Aphids on Ornamentals
Aphids on Ornamentals
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Aphids are very common insects. They overwinter as eggs which hatch in the spring. During the year, winged forms will migrate to different plants. The insects injure plants by sucking juices and infecting healthy plants with diseases they pick up from unhealthy plants. A sticky excrement called honeydew drips on and coats the leaves and objects below the infestation. A black fungus called sooty mold will grown on the deposited honeydew. There are many types of aphids attacking a large variety of host plants.
Natural controls include ladybugs, particularly the larvae. The larvae do not resemble adult ladybugs. They are black with blue spots and are elongated with pointed abdomen.
Pesticides labeled for use against aphids are diazinon, Orthene, Sevin, malathion, or rotenone. Dormant oil sprays in the spring will control overwintering stages.
Visuals associated with this text.
| Visual title - Visual size | Visual title - Visual size |
|---|---|
| Aphids plus winged adult - 12K | Aphids, ants herding aphids - 24K |
| Aphids on rose - 25K | Aphids on crepe myrtle - 33K |
| Aphids on crabapple - 32K | Pine bark aphid - 31K |
| Sooty mold on liriodendron - 32K | Sooty mold on crepe myrtle - 28K |
| Sooty mold on podocarpus - 49K | Wooly alder aphid - 29K |
