By The Old House Web


List of files and visuals associated with this text.

Aphids are soft-bodied, slow-moving insects that reproduce rapidly. Many aphids prefer to feed on young, succulent growth. Some feed in sheltered locations, such as inside leaves that they have caused to curl or become distorted. Aphids attack trees and shrubs of all kinds but do not usually seriously injure them. New plant growth may become distorted or stunted before predators and parasites decimate the aphid population. The greatest damage may be from the sticky, sugary aphid excrement called honeydew. Honeydew may fall on automobiles or furniture below infested trees. Sometimes a black fungus called sooty mold will grow on the honeydew deposited on foliage below aphid colonies.

Adelgids, psyllids or phylloxeras are closely related insects that resemble aphids. The adelgids and phylloxeras frequently induce infested host plants to form galls in which the insects live.

Aphids are present on most plants, generally at non- injurious levels. The honeydew excreted by aphids may be useful for identifying aphid populations. Natural controls, including natural enemies -- ladybird beetles, lacewings, syrphid flies, parasitic wasps -- usually bring aphid populations under control shortly after they become noticeable. Before applying any insecticide treatments, search the aphid colonies for these natural enemies. High numbers of these beneficial insects usually indicate that aphid problems are being controlled without your intervention.

Visuals associated with this text.

Visual title - Visual size Visual title - Visual size
Aphids - 24K Green peach aphid - 42K
Green peach aphid - 42K Corn leaf aphid - 27K
Aphids plus winged adult - 12K Aphids, ants herding aphids - 24K
Aphids on crepe myrtle - 33K Aphids on crabapple - 32K
Sooty mold on liriodendron - 32K Sooty mold on crepe myrtle - 28K
Sooty mold on podocarpus - 49K Wooly alder aphid - 29K
Go To Top of File               Main Page for this Data Base

Search Improvement Project