Submitted to: International Pepper Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: November 14, 2004
Publication Date: November 1, 2005
Citation: Rosskopf, E.N., Ables, C.Y., Albano, J.P., Lamb, E. 2005. Screening of biorationals for control of phytophthora capsici. 17th International Pepper Conference Proceedings, Naples, Florida, p. 24. Technical Abstract: Phytophthora blight and root and crown rot of peppers, caused by Phytophthora capsici, is considered one of the most limiting diseases in the production of bell peppers in the southeast. Available control measures are often inadequate when weather conditions favoring epidemics of the disease are present. The loss of methyl bromide further intensifies the need to find alternative tactics for control. While there are many biologically based products that have some efficacy for controlling soil borne diseases, few are labeled for control of Phytophthora spp. Greenhouse trials were conducted testing the efficacy of several biorational products in controlling this disease. All products were applied as soil drenches based on label recommendations for other vegetable crops. A range of application rates was used for the experimental materials. Results with organism-based products were highly variable. A mixture of dipotassium phosphonate/dipotassium phosphate, currently in commercial development under the name BIOPHOS, provided consistent control of the disease in greenhouse experiments.