A critical-point yield loss model for Cylindrocladium black rot of peanut

Pataky, J.K. and Beute , M.K. and Wynne, J.C. and Carlson, G.A. (1983) A critical-point yield loss model for Cylindrocladium black rot of peanut. Phytopathology, 73 (11). pp. 1559-1563.

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Abstract

Groundnut yield losses due to C. crotalariae were estimated for 2 commercial cultivars and 2 advanced-generation breeding lines which were evaluated in 10 field trials in 4 N. Carol. counties in 1980, 1981 and 1982. Results from trials in stratified fields and established plots, and from C. black rot simulations, were similar for a highly susceptible commercial cultivar (Florigiant), a moderately resistant one (NC 8C) and a highly resistant breeding line (NC 18229). A critical-point model for predicting incidence of C. black rot c. 1 wk before digging explained disease incidence-yield relationships when yield was expressed as the percentage of the max. yield at a location. Critical-point models for Florigiant, NC 8C and NC 1229 were obtained. In trials where epidemics developed naturally, mean incidence 1 wk before digging were 0.21-0.74, 0.17-0.53 and 0.13-0.33 and mean predicted yield loss 15-53%, 13-40% and 9-22% for Florigiant, NC 8C and NC 18229, respectively. A single critical-point model was not applicable over locations for NC 18016, which appeared to be less agronomically stable than the other lines evaluated in this study

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Arachis hypogaea, Cylindroclodium crotalariae, disease loss assesment, epidemiology
Author Affiliation: North Carolina State Univ., Raleigh, USA
Subjects: Plant Production
Statistics and Experimentation
Crop Improvement
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 21 Jul 2013 13:31
Last Modified: 21 Jul 2013 13:31
URI: http://eprints.icrisat.ac.in/id/eprint/11164

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