Studies on the Incidence and Controlling Method of Dried-up Die-back of Loblolly Pine
- Received Date: 1997-01-06
- Available Online: 2012-03-17
Abstract: The incidence of dried-up die-back of loblolly pine begins in June,it becomes more serious during the dry season from July to September,but the whole process of pathological changes is slow.Three-year experiments have showed that it will achieve good effects to apply sodium borate,compound fertilizer of minor element,ammonium molybdate and citrus minor element fertilizer to the roots or crown of the pines in May or June.The controlling effect of sodium borate,which is applied to the roots 23~25 g/plant yearly or to the crown with its 0.2% water solution,is especially good and stable.This can be popularied and applied in the production.