University of Florida

Insect Leaf Damage Decision Key

leaf damageSelect the best description of the leaf damage.

  1. Holes in leaves . . . go to Key A
  2. Mines in leaves . . . go to Key B
  3. Leaves silvered or bronzed . . . go to Tomato russet mite
  4. Black "sooty mold" on leaves . . . go to Aphids / Whiteflies
  5. Silverish, irregular spots on leaves . . . go to Garden fleahopper

Key A

Continue selecting the best description of the leaf damage.

  1. Leaves "windowpaned" i.e. lower surface scraped off leaving only upper surface . . . go to Armyworms; beet, southern and yellowstriped
  2. Tiny "shot" holes . . . go to Flea beetles
  3. Small, ragged holes of more or less uniform size over entire leaf surface . . . go to Cucumber beetle, banded and Cucumber beetle, striped
  4. Large, irregular holes . . . go to Armyworms; beet, southern and yellowstriped

Key B

Continue selecting the best description of the leaf damage.

  1. Long, winding "serpentine" mines narrow on one end and gradually widening, frass deposited in trails along mines . . . go to Leafminers
  2. Broad, irregular "blotch" mines, frass deposited at one end of mine . . . go to Tomato pinworm