Help..my tree is INFESTED

Question: With these little black worms..maybe will develope into Moths ??  Will Raid kill them ???

responder: Take care,  Replied April 17, 2023, 11:59 AM EDT
response: Hello Tamara, Do you have any images of the worms? This will help our expert when suggesting a solution.

responder: The Question Asker Replied April 17, 2023, 12:07 PM EDT
response: Tiny black. Too small to see w/camera. Lots of legs like catapillers??  Nest ?of some sort like spiderwebbing. On April 17, 2023, at 8:59 AM, Ask Extension <<personal data hidden>> wrote:

responder: An Ask Extension Expert Replied April 19, 2023, 1:25 PM EDT
response: Tamara: I cannot ID the pest with out a good picture. I am doing some guessing so I will need some help from you. You stated there was webbing. Are the caterpillars on this webbing? I am sure the caterpillars are small, but a picture may be helpful. Using Raid would ‘NOT’ be a good idea as that pesticide is for different insects.  Do you know what kind of tree this is? How long has this pest problem been going on? Thanks for any additional information you can share. Rich

responder: The Question Asker Replied April 19, 2023, 11:04 PM EDT
response: On Wed, Apr 19, 2023, 10:25 AM Ask Extension <<personal data hidden>> wrote:

responder: The Question Asker Replied April 19, 2023, 11:04 PM EDT
response: On Wed, Apr 19, 2023, 10:25 AM Ask Extension <<personal data hidden>> wrote:

responder: An Ask Extension Expert Replied April 21, 2023, 12:06 PM EDT
response: Tamara: This is a good picture of the insect, thanks. You have tent caterpillars. Do you know the name of the tree you have here as it might make a difference in the management/treatment of the pest. I have copied some links that may be of help to you. It’s about the pest not the plant it eats. Alder (Alnus)-Western tent caterpillar | Pacific Northwest Pest Management Handbooks (pnwhandbooks.org) Management-biological control See: Biological Control of Nursery Pests Tent caterpillars have many natural enemies. Some birds eat caterpillars, and small mammals consume the pupae. The larvae of a tachinid fly parasitizes the caterpillars. Management- cultural control Overwintering egg masses can be removed and destroyed when practical. Management-chemical control Dormant-season spray oil spray Apply with enough water to cover the entire tree thoroughly. Apply in delayed-dormant period to destroy overwintering egg masses. Let me know if you have additional questions. Rich

responder: The Question Asker Replied April 21, 2023, 1:53 PM EDT
response: Thank you for your help! We thi nk it's a Douglas..Huge..grown to amazing size in 14 yrs..trunk now about 5 ft around.!!On Fri, Apr 21, 2023, 9:06 AM Ask Extension <<personal data hidden>> wrote:

responder: The Question Asker Replied April 21, 2023, 1:59 PM EDT
response: Only full size pic On April 21, 2023, at 9:06 AM, Ask Extension <<personal data hidden>> wrote:

responder: An Ask Extension Expert Replied April 21, 2023, 2:25 PM EDT
response: Tamara: This is not a Douglas Fir. I am guessing a non-native ornamental fir. The treatments listed in my earlier note should still apply. Rich

responder: The Question Asker Replied April 21, 2023, 2:32 PM EDT
response: Thank you! On Fri, Apr 21, 2023, 11:25 AM Ask Extension <<personal data hidden>> wrote:

responder: An Ask Extension Expert Replied April 21, 2023, 3:29 PM EDT
response: Most welcome, let me know how it goes. Rich