Symptoms of Insect Attack

Chewed foliage or blossoms

•  Larvae of moths and butterflies
• Sawfly larvae 
• Beetle larvae or adults 
• Tree crickets, grasshoppers, and walkingsticks 
• Snails and slugs 
  

Bleached, bronzed, silvered, stippled, streaked or mined foliage

• Leafhoppers
  
• Aphids
• Lace bugs
  
• Psyllids 
• Plant bugs
  
• Spider mites 
• Thrips
  
• Leafminers  
  

Distortion (swelling, twisting, or cupping of plant parts)

• Thrips
• Aphids 
• Eriophyid mites 
• Gall makers 
• Psyllids
  

Dieback of twigs, shoots, or entire plant; stems, branches, and exposed roots sometimes with holes in bark

• Wood borers
• Bark beetles 
• Scale insects 
• Gall makers 
• Root-feeding beetle larvae