Aphids All Around in Spring 2011
Aphid populations have been higher this spring than many can remember in years. On fruit trees we’ve seen black cherry aphid, green peach aphid, mealy plum aphid, leafcurl plum aphid, and apple aphids. On landscape plants: rose aphid, spirea aphid on a number of species, honeysuckle aphid, sunflower aphid on dogwood, linden aphid, elm leaf aphid, Norway maple aphid, giant conifer aphid, and many more. Not only were they abundant, but on a few host plants, egg hatch occurred very early; even before bud break. A variety of factors combined to make the “perfect storm” for the aphid eruptions.
The good news is that many of these aphid species migrate to alternate hosts for the summer, and will be leaving the plants they are now on very soon.
Also, the abundance of prey leads to a subsequent abundance of predators, some of which were active very early this spring, including wasp parasites and larvae of syrphid flies and lady beetles.