Chemical and biological control of Rhizoctonia solani AG-4 in snap bean double-cropped with corn

• Published in: Crop protection Vol. 11; no. 2; pp. 121 - 126
• Main Authors: Sumner, Donald R., Lewis, Jack A., Gitaitis, Ronald D.
• Format: Journal Article
• Language: English
• Published: Guildford Elsevier Ltd 1992; Butterworth Scientific Limited
• Subjects: Agronomy. Soil science and plant productions; biocontrol agents; Biological and medical sciences; biological control; biological control agents; Chemical control; Control; crop yield; double cropping; efficacy; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; fungicides; Phaseolus vulgaris; Phytopathology. Animal pests. Plant and forest protection; plant pathogenic fungi; Rhizoctonia solani; Thanatephorus cucumeris; Zea mays; Georgia; fungicides; Rhizoctonia solani; biocontrol agents; Pseudomonadales; Monocotyledones; Zea mays; Plant pathogen; Biological control; Benzene derivatives; Preceding crop; Fungicide; Cereal crop; Gliocladium virens; Fungi; Leguminosae; Pseudomonas cepacia; Gramineae; Phaseolus vulgaris; Dicotyledones; Angiospermae; Chemical control; Bacteria; Pseudomonadaceae; Spermatophyta; Fungi Imperfecti; Thallophyta
• ISSN: 0261-2194; 1873-6904
• DOI: 10.1016/0261-2194(92)90093-K

Fungicides applied to soil or used as seed treatments and biocontrol agents were tested for 3 years in field experiments for efficacy against Rhizoctonia solani AG-4 in snap bean double-cropped with corn. In field plots infested artificially with R. solani AG-4, PCNB was as effective as flutolanil in increasing yield of green pods; however, flutolanil was more effective in reducing population densities of R. solani AG-4 in soil and on roots and in reducing hypocotyl disease. Tolclofos-methyl and mepronil were similar to PCNB in efficacy. The effects of the biocontrol agents Gliocladium virens, Trichoderma hamatum, a binucleate Rhizoctonia CAG-2, and Pseudomonas cepacia were inconsistent, but all showed significant efficacy against R. solani AG-4 in one of the years. However, G. virens, T. hamatum, and CAG-2 all reduced yield in one or more years in artificially or naturally infested soil. Laetisaria arvalis did not control R. solani AG-4.