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Pest Watch

April 15, 2008

A variety of insect and related pests are susceptible to control early in the season, based on the phenological development of saucer magnolia, Magnolia x soulangiana. This is according to Donald A. Ortonís fine book Coincide, the Orton System of Pest Management.


When saucer magnolia is in the pink-bud stage, hemlock eriophyid mite, spruce eriophyid mite, European pine shoot moth, spruce spidermite, Cooley spruce gall adelgid, eastern spruce gall adelgid, and spruce needle miner are susceptible to control. However, by the time that blooming occurs, Cooley spruce gall adelgid, eastern spruce gall adelgid, and spruce needle miner cease to be susceptible to control.


During the blooming stage, ash plant bug, fall cankerworm, spring cankerworm, Fletcher scale, leaf crumpler, eastern tent caterpillar, juniper webworm, and Zimmerman pine moth become susceptible to control.


At petal fall, European pine sawfly, Gypsy moth, hawthorn mealybug, honeylocust pod gall, and willow aphid become susceptible to control.


Many of these pests continue to be susceptible to control for a period of a couple of weeks or more after this time.
Author: Phil Nixon

 

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