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Herbicidal Effects of Picloram on Bermudagrass

1971; Cambridge University Press; Volume: 19; Issue: 5 Linguagem: Inglês

10.1017/s0043174500050566

1550-2759

Larry Reber, R. K. Miller, J. A. Tweedy, Jeff Butler,

Plant and fungal interactions

The herbicide 4-amino-3,5,6-trichloropicolinic acid (picloram) was applied to several bermudagrasses ( Cynodon spp. ). Most of the grasses were susceptible to picloram; however, some were resistant and recovered within 16 months from the initial treatment. There were no detectable metabolites of 14 C picloram in bermudagrass (C. dactylon (L.) Pers. ‘U-3’) or common Kentucky bluegrass ( Poa pratensis L.). Also, there were no abnormal changes in cells of swollen nodes of picloram-treated bermudagrass that could explain the selective herbicidal injury of picloram on bermudagrass.