Effects of Fumigant and Nonfumigant Nematicides on Pratylenchus penetrans and Yield of Potato.

In 1984-85 metham-sodium and the combination of 1,3-dichloropropene plus aldicarb decreased (P = 0.05) soil population densities of Pratylenchus penetrans at planting, midseason, and at harvest relative to the untreated control. These treatments increased (P = 0.05) marketable potato tuber yield from 27% to 46% in 1984 and from 23% to 37% in 1985, as compared with the control. In 1984 oxamyl (10% granular and 24% liquid) applied immediately after planting increased (P = 0.05) only the total yield; oxamyl applied 2 weeks after planting failed to control P. penetrans and to increase total or marketable yields. Oxamyl (10 G) applied 2 weeks after planting decreased (P = 0.05) Pf. In 1985 oxamyl (10 G) reduced (P = 0.05) P. penetrans population densities at midseason and harvest, whereas oxamyl (24 L) reduced only harvest population densities. In 1985 neither formulation of oxamyl increased tuber yield.

[1]  T. Olthof,et al.  Growth of Potato and Control of Pratylenchus penetrans with Oxamyl-treated Seed Pieces in Greenhouse Studies. , 1988, Journal of nematology.

[2]  T. Olthof.  Effects of Fumigants and Systemic Pesticides on Pratylenchus penetrans and Potato Yield. , 1987, Journal of nematology.

[3]  R. Loria,et al.  Fall fumigation of potato with 1,3-dichloropropene: efficacy against Pratylenchus crenatus, yield response, and groundwater contamination potential , 1987 .

[4]  J. Kimpinski.  Effects of aldicarb and oxamyl on Pratylenchus penetrans and potato yields. , 1986 .

[5]  T. Olthof.  Reaction of Six Solanum tuberosum Cultivars to Pratylenchus penetrans. , 1986, Journal of nematology.

[6]  T. Olthof,et al.  Oxamyl in the Control of Pratylenchus Penetrans on Potatoes , 1985 .

[7]  R. Rowe,et al.  Synergistic interactions between Verticillium dahliae and Pratylenchus penetrans in potato early dying disease. , 1985 .

[8]  T. Olthof.  Reaction of six potato cultivars to Pratylenchus penetrans , 1983 .

[9]  R. Anderson,et al.  Plant-parasitic nematodes associated with potatoes (Solanum tuberosum L.) in Simcoe County, Ontario. , 1982 .

[10]  T. Olthof.  Effect of Age of Alfalfa Root on Penetration by Pratylenchus penetrans. , 1982, Journal of nematology.

[11]  J. R. Proctor,et al.  The Determination of Normalizing Transformations for Nematode Count Data From Soil Samples and of Efficient Sampling Schemes , 1974 .

[12]  T. Olthof,et al.  The relationship between population densities of Pratylenchus penetrans and crop losses in summer-maturing vegetables in Ontario. , 1973 .

[13]  J. Townshend.  A Modification and Evaluation of the Apparatus for the Oostenbrink Direct Cottonwool Filter Extraction Method1) , 1963 .