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Mist Blowers as a Nursery Tool

In the Douglas-fir region the trend is toward larger planting stock and older age classes. To some nurseries this means a 2- to 3-million-tree transplanting program. In areas of heavy vegetative competition, the larger sized planting stock is gaining in preference. Because these areas also abound with rodents, a foliar repellent spray needs to be applied as a defense against browsing and clipping by these animals. Initial repellent treatments in the nurseries of the Northwestern States were made on seedlings in beds averaging 50 seedlings per square foot. At this density conventional agricultural spraying equipment could do an adequate job at a nominal cost per thousand seedlings sprayed. When the same equipment was used to spray transplants at a density of from 6 to 8 per square foot, the costs of material and application per thousand trees skyrocketed.


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Author(s): Homer S. Ward

Publication: Tree Planters' Notes - Issue 54 (1962)