Efficacy of Prodiamine for Weed Control in Container Grown Landscape Plants Under High Temperature Production Conditions.

by Sharon A. Duray, and Fred T. Davies, Jr.

Applications of preemergent herbicide prodiamine 65 EDG (wettable dry gramule) (2,4-dinitro-N3, N3-dipropyl-6(trifluoromethyl)-1,3-benzenediamine) at 1.12, 2.24, 4.48, and 8.96 kg ai/ha (1.0, 2.0, 4.0, and 8.0 lb ai/A) controlled large crabgrass (Digitaria sanguinalis L. Scop.), bermudagrass (Cynodon dactylon L. Pers.), purslane (Portulaca oleracea L.), and red sorrel (Rumex acetosella L.) for 16 weeks after application. A granular application at 1.12 kg ai/A) resulted in unsatisfactory weed control and subsequently decreased shoot weight of container grown landscape plants. Prodiamine 65 WDG did not cause phytotoxic effects to landscape plants at any rate evaluated.

J. Environ. Hort. 5(2): 82-84, June 1987.