Crabgrass. Photo by: Gordon Johnson, Extension Agent, Agriculture and Commercial Horticulture, University of Delaware, Kent County.

Dunce cap stage of bagworms. Bag is held upright by early instar bagworms and is called the ‘dunce cap’ stage. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Calico scales. Photo by: Raymond Gill, California Department of Food and Agriculture, Bugwood.org.