spruce twig aphid

Aphid (Mindarus obliquus.) on spruce

These small woolly aphids, also called spruce woolly aphid or the primitive woolly aphid, can be found on the terminals of Picea glauca 'Conica'They cause damage similar to Balsam twig aphid with twisted new growth. Severe infestations cause deformation of the terminals.

They overwinter in the egg stage. In 2006, the aphid egg hatch, or eclosure, occurred in Oregon in early April. In 2011, the aphids were spotted in May.

This aphid produces a waxy covering and can be difficult to control. Early management in the spring is recommended. Use of a selective aphidicide will help preserve many of the natural enemies that attract to feed on these aphids. Those natural enemies include ladybeetles, hoverfly larvae, lacewings, and parasitic wasps such as Pseudopraon sp.

Web resources:

Day, Eric. 2009.BALSAM TWIG APHID Homoptera: Aphididae, Mindarus abietinus. This website has information on a similar aphid which might be helpful with management of this lesser known aphid.

 

Orginal publication: 5/8/2006
Latest update: 5/3/2016

 

Author: R.L. Rosetta, Extension Nursery Integrated Pest Management, Department of Horticulture, Oregon State University

Aphid (Midarus obliquus) damage on dwarf Alberta spruce

Aphid (Midarus obliquus) damage on dwarf Alberta spruce

Aphid (Midarus obliquus) damage on dwarf Alberta spruce

Aphid (Midarus obliquus) damage on dwarf Alberta spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce

Aphid (Midarus sp.) on spruce