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Pesticides • Any substance or mixture of substances designed to prevent, destroy, repel, or limit pests – Weeds – Insects – Diseases – Plant damaging organisms Chemicals Controls in Horticulture • Types of Chemical Controls – Classified by the type of pest they combat – Insecticides: Insects – Herbicides: Weeds – Nematicides: Nematodes – Bactericides: Bacteria – Fungicide: Fungi How Chemical Controls Work Chemical Type Stomach Contact Systemic Fumigants How it works Poison from whatever part of plant the insect eats Comes in contact with insects skin Poison found in the plant’s system, kills insect when it ingests plant Gas poisons that enter insect’s respiratory system Types of Chemical Control Applications May require surfactant to help ensure chemical controls reach desired pests Types of Pesticide Exposure • Oral Exposure: Poison enters through the mouth • Dermal Exposure: Poison touches skin and absorbed into body • Inhalation Exposure: Breathing in particles or fumes Pesticide Labels • Required by the Environmental Protection Agency • Certain information about the product is required: – Name – Producer/Manufacturer – Use – Signal Word – Contents Chemical Storage and Hazard Disposal • Even after using, pesticides can be dangerous • Reduces risk to humans and environment – Well-ventilated – Dry – Away from extreme temperatures – Away from children, animals, and water supplies Chemical Spray Equipment Hazardous Materials Classification
