Systemic Nematicides for Control ofPratylenchus penetransDuring Apple Orchard Establishment in Ontario

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Abstract
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 2 generations of spotted tentiform leafminer [Phyllonorycter blancardella]. Use of either chemical alone gave nematode control and growth response, but only the oxamyl foliar overspray gave leafminer control.