Plant Pests are:

1
Plant Pests are

• Plants which grow where they are not wanted
  (weeds).
• Insects and their relatives without backbones
  (invertebrates).
• Animals with backbones (vertebrates).
• Fungi and molds which cause diseases (disease
  agents).

2
Weeds

• Weeds are plants that grow where theyare not
  wanted.
• A common California weed is the Shepherds Purse
• (Capsella bursa-pastoris).

3
Invertebrate Pests

• Insects have three body parts head, thorax, and
  abdomen.
• Nematodes are non-segmented cylindrical worms.
• Snails and slugs are mollusks.

Bean leaf beetle
Nematode
4
Vertebrate Pests

• Domestic animals dogs, cats, and horses.
• Wild animals skunk, raccoon, deer, ground
  squirrels, gophers, moles, rabbits.

5
Disease Agents

• These organisms are usually difficult to identify
  because they are microscopic.
• They are molds and fungi, bacteria, and
  viruses.
• Tilletia caries

Tilletia caries