1Cooperative investigations of the Agricultural Research Service, U.S. Department of Agriculture, and The Virginia Polytechnic Institute and State University. Research was supported in part by ARS grant No. 12-14-7001-855.
Cylindrocladium black rot (CBR) of peanuts (Arachis hypogaea L.), caused by Calonectria crotalariae (Loos) Bell & Sobers (Cylindrocladium crotalariae (Loos) Bell & Sobers), is potentially one of the most serious peanut diseases in Virginia. Over 60 peanut lines at multiple locations and 140 peanut lines at a single location were screened in the field for resistance to CBR from 1973-1977 in Virginia and North Carolina. Susceptibility to CBR was determined by number of dead plants per plot in 1973 and by percent dead plants per plot in 1974-1977. In addition, in 1974, 1975 and 1977, visual estimates of CBR damage to roots and pods were made. Florigiant, Spancross, VGP 1 and/or NC 3033 were used as checks to determine relative susceptibility.
Results generally indicate that spanish-type peanuts are the most resistant to CBR, valencia-type peanuts the least resistant and Virginia-type peanuts intermediate. Florigiant was consistently one of the most susceptible genotypes, while NC 3033, Spancross and VGP 1 were among the most resistant. Four valencia-type peanuts, 22 virginia-type peanuts, 28 spanish-type peanuts, one segregating line, and one wild species (
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Keywords: Groundnut, Cylindrocladium Crotalariae, Calonectria crotalariae, Genetic Vulnerability, Disease resistance, plant breeding
How to Cite:
Coffelt, T. & Garren, K., (1982) “Screening for Resistance to Cylindrocladium Black Rot in Peanuts (Arachis hypogaea L.)¹”, Peanut Science 9(1), p.1-5. doi: https://doi.org/10.3146/i0095-3679-9-1-1