Abstract
Pentachloronitrobenzene (PCNB) 10G and PCNB + ethoprop 103G applied on 10-cm (narrow) and 25-cm (wide) band widths, respectively, were evaluated for the control of southern stem rot (Sclerotium rolfsii) and impact on yield of peanut. On-farm evaluations with PCNB were done in 1988 to 1990, while PCNB + ethoprop and diniconazole 25W were tested in 1989 and 1990. Narrow band width (10-cm) applications of the 5.6 kg a.i.ha rate of PCNB significantly reduced disease and increased yield all three years compared to the control; the 11.2 kg a.i.ha rate applied on the wide band width (25-cm) reduced stem rot incidence two of three years. The narrow and wide band width applications of PCNB + ethoprop at 5.6 + 1.7 kg a.i.ha and 11.2 + 3.3 kg a.i.ha resulted in reduced southern stem rot incidence and higher yields than the control. Disease control and yield response with PCNB + ethoprop were similar to those in plots treated with PCNB on the narrow and wide band widths. Diniconazole 25W, which was broadcast twice at 0.28 kg a.i.ha in 1989 and 1990, gave better disease control and higher yields than PCNB and PCNB + ethoprop only one of two years.
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Keywords: Arachis hypogaea, Sclerotium rolfsii, Groundnut, white mold, Terraclor, Terraclor + Mocap, Spotless, quintozene
How to Cite:
Hagan, A. & Weeks, J. & Bowen, K., (1991) “Effect of Placement and Rate of PCNB and PCNB + Ethoprop On The Control Of Southern Stem Rot Of Peanut¹”, Peanut Science 18(2), p.94-97. doi: https://doi.org/10.3146/i0095-3679-18-2-8