Citrus Tree Symptom Checker

Symptom Checker IconOur Citrus Tree Symptom Checker is developed as a tool to help understand what citrus tree symptoms could mean. We at GrowScripts feel that the best way to identify what is wrong with your citrus tree is by way of visual examination. Within this section we are bringing together resources we have used for years to help you identify and treat what is wrong with your lemon tree, lime tree, orange tree, grapefruit tree, or tangerine tree.

SymptomsPossible DiagnosisIdentifying ImageSuggested Products
  • Defoliation
  • Fruit drop
  • Blemishes on fruit
  • Blister like lesions on fruit
  • Round holes in leaves
  • Raised corky lesions on fruit
  • Citrus CankerLeaf Image
    Fruit Image
  • Yellowing along the veins of normal sized leaves
  • Blotchy-mottle on leaves
  • Chlorotic (yellow leaves)
  • Out of season flushing and flowering
  • Dieback in severe cases
  • Small lopsided fruit
  • Unpleasant fruit flavor
  • Fruit not coloring properly
  • Citrus GreeningImage Foliar Micronutrients
    NPK Fertilizer
  • Dieback Defoliation
  • Leaves show brown spots surrounded by yellow
  • Blackening of leaf veins
  • Fruit drop
  • Sunken brown/black spots with yellow halo on fruit
  • Alternaria Brown SpotImage Copper
  • Corky outgrowth on leaves, shoots, and fruit
  • Wart like growths
  • Citrus ScabImage Copper
  • Spores on underside of leaves
  • Yellow spots on upper side of leaves
  • Irregular brown blisters that have a greasy appearance
  • Leaf drop
  • Greasy SpotImage Copper
    Foliar Micronutrients
  • Bark peeling at ground level
  • Redish-brown resin from trunk
  • PhytopthoraImage N/A
  • Black thin mat on fruit and/or leaves
  • Sooty MoldImage Valet
  • Little bugs on plant
  • AphidsImage Imidacloprid
    Neem Oil
  • Curling leaves
  • Serpentine mines on the leaves
  • Silvery film over the mines
  • Citrus LeafminerImage Imidacloprid
    Neem Oil
  • Leaf distortion and curling
  • Citrus PsyllidImage Imidacloprid
    Neem Oil
    Thyme Oil
  • Small Fruit
  • Brownish/Rust looking fruit
  • Citrus Rust MiteImage Neem Oil
    Thyme Oil

    The information above is referenced from HS876, one of a series of the Horticultural Sciences Department, UF/IFAS Extension. Original publication date June 2002. Revised August 2013. Visit the EDIS website at