Systemic Nematicides for Control of Pratylenchus penetrans During Apple Orchard Establishment in Ontario. P. W. Johnson, Agriculture Canada, Research Station, Delhi, Ontario N4B 2W9. V. A. Dirks, Agriculture Canada, Research Station, Harrow, Ontario N0R 1G0, D. J. Pree, Agriculture Canada, Research Station, Vineland Station, Ontario L0R 2E0, and C. F. Marks, Agriculture Canada, Research Station, Harrow. Plant Dis. 66:299-301. Accepted for publication 5 June 1981. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1982. DOI: 10.1094/PD-66-299.

The combination of a soil application of aldicarb plus a foliar overspray of oxamyl was a practical and effective method of establishing apple orchards on soil infested by the root-lesion nematode. This treatment combination resulted in increased trunk girth, reduced soil and root nematode populations, and controlled the first two generations of spotted tentiform leafminer. Use of either chemical alone gave nematode control and growth response, but only the oxamyl foliar overspray gave leafminer control.

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