Wood Acres Tree Specialists MD, DC, VA
call for tree service-1-888-464-3926
10315 Kensington Parkway, Kensington MD 20895-3358
Leaf Notes Blog
Tree & shrub care services
General Tree Work:
Plant Health Care:

Mountain Ash Sawfly

Howard Ensign Evans, Colorado State University, Bugwood.org
Pristiphora geniculata (Hartig) - Larva(e) Mountain Ash Sawflies defoliateAmerican and European mountain ashes mainly.Look for defoliation of all but the midribs of leaves (a). Larvae, which are yellowish-green with prominent black spots (a,b), feed gregariously and tend to defoliate an entire branch before moving on to another.
There are two generations per year, except in the northernmost part of the sawfly's range. Winter is spent in the ground as a cocoon, and pupation occurs in the spring. First generation adults emerge and lay eggs throughout June and into July. Eggs are laid in slits along the toothed margin of leaflets, producing a blistered appearance. Larvae of the first generation mature and drop to the soil to pupate by August. A portion of these reach adulthood and lay eggs, producing a second generation which feeds from late August through September.
Pro-active tree & shrub care
Insect & Tree Pest Index Tree & Shrub Disease Index Tree & Shrub Damage Index Monthly Plant Health Care Report
Tree & Shrub Care info
Affiliations
Maryland Aborist Association   Tree Care Association Accreditation   ISA Certified Master Arborist ISA Certified Arborist
Maryland Arborist
Association
Tree Care Industry
Association
International Society
of Arboriculture
Master Arboist
On Staff
Copyright © 2010-2017 Wood Acres Tree Specialists - All Rights Reserved