Transcript POWER_AND_TECH_files/Unit 3

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