Affecting Annuals

Aphids
Aphid
Description:
Pear-shaped, soft bodied insects; can we winged or wingless. Most commonly green but can be black, dark brown, yellow, white, bronze, red or pink.

 

Damage:
Suck sap while feeding on leaves, stems or roots. Can be found on growing tips, undersides of leaves, along stems and in roots.

 

Signs
Reduction in plant vigour; wilting and distortion of plant tissue - curled, puckered or distorted growth. Excrete honeydew, a sticky fluid that can lead to sooty mold development and also attracts ants, wasps and other flies. In some cases can cause red blistering on leaves.

 

What it attacks
All herbaceous and woody ornamentals

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Flea Beetle
Russ Ottens, University of Georgia, Bugwood.org
Description:
Very small, shiny black beetle with jumping hind legs.

 

Damage:
Young larvae feed on leaves causing skeletonizing; adults chew holes in the leaves.

 

Signs
Unsightly, nuisance.

 

What it attacks
Herbaceous ornamentals

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Leafhoppers
Leafhoppers
Description:
Small, slender pale green, yellow or white insects that jump and hop.

 

Damage:
Suck sap while feeding on leaves; disrupt sap flow of plants.

 

Signs
Bleaching and mottling of leaves; leaves may turn brown and curl up at the edges, plants become stunted with a decline in vigour.

 

What it attacks:
Virginia Creepers, Engelman Ivy, roses, woody ornamentals, perennials, and annuals.

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Slugs
Slugs
Description:
Slimy black-brown speckled mollusks chew large irregular holes in leaves and gouging holes in ripe and unripe fruit.

 

Damage:
Irregular holes with smooth edges are chewed in leaves.

 

Signs
Slimy and/or shiny trails left behind by slugs.

 

What it attacks:
Ornamentals and fruit

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Spider mites
Spider mites
Description:
Tiny rounded eight-legged insect.

 

Damage:
Puncture leaf and suck out both water and food producing green chlorophyll.

 

Signs
Leaves become speckled with yellow blotches; stippling and dotting on leaves; leaves may fall prematurely; fine webbing on leaves, in leaf crotches or on flower buds; reduces vigour.

 

What it attacks:
All ornamentals

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Spittlebug
Spittlebug
Description:
Nymphs are pale green insects found in spittle mass, adults are small tan-brown insects that resemble leafhoppers.

 

Damage:
Suck sap from leaves, shoots and stems. Spittlebugs produce a spittle mass which is the combination of leaf juices, air and mucus; the spittle mass is to protect the insect from predators and from drying out.

 

Signs
Will see a spittle mass on stems on plants. Looks like someone spit on the plant. Nuisance, can be sprayed off with water.

 

What it attacks:
All ornamentals

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Thrips
Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, Bugwood.org
Description:
Tiny, slender pale yellow, green or brown insects.

 

Damage:
Pierce plant cells and suck out the contents.

 

Signs
Injured tissue dies producing dead spots, distorted blooms and leaves, and balled flowers.

 

What it attacks:
Most ornamentals

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