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Sat-Sun 9am-6pm
May 21 9am-6pm

Pests on Perennials

Select the pest from the images below for more information:

AntsAphidsColumbine LeafminersColumbine Sawflys






Daylily MidgesDelphinium WormsFlea BettlesLeafhoppers






Scarlet Lily BeetlesSlugsSpider MitesSpittle Bugs






Stink BugsThrips







AntsAntsAnts are mostly beneficial, feeding on other insects and decomposing plant material. They do not feed directly on plants, but rather on plant debris, rotting wood. However, in great numbers, ants can disrupt turf with large hills.

Symptoms:  Will see ants scurrying along, may see hills in lawn if population is high.

Cultural Control:
• Try to locate the hill; if there’s not a clear sign of a hill, try to watch ant activity. You will see them coming and going from a general direction. Poke holes deep into turf in that area, and drench with an extensive amount of water.
• Powder areas of activity heavily with diatomaceous earth.

Chemical Control:
• Drench hills/tunnel areas with Malathion.
• Poke holes and inject with Doktor Doom Residual or Doktor Doom.


Plants affected:  Numerous indoor and outdoor plants

Symptoms:  Severe infestations will cause curling/twisting of foliage, flowers to wilt and drop.

Life Cycle:  Eggs hatch on host plants in spring, these nymphs give birth to ‘daughters’, within days the daughters give birth - up to 30 generations per summer

Cultural Control:
• Ladybird beetles/larvae, lacewings are natural predators
• Strong jet of water to knock aphids off plants

Chemical Control:
Doktor Doom House and Garden, End All, Ambush

Columbine Leafminers


Columbine Sawfly

Daylily Midge


Delphinium Worms



Flea Beetles

Flea BeetlesFlea BeetlesPlants affected:  Numerous perennials and annuals

Symptoms:  Numerous holes in foliage, about the size of a pinhead

Life Cycle:  Overwinter in soil beneath leaf debris, emerge in spring. Adults feed on foliage, mate and lay eggs

Cultural Control:  Clean up leaf debris and weeds in autumn

Chemical Control:  Spray adult beetles in spring before they lay eggs; Ambush, Dr. Doom House and Garden



Scarlet Lily Beetles



SlugsSlug TrailPlants affected:  Perennials, annuals

Symptoms:  Ragged holes chewed in leaves, slime trails on leaves

Life Cycle:
Overwinter as eggs in soil
• Hermaphrodite; every slug can lay eggs. Eggs laid in batches of 10-50 in moist soil.

Cultural Control:
Till soil to disturb eggs, expose eggs to natural predators
Spread diatomaceous earth or other gritty substances under plant leaves
Spread iron based slug pellets (Sluggo or Safer’s) at base of plants, under foliage
Beer traps; dishes filled with beer, set at soil level, may attract and drown slugs

 Chemical Control:  Metaldehyde based pellets

Spider Mites

Spider MitesSpider MitesPlants affected:  Numerous indoor and outdoor plants.

Stippling—tiny dots in foliage.
Yellowing of foliage—’haze’ on foliage.

Life Cycle:
Can overwinter in various stages under debris or bark on host plants, in greenhouses.
Become active in spring as foliage emerges.

Cultural Control:
• Lacewings are natural predators
• Keep plants misted (they prefer dry conditions)
• Fall debris cleanup.

Chemical Control:  End All, Doktor Doom House and Garden, Ambush.

Spittle Bugs

Spittle BugsSpittle BugsPlants affected:  Numerous annuals and perennials

Symptoms:  Spit’ on plant—bug is hidden underneath the foam

Life Cycle:
Eggs overwinter on plant material, hatch in spring, nymphs feed on plants
Adults lay eggs in late summer

Cultural Control:  Spray plants with strong jet of water

Chemical Control:  Not necessary