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Insects, Diseases and Greenhouse Safety

Floral Careers Plant Propagation. Insects, Diseases and Greenhouse Safety. Major Insect Pests in the Greenhouse. Aphids Thrips Whiteflies Mealybugs Spider Mites. Aphids. Immature & Adult Greenhouse Thrips. Greenhouse Whiteflies. Mealybug excreting honeydew. Two-spotted Spider Mite.

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Insects, Diseases and Greenhouse Safety

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  1. Floral Careers Plant Propagation Insects, Diseases and Greenhouse Safety

  2. Major Insect Pests in the Greenhouse

  3. Aphids • Thrips • Whiteflies • Mealybugs • Spider Mites

  4. Aphids

  5. Immature & Adult Greenhouse Thrips

  6. Greenhouse Whiteflies

  7. Mealybug excreting honeydew

  8. Two-spotted Spider Mite Red Spider Mite

  9. Insect & Disease Scouting

  10. Also called “monitoring’. • Perform weekly. • Use sticky cards for insects • Yellow: attracts most flying insects • Blue: for thrips • Look for disease symptoms.

  11. Controlling Insects and Diseases

  12. Sanitation • The goal of sanitation is to eliminate all possible sources of the pest. • weed removal. • quarantine infested plants. • medium pasteurization (especially if it contains soil). • algae control-fungus gnats.

  13. Watering • Too much moisture: • leaf diseases • root rots • fungus gnats • algae • Too little moisture: • stresses the plants and predisposes it to disease • hot, dry conditions favor spider mites

  14. Variety Selection • Choose insect/disease resistant varieties.

  15. Greenhouse Safety

  16. Pesticide Labels • Caution: slightly toxic • Warning: moderately toxic (a teaspoonful to one ounce could kill an average size adult). • Danger/Poison: highly toxic (one teaspoonful could kill an average size adult).

  17. Restricted Entry Interval (REI) • Posted on greenhouse door. • The time immediately following pesticide application when entry is restricted. • For example REI 12 hours.

  18. Pesticide Storage • Pesticides must be stored in a separate, ventilated room.

  19. General Safety Concerns • No smoking. • Keep hoses off the floor. • Watch out for wet floors that may be slippery. • Wash your hands after handling plants. • Don’t drink the water!

  20. End

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