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Carbofuran Affects Growth and Ectomycorrhizal Development of Loblolly Pine Seedlings

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Soil-incorporated carbofuran (FuradanĀ®) at 0.44 g active ingredient (AI) per seedling reduced ectomycorrhizal development by Pisolithus tinctorius and growth of 1-0 loblolly pine (Pinus taeda L.) seedlings after five months in a greenhouse test. Seedlings with P. tinctorius ectomycorrhizae and without carbofuran were significantly taller and had greater top, root, and total fresh weights than those with any other insecticide-symbiont combination. Ectomycorrhizal development by Thelephora terrestris was not significantly affected by carbofuran. Carbofuran, especially at 0.22 or 0.44 g AI per seedling, reduced seedling growth regardless of ectomycorrhizal status. Results of this greenhouse test suggest a biological interaction between carbofuran and ectomycorrhizal fungi; additional studies are needed to determine if this effect also occurs under field conditions. However, the use of this insecticide to control the Nantucket pine tip moth or the pales and the pitch-eating weevils in outplantings has the biological potential to decrease the benefits of specific ectomycorrhizae to the survival and growth of loblolly pine.

Document Type: Journal Article

Affiliations: Director and chief plant pathologist, Institute for Mycorrhizal Research and Development, Southeastern Forest Experiment Station, USDA Forest Service, Athens, Georgia 30602

Publication date: 1984-02-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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