Colorado Potato Beetle Control, Johnston County, 1988

Abstract

Abstract 'Atlantic' potatoes were planted 14 Apr, near Benson, NC. Single row plots, 10 ft long on 42 inch centers were replicated 4 times in a randomized complete block design. Alleys of 5 ft separated replicates. Treatments were applied using a CO2 pressurized sprayer with a single hollow cone nozzle (18 × ) operating at 60 psi to apply 80 gal/acre. Treatments were applied 24 May (all treatments), 31 May (Trident, Trident + Nufilm, and M-One, 2 rates), 8 Jun (Trident, Trident + Nufilm, M-One, 2 rates, and Rotenox), 1 Jul (all), and 6 Jul (Trident, Trident + Nufilm, and M-One, 2 rates). Visual estimates of foliar damage and/or insects counts were made 30 May, 6, 13, 20, 27 Jun, 5, 11, and 25 Jul. Adults were counted by walking the length of the plot and counting all visible adults. Egg masses and larvae were counted on 3 hills/plot. Small larvae were estimated to be 1st and 2nd instars, and large 3rd and 4th. Potatoes were harvested and yields recorded on 25 Jul.

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