Suppression of Phytophthora Root and Crown Rot on Pepper Plants Treated with Acibenzolar-S-Methyl

Plant Disease
M E Matheron, M Porchas

Abstract

The fungicide mefenoxam is registered for the control of Phytophthora blight of peppers caused by Phytophthora capsici. Isolates of the pathogen that are insensitive to mefenoxam, however, have been detected in some locations. Consequently, alternative methods are needed to control Phytophthora blight of peppers. Acibenzolar-S-methyl (ABM, Actigard) is a chemical activator of plant disease resistance that has potential for the management of Phytophthora blight of peppers. The effect of foliar applications of ABM on the development of root and crown rot on pepper plants grown in the greenhouse and inoculated with Phytophthora capsici or in soil naturally infested with the pathogen was evaluated. Inhibition of stem canker development on pepper cvs. Bell Tower and AZ9 after four treatments with ABM (75 μg/ml) was significantly greater than on plants receiving a single application of the chemical. Stem canker length on Bell Tower or AZ9 peppers was inhibited by 93.2 to 97.2% and 87.4 to 92.4% when plants were inoculated with P. capsici at 1 or 5 weeks, respectively, after the fourth application of ABM. Survival of chile pepper plants grown in field soil naturally infested with P. capsici was significantly increased by three foliar ...Continue Reading

References

Jun 1, 1992·The Plant Cell·S UknesJ Ryals
Mar 10, 2000·Clinical Radiology·P Armstrong, D B Waters
Apr 28, 2000·The Journal of Peptide Research : Official Journal of the American Peptide Society·S E BlondelleE Pérez-Payá
Jan 1, 1994·Annual Review of Phytopathology·H KessmannJ Ryals
Dec 1, 1999·Plant Disease·Jean Beagle Ristaino, Stephen A Johnston

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Citations

Oct 8, 2014·The Plant Pathology Journal·Umit Ozyilmaz, Kemal Benlioglu
Dec 1, 2004·Plant Disease·Mary K Hausbeck, Kurt H Lamour
Nov 6, 2014·Journal of Agricultural and Food Chemistry·Thomas Dugé de BernonvilleMarie-Noëlle Brisset

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