Effects of root dips of benomyl and captan on seedling response and mycorrhizal development of outplanted longleaf, sand, and loblolly pines
Longleaf pine seedlings inoculated with Pisolithus tinctorius (Pt) on naturally inoculated (NI) were grown at densities of 7-1/2 or 15 per square feet. Seedlings were graded by size and ectomycorrhizal development. The Pt group at 7-1/2 per square feet had 50% ectomycorrhiza with 70% formed by Pt. In the Pt-15 per square foot group, 65% had ectomycorrhiza, 90% of which were Pt. The NI-7-1/2 per square foot group had 20% feeder root with ectomycorrhiza and the NI-15 per square foot had ectomycorrhiza in 30% of the feeder roots. A split-plot design was used to isolate Pt and NI treatments on major plots and 12 minor plots within each were represented by 25 seedlings. One experiment will determine the effect of removal of ectomycorrhiza (stripping) on seedling performance in the field. Preliminary observations indicate that stripping 50% or more of the mycorrhizae substantially reduces survival. Another experiment will test the effects of benomyl and captan as dips of fungicide/clay slurries on mycorrhizal development and seedling response. 2 tables. (MF)
- Research Organization:
- Forest Service, Athens, GA (USA). Inst. for Mycorrhizal Research and Development
- DOE Contract Number:
- AI09-76SR00870
- OSTI ID:
- 6180462
- Report Number(s):
- SRO-870-21; ON: TI85002223
- Resource Relation:
- Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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