Control of Root-Knot Nematodes and the Colorado Potato Beetle on Potatoes with In-Furrow Applications of Systemic Nematicides

Abstract

Aldicarb (Temik 15G), phenamiphos (Nemacur 15G), carbofuran (Furadan 10G), and oxamyl (Vydate 10G) were applied in-furrow at 1, 2, 3, 4, and 6 lbs a.i./acre to determine their effectiveness for control of Meloidogyne arenaria (Neal) Chitwood and the Colorado potato beetle (Leptinotarsa decemlineata Say) on potatoes. Significant control (P = 0.05) of M. arenaria was obtained with aldicarb at all rates, phenamiphos at 2, 3, 4, and 6 lbs a.i./acre, and oxamyl at 3 and 4 lbs a.i./acre. All treatments with aldicarb, phenamiphos, and oxamyl resulted in significant (P = 0.05) yield increases. Treatments with carbofuran did not increase yield and only the three highest rates reduced populations of root-knot nematode larvae in soil. Use of the nematicides resulted in significant control of the potato beetle at all rates tested.