Tolerance of young Loblolly pine (<i>Pinus taeda</i>) seedlings to post-emergence applications of MSMA

Authors: David B. South, Scott A. Enebak, Thomas E. Hill
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 2007, Issue N.Z.J.For. 52(3) 2007, pp 28-35, Nov 2007
Publisher: New Zealand Institute of Forestry

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Abstract: Nursery trials were conducted in 2005 and 2006 to determine the tolerance of bare-root loblolly pine (Pinus taeda L.) seedlings to the herbicide MSMA. Seedlings in five nurseries were treated 4 to 14 weeks after sowing at rates up to 2.24 kg/ha. Seedlings sampled in the fall showed no signs of shoot or root injury. MSMA treated seedlings were not statistically smaller than those lifted from control plots. MSMA is used in cotton (Gossypium hirsutum L.) fields and could prove useful for selectively controlling sedges in pine nurseries. However, since MSMA contains arsenic, the use of this herbicide will not be allowed in nurseries that supply seedlings to plantations certified by the Forest Stewardship Council.

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