Nematropica (2010) 40, 177-189

N. Kokalis-Burelle, E.N. Rosskopf and R.D. Hartman (2010)
Evaluation of soil treatments for control of Meloidogyne arenaria in Caladium tubers (Caladium x hortulanum) and nematode susceptibility of selected cultivars
Nematropica 40 (2), 177-189
Abstract: Field and greenhouse studies were conducted to assess the efficacy of soil fumigants for control of Meloidogyne arenaria on harvested caladium (Caladium x hortulanum) tubers, to determine the susceptibility of five commonly grown caladium cultivars to M. arenaria, and to evaluate effects of fumigation of previously uncultivated land on caladium production. In the fumigant effectiveness study, root condition was better and gall ratings were lower on caladium and tomato indicator plants for the dimethyl disulfide product, Paladin than for several Telone treatments and the untreated control. Of the two cultivars planted in the fumigant study, galling and M. arenaria J2 isolated from roots were both higher in 'White Delight' than 'Moonlight'. Evaluation of additional cultivars for susceptibility to M. arenaria showed that the standard hot water treatment employed by the grower as a pre-plant seed treatment was equally effective in disinfesting all caladium cultivars tested, with low numbers of viable root-knot nematode juveniles isolated from tubers following the treatment. Fumigation of previously fallow land with methyl bromide compared to non-fumigated land in the same field resulted in caladium shoot weights and root weights that were greater in methyl bromide treated soil than in untreated soil. However, root health was better in untreated soil, with no differences in galling or nematodes isolated from roots in the methyl bromide treated soil compared to the untreated soil. Evaluation of weeds as alternate hosts for root-knot nematodes in this field study revealed lower levels of galling in untreated soil compared with methyl bromide fumigated soil.
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Database assignments for author(s): Nancy Kokalis-Burelle, Erin N. Rosskopf

Research topic(s) for pests/diseases/weeds:
control - general
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne arenaria	Caladium (crop)	U.S.A. (SE)