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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Issue 70 (1965) → Maleic Hydrazide Unsuitable for Controlling Height Growth of Green Ash and Shumard Oak Seedlings

Maleic Hydrazide Unsuitable for Controlling Height Growth of Green Ash and Shumard Oak Seedlings

In southern nurseries, hardwood seedlings often grow so large that they are difficult to lift and plant. In a study at the Southern Hardwoods Laboratory, maleic hydrazide (MH ) was tested as a means of halting height growth when seedlings reach suitable size. Seeds of green ash (Fraxinus pennsylvanica Marsh.) and Shumard oak (Quercus shumardii Buckl.) were nursery sown during the summer of 1961. When the seedlings were 15 inches tall (August 1), 30,000 and 15,000 p.p.m. were applied as sprays; the sprays were in amounts sufficient to run off the leaves.


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Author(s): Franklin T. Bonner

Publication: Tree Planters' Notes - Issue 70 (1965)