Pest Problem Diagnosis Guide Flashcards
Sign(s) or Symptom(s) of Infestation
Honeydew and or sooty mold
Possible causes:
Aphids, whiteflies, soft scales, mealybugs
Sign(s) or Symptom(s) of Infestation
Leaves mottled or discolored
Aphids, whiteflies, mealybugs, scales, mites
Sign(s) or Symptom(s) of Infestation
Leaves yellow, curled or distorted
Aphids, whiteflies, mealybugs, scales, mites
Sign(s) or Symptom(s) of Infestation
Leaves with yellow specks (later bronzed and dry). Webbing.
Spider mites
Sign(s) or Symptom(s) of Infestation
Leaves turn gray or brown
Southern red mites
Sign(s) or Symptom(s) of Infestation
Leaves and stems with light spots
soft scales
Sign(s) or Symptom(s) of Infestation
Leaves yellowing, with a blanched or stippled look. Leaf underside rusty colored. Frass.
lace bugs
Sign(s) or Symptom(s) of Infestation
White, waxy filaments
foliar mealybugs
Sign(s) or Symptom(s) of Infestation
Silver lines and/or dark spots
thrips
Sign(s) or Symptom(s) of Infestation
Tiny brown objects on leaves or in branch or stem angles. Leaf drop or dieback. Leaves or growing points distorted.
scales or mealybugs
Sign(s) or Symptom(s) of Infestation
Evergreen defoliation; small camouflaged bags covered with needles on branches.
bagworms
Sign(s) or Symptom(s) of Infestation
Defoliation
weevils
Sign(s) or Symptom(s) of Infestation
Pinholes in bark. Fine dust near pinholes. Small wet areas on bark
borers
Sign(s) or Symptom(s) of Infestation
Pines with distorted, bushy growth
pine tip moth
Sign(s) or Symptom(s) of Infestation
Leaf spots, blotches, blisters or scabs
disease (fungal or bacterial)
Sign(s) or Symptom(s) of Infestation
Foliage yellow green
insect infestation or root rot
Sign(s) or Symptom(s) of Infestation
Leaves yellow and drop
root rot
Sign(s) or Symptom(s) of Infestation
Roots brown and salt
root rot
Sign(s) or Symptom(s) of Infestation
Seeds do not germinate. Young plants wilt and die.
damping off
Sign(s) or Symptom(s) of Infestation
Rusty colored orange areas on leaves. Gray or brown lesions may also occur.
rust
Sign(s) or Symptom(s) of Infestation
Juniper leaf and twig browning and dieback
juniper twig blight
Sign(s) or Symptom(s) of Infestation
Tumors, distorted growth
crown gall
Sign(s) or Symptom(s) of Infestation
Twigs or branches brown, looking as though singed by a flame
fire blight
Sign(s) or Symptom(s) of Infestation
Stunting and poor growth
lesion or spiral nematodes; fungus gnats, scales, soil mealybugs
Sign(s) or Symptom(s) of Infestation
Root nodules
root-knot nematode
Sign(s) or Symptom(s) of Infestation
Brown lesions on older leaves; leaf death
foliar (spring crimp) nematode
Sign(s) or Symptom(s) of Infestation
Holes in leaves, or feeding damage along leaf margins. Silvery streaks on foliage.
snails or slugs
