Roger Renzo Ramirez Antazu, Nick Dufault, Mathews Paret, Gary Vallad
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引用次数: 0
Abstract
The bacterium Xanthomonas campestris pv. campestris causes black rot, one of the most important diseases affecting brassica production worldwide. Typically, the foliar application of copper-based bactericides is used to manage the disease. However, reports of copper tolerance among xanthomonads, expanded production of diverse brassica crops, and inherent climate challenges have motivated the brassica industry in Florida to evaluate alternatives to copper for improved black rot management. Across nine cabbage trials conducted in 2021 and 2022 in Florida, twelve alternatives were evaluated individually or as tank mixtures within a program. Each trial included a copper hydroxide standard (Kocide 3000) and a nontreated control. Based on the area under disease progress curve (AUDPC), solo applications of the plant defense activators Actigard (acibenzolar-S-methyl), Howler (Pseudomonas chlororaphis), Regalia (Reynoutria sachalinensis extract), ReyZox (Reynoutria sachalinensis extract + azoxystrobin), Theia (Bacillus subtilis), and Vacciplant (laminarin) reduced disease severity compared to the nontreated control and performed equivalent to or better than the Kocide 3000 standard across trials. Howler, Regalia, and Kocide 3000 increased cabbage yields compared to the non-treated control in at least one trial, while Actigard failed to improve yield in any trial. Applications of Microthiol (sulfur), either alone or as a tank mixture, failed to reduce disease severity or improve yield. Regardless of the program, maximum disease control at the final rating was limited to 8% compared to the nontreated control, indicating a need to improve integrated approaches for black rot management.
期刊介绍:
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.