DEVELOPMENT OF IMPROVED PEANUT GERMPLASM AND RESISTANCE TO DISEASE AND NEMATODE PESTS
Location: Crop Genetics and Breeding Research
Title: Assessment of NemOut (Paecilomyces lilacinus) for Management of Meloidogyne arenaria Race 1
Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 1, 2009
Publication Date: January 15, 2010
Citation: Kemerait, R., Sanders, F.H., Dong, W., Holbrook Jr, C.C., Timper, P., Rich, J.R. 2009. Assessment of NemOut (Paecilomyces lilacinus) for Management of Meloidogyne arenaria Race 1. Proceedings American Peanut Research and Education Society 41:72.
Interpretive Summary: not required
Peanut root-knot nematode, Meloidogyne arenaria race 1, will cause considerable damage to the peanut crop in the southeastern United States if not adequately managed. Field trials were conducted at the North Florida Research and Education Center, Marianna, in 2006, 2007, and 2008 and at the Coastal Plain Experiment Station, Tifton, GA in 2007 and 2008 to assess the efficacy of NemOut, a commercial formulation of the biological control agent Paecilomyces lilacinus, to reduce damage from the peanut root-knot nematode and to improve yield. Treatments included in these studies were Thimet (5 lb/A) as a control, Temik 15G (10 lb/A) at-plant and/or at-pegging time, Telone II (4.5-6 gal/A), NemOut HB (dry hopper box treatment, 0.5 lb/100 lb seed), NemOut SP (0.3 lb/A) and NemOut WP (0.15-0.3 lb/A). Peanut cultivars ‘AP3’, ‘Georgia Green’, ‘C99R’, ‘Tifguard’, and a susceptible isoline to Tifguard were planted in plots naturally infested with M. arenaria race 1 in one or more trials. In Marianna, nematode populations were typically not statistically different among treatments. Pod quality, measured on a scale of 1-5 for damage from root-knot nematodes was similar among all treatments. Yields were always numerically greater in plots treated with Temik 15G or NemOut than in those treated with Thimet alone. In 2006 and 2008, at least some treatments that included NemOut yielded better than the control and as well or better than the treatments with Temik 15G. In Tifton in 2007, both Tifguard and the isoline breading line had lower root gall ratings and better yields than Georgia Green. Although often numerically greater than the control, no nematicide treatment statistically improved yields over the control for any cultivar in this study. In 2008, only combined use of Telone II and Temik 15G resulted in a significant reduction in nematode population; however there was no statistical difference among root gall ratings at the end of the season among treatments. Only a combination of NemOut at-plant and Temik 15G at-pegging time significantly improved yields over the control.