Effect of Horticultural Oil, Insecticidal Soap, and Film-Forming Products on the Western Flower Thrips and the Tomato Spotted Wilt Virus. W. R. Allen, Agriculture Canada, Research Station, Vineland Station, ON, Canada, LOR 2EO. B. Tehrani, and R. Luft. Agriculture Canada, Research Station, Vineland Station, ON, Canada, LOR 2EO. Plant Dis. 77:915-918. Accepted for publication 4 June 1993. Copyright 1993 Department of Agriculture, Government of Canada. DOI: 10.1094/PD-77-0915.

Horticultural oil, insecticidal soap, and film-forming products were tested for their efficacy in reducing transmission of the tomato spotted wilt virus (lettuce serotype) and feeding and reproduction of the western flower thrips (Frankliniella occidentalis). Wilt-Pruf, oil, and Dow Corning 36 products reduced virus transmission by 73, 57, and 46%; and feeding activity by 40, 4, and 41%, respectively. Only Dow Corning 36 significantly reduced (66%) reproduction.