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Title: Use of spirotetramat in the post-plant management of root-knot nematode in eggplant and peach

Author
item SHIRLEY, ANDREW - University Of Georgia
item Nyczepir, Andrew
item BRANNEN, P - University Of Georgia
item NOE, JAMES - University Of Georgia

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: 5/17/2012
Publication Date: 8/13/2012
Citation: Shirley, A., Nyczepir, A.P., Brannen, P.M., Noe, J.P. 2012. Use of spirotetramat in the post-plant management of root-knot nematode in eggplant and peach. Journal of Nematology. 44:491.

Interpretive Summary:

Technical Abstract: Historically peach production and IPM management of nematodes has relied almost solely on pre- and post-plant applications of nematicides in the southeastern United States. Currently Telone II is the primary preplant fumigant used by peach growers, since methyl bromide and fenamiphos, the only post-plant nematicides, are no longer available. There has recently been an interest in the development of post-plant nematicides. Movento (spirotetramat; a synthetic tetramic acid, Bayer CropScience) has shown some promising nematicidal effects and is currently being evaluated on peach in the Southeast. Movento is currently registered as a broad-spectrum insecticide on peach and is classified as a Group 23 lipid biosynthesis inhibitor. Two studies using Movento were conducted from 2011-2012 with Meloidogyne incognita infected eggplant and peach using various rates of spirotetramat. The first study with eggplant cv. ‘BlackBeauty’ was performed in an attempt to establish efficacious rates for the peach studies. The study consisted of three treatments: i) Movento (0.63 kg ai/h), ii) adjuvant control, and iii) a nematode control. Each treatment was replicated six times in a randomized complete block design. All plants were inoculated with 20,000 M. incognita eggs and treatments were applied 10 days later. Soil samples were collected 30 and 60 days after treatment application (DAT). At 60 DAT, number of nematode eggs and dry shoot and root weights were determined. Treatment with Movento resulted in lower (P < 0.05) M. incognita reproduction and greater dry shoot and root weights as compared to untreated controls. A similar experiment was completed with M. incognita and ‘Lovell’ peach seedlings; treatments included: i) two rates of Movento (0.42 and 0.63 kg ai/h), ii) water control, iii) nematode control, and iv) adjuvant control. Each treatment was replicated eight times in a randomized complete block. All plants were inoculated with 20,000 M. incognita eggs and treatments were applied after 10 days. Nematode assays and plant growth data were collected as previously described for the eggplant experiment. Treatment of peach with Movento at the 0.42 kg rate reduced (P < 0.05) numbers of M. incognita J2 in the soil at 30 DAT, but no differences were detected at 60 days. Both studies will be repeated.