Manually remove caterpillars in light infestations or soak with a spot spray of horticultural oil. An email dialog among extension specialists this week focused on pruning of Christmas trees. This is the recommended time to prune true fir and douglas fir, but growers were wondering if trees should be pruned now with our existing drought. The specialists agree with this concern and recommend no pruning now. Hopefully, we'll get some rain soon and after a month damage symptoms will show up.
Growers can prune off scorched foliage.
John C. Nye, Dean and Director. Distributed in furtherance of Acts of Congress of May 8 and June 30, 1914. It is the policy of the Delaware Cooperative Extension System that no person shall be subjected to discrimination on the grounds of race, color, sex, disability, age, or national origin.