Evaluation of Root-knot Nematode (RKN) Resistant Peanut Varieties and a Plant Growth Regulator (PGR) in Southwest Georgia
Applied Research
Braxton Crews
Marion/Webster ANR Agent
University of Georgia
Preston
Abstract
Root-knot nematodes (RKN) are a common problem in Southwest Georgia row crop fields, particularly in those with lighter, sandy soils. RKN feed on plant roots which leads to a decline in plant death and in severe infestations, a decrease in peanut yield. Planting RKN-resistant peanut varieties is the most economical method to combat this pest, but oftentimes the resistant varieties do not yield as well as the traditional susceptible varieties such as Georgia 06-G. Additionally, many of the RKN-resistant varieties exhibit excessive vine growth, leading to an increase in interest in the use of plant growth regulators (PGRs). In this study, four RKN-resistant peanut varieties (Georgia 22-MPR, TifNV-HG, TifNV-hiol, and Georgia 14N) were evaluated for yield, tomato spotted wilt virus (TSWV) incidence, and taste. In addition, the effects of the PGR product Kudos on the yield of the susceptible variety Georgia 06-G was evaluated. The RKN-resistant TifNV-HG variety out yielded all other varieties (5,958 lbs/acre), including the susceptible Georgia 06-G (5,023 lbs/acre) and the older RKN-resistant variety Georgia 14N (5,165 lbs/acre). The application of the PGR product Kudos did alter the growth habit of the plants (mainstem height and height-to-node ratio), but did not result in increased yield. Further development and testing of RKN-resistant varieties will be of paramount importance in the future as Georgia peanut growers continue to battle Root-knot nematodes.
Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: Braxton Crews
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Crews, B. Marion/Webster ANR Agent, University of Georgia, Georgia, 31824