Abstract

Flutolanil (SN 84364) was evaluated in vitro against Sclerotium rolfsii and Rhizoctonia solani AG-4. ED50 values were < 0.01 and < 0.1 μgmL for S. rolfsii and R. solani, respectively, while Pentachloronitrobenzene (PCNB) had ED50 values of < 0.1 and < 1.0 μgmL, respectively. Concentrations of flutolanil at 0.1 μgmL greatly reduced sclerotia and sclerotia initial development of S. rolfsii. Field evaluations were conducted near Tifton, GA, during 1983-86 for control of southern stem rot (S. rolfsii) and Rhizoctonia limb rot (R. solani AG 4) on peanut (Arachis hypogaea L.). Flutolanil 50 WP applied as a banded (40 cm) foliar spray at rates of 1.12-5.6 kg ai/ha at pegging (about 60 days post seeding) significantly (P = 0.05) decreased both disease loci numbers caused by S. rolfsii and percentage of vines infected with R. solani. Yields were increased significantly (P = 0.05) in all treatments over the four years of trials. Flutolanil 7 G was significantly (P = 0.05) less effective in controlling southern stem rot and increasing yield than the 50 WP formulation.

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Keywords: white mold, Ground nuts, Rhizoctonia

How to Cite:

Csinos, A., (1987) “Control of Southern Stem Rot and Rhizoctonia Limb Rot of Peanut with Flutolanil”, Peanut Science 14(2), p.55-58. doi: https://doi.org/10.3146/i0095-3679-14-2-1