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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Research Unit » Research » Publications at this Location » Publication #164311
Title: EFFICACY OF SELECTED BIOLOGICAL NEMATICIDES ON PRATYLENCHUS PENETRANS IN VITRO AND AFFECTING STRAWBERRY

Author
item Pinkerton, John
item Kitner, Megan

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: 5/20/2004
Publication Date: 2/1/2005
Citation: Pinkerton, J.N., Kitner, M.L. 2005. Efficacy of selected biological nematicides on Pratylenchus penetrans in vitro and affecting strawberry. Journal of Nematology.

Interpretive Summary:

Technical Abstract: Seven biological products reported to have nematicidal or nematistatic, plant-resistance-inducing properties, were evaluated for the suppression of P. penetrans in vitro and on 'Totem' strawberry plants. Mobility of nematodes was evaluated in vitro by exposing nematodes to 1200, 2400, or 4800 ppm of nematicide solutions for 24, 48, and 74 h; mobility was also evaluated 24 h after rinsing nematodes in deionized water. During the first 72 h, mobility was reduced 60-80% in Nemacur at 100 and 200 ppm, 28-80% in DiTera, and 28-58% in Dominator solutions. Most nematodes remained mobile in the other treatments (nematicidal castor oil, Promax, LCF, Sinosin). Except for Nemacur and DiTera at 4800 ppm, most nematodes recovered mobility following rinsing. Strawberry crowns were planted in pots containing ca. 2700 g of loam:sand (2:1) infested with 1.5 nematode g-1 soil. Nematicide solutions were applied at concentrations recommended by the manufacturers as drenches to soil field capacity. Applications were made at 28 day intervals starting at planting (preplant) or 30 days after planting (post-plant), except DiTera which was applied at 14 day intervals. Nemacur at 100 ppm, non-infested plants, and infested non-treated plants served as controls. Plants were maintained at 20-24 C with a 16 h photoperiod and fertilized with each nematicide application. Plant growth and nematode population densities were assessed 16 weeks after the first nematicide application. Nemacur, Dominator, DiTera, and SLS suppressed nematode populations in the roots better than Promx, LCF, castor oil, and Sinosin. Biomass of roots and crowns was greatest with Nemacur, Dominator, DiTera, and Promax. In both studies, several products demonstrated potential for P. penetrans control, but none was as effective as Nemacur.