Pendulum, Arsenal, Oust, Escort, Velpar L and combinations for herbaceous weed control in loblolly pine plantations

Yeiser, J.L.; Howell, R.K.

Fifty years of weed science foundation for the future Proceedings Southern Weed Science Society, 50th annual meeting, Houston, Texas, USA, 20, 21, 22, January 1997: 94-98


Accession: 003226274

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Field trials were conducted at 2 sites in SE Arkansas to assess the impact of 22 herbicide treatments comprising Oust (sulfometuron) +or- Velpar L (hexazinone), Arsenal (imazapyr) +or- Oust, Escort (metsulfuron-methyl) or Pendulum (pendimethalin), and Pendulum alone for herbaceous control in the first two years of seedling establishment in Pinus taeda plantations. Results indicated that pendimethalin at 1.65-6.6 pounds/acre gave significantly the best vegetation control 6 and 12 weeks after treatment at both sites, although seedling growth was reduced. Many other treatments also provided good vegetation control together with strong seedling growth, particularly the Arsenal combination treatments. However, differences in herbicide performance between sites suggested a relationship between site characteristics, herbicide efficacy and seedling growth.