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As well as the parasitoid, Alphelinus mali, these aphids are preyed on by the bug Anthocoris nemoralis, ladybirds, hoverfly larvae and lacewings. The presence of earwigs Forficula auricularia on the trees can reduce the levels of aphid infestation, so encouraging these insects by providing shelters may be another means of biological control. [1]
The beech blight aphid (Grylloprociphilus imbricator) is a small insect in the order Hemiptera that feed primarily on the sap of American beech trees. The aphids form dense colonies on small branches and the undersides of leaves.
The gall adelgid (Adelges cooleyi) is an adelgid species that produces galls in spruce trees. They infect the new buds of native spruce trees in the foothills of the Rocky Mountains in the spring. They also attack blue spruce to a lesser degree. The insects complete two generations within the year.
For small backyard infestations, spraying plants thoroughly with a strong water jet every few days may be sufficient protection. An insecticidal soap solution can be an effective household remedy to control aphids, but it only kills aphids on contact and has no residual effect. Soap spray may damage plants, especially at higher concentrations ...
Examples of suitable insecticide treatment for A. spiraecola are ethion, parathion-ethyl, dimethoate, fenitrothion, and dimefox via stem bandages. [18] [19] The favored insecticide is imidacloprid for orchard control, as shown in an experiment comparing efficacy of a plant growth regulator on apple/pear trees in Florida. [21]
Related to aphids, scales, and mealybugs, whiteflies can cause significant harm in greenhouses. But they also can wreak plenty of damage on garden and houseplants. But they also can wreak plenty ...
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