The yellow-headed spruce sawfly does inflict damage on Black Hills spruce. The first activity is seen in mid-June. Spray foliage when larvae are small (less than or equal to half the full-grown size) and before damage is extensive. Limit treatments to areas of plants where sawflies are feeding unless sawflies are widespread throughout the tree. Some pesticides suggested to use are: horticultural oil and insecticidal soap. Contact your local Cooperative Extension Service and request a list of recommended pesticides for this insect. Here is a link to more information :
Sawflies
These resources are brought to you by the Cooperative Extension System and your Local Institution
Welcome
eXtension is an interactive learning environment delivering the best, most researched knowledge from the smartest land-grant university minds across America.
eXtension: more mind reach
Have a question? Try asking one of our Experts
How and when do you treat for a sawfly infestation in Black Hills spruce trees? I am in Minnesota.
Last Updated: March 03, 2008
Have a specific question? Try asking one of our Experts
Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.
