361.T1 Model Agricultural Core Curriculum: Supplement University of California, Davis Introduction to Plant Pests 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).

361.T2 Model Agricultural Core Curriculum: Supplement University of California, Davis Introduction to Plant Pests Weeds Weeds are plants that grow where theyare not wanted. A common California weed is the Shepherd’s Purse (Capsella bursa-pastoris).

361.T3 Model Agricultural Core Curriculum: Supplement University of California, Davis Introduction to Plant Pests 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

361.T4 Model Agricultural Core Curriculum: Supplement University of California, Davis Introduction to Plant Pests Vertebrate Pests Domestic animals: dogs, cats, and horses. Wild animals: skunk, raccoon, deer, ground squirrels, gophers, moles, rabbits.

361.T5 Model Agricultural Core Curriculum: Supplement University of California, Davis Introduction to Plant Pests Disease Agents These organisms are usually difficult to identify because they are microscopic. They are molds and fungi, bacteria, and viruses. Tilletia caries