Preemergence weed control in slash (Pinus elliottii) and loblolly pine (Pinus taeda) seedbeds

Carter, M.C.; Dill, T.R.

Proceedings 25th Annual Meeting Southern Weed Science Society: 219


Accession: 000166665

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Plots at various locations in 12 states were sown with P. elliottii and P. taeda, treated with herbicides 24 h later and irrigated with 0.5 to 0.75 inches of water. Prometryne at 2 and 4 lb/acre gave good to excellent weed control at all locations except Mississippi, where soil o.m. averaged 5.5%. The higher rate of prometryne produced noticeable tip burn at several nurseries and caused a slight reduction in yield in Kentucky, Tennessee and Virginia. GS-16 068 (2-ethylthio-4,6-bis(isopropylamino)-1,3,5-triazine) was nearly as effective as prometryne and produced no seedling injury. Trifluralin and diphenamid were non-injurious to the seedlings and gave good to excellent control at the 7 locations where grasses predominated.