China. Zinc thiazole is a novel bactericide with strong antibacterial activity against <italic>Xanthomonas</italic> spp. In this study, sensitivity of 109 <italic>X. oryzae</italic> pv. <italic>oryzae</italic> strains to zinc thiazole was determined. The EC<sub>50</sub> values for zinc thiazole in inhibiting bacterial growth of the 109 <italic>X</italic>. <italic>oryzae</italic> pv. <italic>oryzae</italic> strains were 0.53–9.62 µg mL<sup>−1</sup> with the average EC<sub>50</sub> value of 4.82 ± 1.86 µg/ml. The minimum inhibitory concentration (MIC) values of zinc thiazole against the 109 <italic>X. oryzae</italic> pv. <italic>oryzae</italic> strains were assessed and the results showed that the MIC values of zinc thiazole for completely inhibiting the growth of these 109 strains ranged from 5.0 to 40.0 µg mL<sup>−1</sup>. In the evaluation of protective and curative activity test, zinc thiazole exhibited great activity against BLB and provided over 88% control efficacy (at 300 µg mL<sup>−1</sup>) 1 and 3 days before or after inoculations, which was also higher that that of bismerthiazol in the corresponding treatments. Our field trials showed that zinc thiazole at 375 g.a.i ha<sup>−1</sup> provided over 70% control efficacy in 2012 and over 80% control efficacy in 2013 at both sites. Moreover, in all the four field trials, zinc thiazole at 250 g.a.i ha<sup>−1</sup> provided higher control efficacy than that of bismerthiazol at 250 g.a.i ha<sup>−1</sup>. Taken together, zinc thiazole is therefore an alternative tool for the management of BLB.</p> </abstract>