Like all garden annuals, horned poppy is at risk
of being attacked by insects and animals.
|Cluster of small, soft-bodied insects on buds and growth tips; sticky secretions may be evident
||Aphids||Spray with rotenone or malathion* in evening.
||Pot Marigold, Nasturtium, Primrose, Sweet Pea|
|Leaves chewed away; hard-shelled beetles on plant and burrowed into flowers
||Beetles of various kinds
||Spray with rotenone or Sevin* **; pick by hand and destroy.
||Gourds, Hollyhock, American/French Marigold, Zinnia|
|Growth tips wilted; small hole in plant stem at point where wilting begins
||Borers||Snap off at level of hole; spray with endosulfan*, pyrethrum, or rotenone.
||Gourds, American/French Marigold, Ornamental Corn, Zinnia|
|Leaves and flowers chewed away; caterpillars on plant
||Caterpillars of various kinds and sizes
||Pick off by hand and destroy; spray with pyrethrum, malathion*, or Bacillus thuringiensis.
||Nicotiana, Ornamental or Flowering Cabbage, Petunia|
|Entire young plants wilted; partially or entirely chewed through at ground level
||Cutworms||Dig in soil around plant base; find rolled up caterpillars and destroy; circle plant with cardboard collar on edge (1 inch below ground and 1 inch above ground).
||China Pink, Nicotiana, Ornamental or Flowering Cabbage, Petunia|
|Leaves peppered with small round holes; small triangular-shaped bugs seen when disturbed
||Spray with malathion* or methoxychlor*; dust with diatomaceous earth.
||Aster, Dahlia, Pot Marigold|
|Leaves "painted" with whitish, curling trails
||Spray with malathion*; remove badly infested leaves.
||China Pink, Hollyhock|
|White or pinkish fuzzy clumps on stems and at base of leaves; sticky to the touch
||Mealybugs||Spray with malathion* or pyrethrum; hand kill by painting each bug with alcohol.
||Asparagus Fern, Moses-in-a-Boat, Transvaal Daisy|
|Slime trails on plants; soft sticky slugs on plants after dark; holes eaten in leaves
||Slugs and Snails
||Set out shallow containers of beer; set out metaldehyde slug bait*; pick by hand.
||Hollyhock, Nicotiana, Petunia, Primrose|
|Leaves yellowing with speckled look; fine spider webs on plant; tiny bugs on backs of leaves
||Spray with a miticide* on backs of leaves; wash or spray with soapy water.
||Flowering Maple, Impatiens, Primrose|
|Small glob of white bubbles on plant stem or leaves; small insect hidden inside
||Spittlebugs||Ignore unless very pervasive; spray with malathion*; wash off repeatedly with hose.
||Bachelor's Button, Four O'Clock|
|Brown or white flecks on plant leaves
||Thrips||Spray with malathion* or dust with sulphur.
|Cloud of tiny white flies fluttering around plant
||Spray with malathion* or diazinon*; use yellow sticky traps.
||Heliotrope, Lantana, Morning Glory Vine|
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Protecting your plants from diseases is of course just as important as keeping them free of insects and animals. Go to the next page to read more about plant diseases.
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