Skip to Questions

Ask PHS

Useful Tip: Start typing the question or type the keywords you are interested in. If your question hasn't been asked yet an email form will appear.
Q

How would you organically treat "hemlock wooly adelgids"

Last Updated: Sep 17, 2013  |  13 Views

Was this helpful? 0   0
A

Answer

You can use horticultural oil (not dormant oil) to the point that it drips off.  You must be vigilant to spray the last week in April and the last week in September.  This must be done every year. This should get you control by smothering them at an immature stage.

Answered by Aska GardenerBookmark and Share

Other Answers / Comments (0)

    More Ways to Ask Questions