Effects of Carbofuran and Thiabendazole on Incidence of Pitch Canker of Loblolly Pine. G. B. Runion, Former Graduate Research Assistant, Department of Plant Pathology, North Carolina State University, Raleigh 27695-7616. S. C. Cade, and R. I. Bruck. Manager, Southern Forestry Research Center, Weyerhaeuser Co., Hot Springs, AR 71902; and Professor, Department of Plant Pathology, North Carolina State University, Raleigh 27695-7616. Plant Dis. 77:166-169. Accepted for publication 3 November 1992. Copyright 1993 The American Phytopathological Society. DOI: 10.1094/PD-77-0166.

In eastern North Carolina, the percentage of loblolly pine (Pinus taeda) seedling terminals damaged by pine tip moths (Rhyacionia spp.) was positively correlated with the percentage of terminals infected with the pitch canker fungus, Fusarium subglutinans. The insecticide carbofuran reduced terminal shoot infection by F. subglutinans and terminal shoot damage by pine tip moths, and seedlings were significantly taller than when no carbofuran was used. Multiple applications of the fungicide thiabendazole significantly lowered the percentage of infected terminals and resulted in significantly taller seedlings compared to no thiabendazole but did not affect damage by pine tip moths.