Management of plant-parasitic nematodes on peach utilizing post-plant nematicides and crop rotations
Shirley, Andrew Mitchell
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Given the rising cost of pre-plant fumigant applications, like Telone II (1,3-dichloropropene) and Vapam (metam-sodium), the question of their future availability, and the fact that effective control of nematodes by fumigants is short lived, much effort has gone towards developing sustainable post-plant nematode control options in perennial crops, like peach. In the greenhouse, two post-plant nematicides were applied to nematode-infested peach seedlings and evaluated for their suppression of nematode reproduction. At 40 days after inoculation (DAI), a single application of Movento at (0.42 kg/ha) and MCW-2 at (0.014 kg/ha) significantly reduced M. incognita populations; no effect was seen at 70 DAI. At 30, 60, and 90 DAI MCW-2 at 0.014 kg/ha significantly reduced M. xenoplax numbers; no effect was seen with Movento at 30, 60, or 90 DAI. A dual application of Movento reduced M. incognita numbers at 0.42 and 0.63 kg ai/ha, 40 DAI; with no effect observed 70 DAI. A dual application of Movento on M. xenoplax infested plants had no effect at 30, 60, and 90 DAI. In a separate study, the host susceptibility of Jesup (Max-Q) tall fescue was evaluated against M. floridensis in a series of greenhouse trials. Meloidogyne floridensis was found to reproduce on Jesup (Max-Q), but was classified to be a poor host in two of three trials.