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Pest Watch

April 6, 2005
One of the earliest signs of spring is the blooming of saucer magnolia, Magnolia x soulangiana, an important phenology plant, as utilized in Don Ortonís book Coincide. This excellent book is available from L of L C, 468 S. President, Suite 103 Carol Stream, IL 60188-2894, (630)668-8597; $23 plus $3 shipping.

Following are insects and mites that should be susceptible to control at the following phenological stages of M. x soulangiana.

Pink bud
Hemlock eriophyid mite
Spruce eriophyid mite
European pine shoot moth
Pine bark adelgid
Cooley spruce gall adelgid
Eastern spruce gall adelgid
Spruce needle miner

Blooming
Ash plant bug
Fall cankerworm
Spring cankerworm
Fletcher scale
Juniper webworm

Pink bud to early bloom
Eastern tent caterpillar
Leaf crumpler
Spruce spider mite
Zimmerman pine moth

Dropping petals
European pine sawfly
Gypsy moth
Hawthorn mealybug
Honey locust pod gall
Spruce budworm
Willow aphid

Realize that phenology is an excellent way to avoid calendar date problems with warm and cool springs but is not meant to be a method to time blanket pesticide applications. Before any pesticide or other control efforts are made, scout to make sure that the pest is present in a susceptible stage and that sufficient numbers are present to justify control.