Worms in trees

Farming and rural life discussion forum. Cooking, hunting, gardening, fishing, critters, etc.

Moderator: Team Cub

Worms in trees

Postby technova » Mon Sep 11, 2006 12:04 pm

I have white worms/caterpillars eating the needles on my white pines again.
They only bother the smaller (under 10 ft) trees and are killed with a water and detergent mix. I have been spot spraying the groups with a hand sprayer and spraying the entire tree with a garden hose sprayer.
They are similar to the tent worms but don't build a tent. They don't bother the spruce or arbavitae(?) next to the pines.

Does anyone know a preventative measure to keep them away?
technova
5+ Years
5+ Years
 
Posts: 107
Joined: Thu May 11, 2006 12:19 pm
Location: Strawbridge, Wi

Postby Bill Hudson » Fri Oct 06, 2006 7:02 pm

From a retired county agent:

You might want to consider this:

"WHITE PINE SAWFLY STILL ACTIVE. Joe Boggs received a sample of white pine sawfly larvae (Neodiprion pinetum) from an arborist from SE Indiana, just across the river from Cincinnati, Ohio. This sawfly is a pale yellow to white colored larva with a black head and four rows of black spots along its body. It feeds primarily on white pine but will attack red, Mugo, and other short-needled pines. Larvae are present between mid-June and late-July, and sometimes for a second generation between mid-August and late-September. The larvae feed on both old and new foliage, so their feeding may result in complete defoliation of branches. Depending on how severe the defoliation is, the tree might be able to grow new needles next spring or it might die before the next growing season. If the stripped branches do produce needles, the trees might look odd because of the lack of old needles behind the new needles.

Sawfly larvae can be managed with insecticides such as Orthene or Sevin. Treatment should have been made when larvae were small and first began feeding on needles. Older larvae are susceptible to these sprays, but the damage to the host plants is already done. This is a pest to watch for next season, beginning in July."

Good luck.

Bill
"The probability of life originating from accident is comparable to the probability of the unabridged dictionary resulting from an explosion in a printing shop." Edwin Conklin, biologist
Bill Hudson
Team Cub
Team Cub
 
Posts: 6398
Joined: Wed Jul 26, 2006 10:50 am
Location: OH, Madison
Zip Code: 44057
Tractors Owned: :
57 F-Cub
64 Lo-Boy
68 Lo-Boy
52 F-Cub
Circle of Safety Award
Circle of Safety: Y

Postby technova » Fri Oct 20, 2006 2:19 pm

Thanks for the info, that sounds exactly like what I have had.
I usually see them real late July but more toward early Aug.
I will be prepared next year.
technova
5+ Years
5+ Years
 
Posts: 107
Joined: Thu May 11, 2006 12:19 pm
Location: Strawbridge, Wi


Return to Farm Life and Better Half Forum

Who is online

Users browsing this forum: No registered users and 2 guests