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The Ovicidal Activity of Tracer* Naturalyte* Insect Control Against Heliothine Species in Conventional Cotton

I. G. Peterson, G. A. Herzog, J. A. Durant, P. F. Pilsner, S. Micinski, L. L. Larson, B. A. Nead-Nylander, R. M. Huckaba and D. J. Porteous


The ovicidal and ova-larvicidal activity of Tracer Naturalyte insect control was compared to that of the commercial standards, Ovasyn (amitraz, AgrEvo), Larvin (thiodicarb, Rhone-Poulenc) and Lannate (methomyl, DuPont). Three laboratory studies and three field treated trials demonstrated that Tracer will provide both ovicidal and ova-larvicidal activity to freshly lain eggs of Heliothis virescens and Helicoverpa zea in cotton. The labeled rate of 0.06 lb ai/A of Tracer, foliar applied to Heliothine eggs less than 24 hours old, gave ovicidal activity equivalent to the standards at their published ovicidal rates, and ova-larvicidal activity to the hatching and newly hatched larvae that was superior to the standards. As an added IPM benefit, Tracer, Ovasyn and Larvin allowed natural parasitism by Trichogramma sp. to occur at a level equal to the non-treated control. Levels of parasitism in the Lannate treated plots were significantly reduced.

Reprinted from Proceedings of the 1998 Beltwide Cotton Conferences pp. 1209 - 1211
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998