Broad Mite

Polyphagotarsonemus latus


microscopic broad mite Electron microscope image of a broad mite.

broad mite egg
Broad mite egg.

Broad mite feeding damage Broad mite feeding damage on hemp.

broad mite on hempBroad mite on hemp.

close-up of broad mite
Close-up of broad mite.


  • Hemp
  • Many fruits, vegetables, and ornamentals


Broad mites are extremely small mites, only capable of being seen with a 10x hand lens or greater. Adults are oval and round in shape and light yellow to green in coloration. Females can be differentiated from males due to a stripe that crosses the back of the body which males do not have. Males are also smaller and faster than females. 

Life Cycle

Egg | Larva | Nymph | Adult

  • Many generations per season.
  • Females lay eggs on the undersides of foliage.
  • Unlikely to be capable of overwintering outdoors in Utah but can overwinter indoors on host plants.

Damaging Lifestage(s): Larva, Nymph, Adult

Damage Symptoms

Broad mite feeding can cause malformation of leaves and flower buds that take on a warped and hardened appearance. Feeding can also cause a bronzing effect on leaf color. Plant growth can be stunted and even aborted if feeding happens early enough in the host plant’s life.

Time for Concern

It is unlikely that broad mites are present in Utah because these arthropods prefer high humidity and low temperatures, but they may occur inside greenhouses. Spring is the likely time of concern for this pest.

When and Where to Scout

  • Starting early spring, search for damage symptoms (in greenhouses).
  • Broad mites prefer shaded areas of host plants.
  • Use a 10x hand lens to search leaf surfaces and crevices. 

Threat Level


Occurrence in Utah

Not yet detected in Utah.


  • Apply horticultural oil or insecticidal soap to mites.
  • Maintain beneficial arthropods.

When to Consider Treatment

If symptoms are severe and causing economic damage. 


Other mite species.

Insecticides for Mites

Utah-Registered Product Active Ingredient(s) Notes
Bonide Insecticidal Soap MultiPurpose Insect Control Ready To Use potassium laurate Greenhouse use only.
Brandt Ecotec Plus rosemary oil Greenhouse use only.
Captiva capsicum oleoresin extract  
Captiva Prime capsicum oleoresin extract  
Dr. Earth Final Stop OMRI Fruit Tree Insect Killer (RTU); Concentrate rosemary oil Outdoor use only.
Dr. Earth Final Stop OMRI Rose and Flower Insect Killer (RTU) rosemary oil Ground application only to non blooming plants.
Dr. Earth Final Stop OMRI Vegetable Garden Insect Killer (RTU); Conc. rosemary oil Before flowering only.
Dr. Earth Final Stop OMRI Yard and Garden Insect Killer (RTU); Conc. rosemary oil  
Dr. Earth Final Stop ProActive Yard & Garden Insect Killer (spray) rosemary oil  
EcoWorks EC neem oil, cold pressed  
Garden Safe Brand Insecticidal Soap Insect Killer potassium laurate  
Kopa Insecticidal Soap potassiums salts of fatty acid  
Leaf Life Gavicide Green 415 mineral oil Greenhouse use only.
Mammoth Cancontrol thyme oil  
Mite-E-Oil mineral oil Greenhouse use only.
M-Pede Insecticide Miticide Fungicide potassium laurate  
Natural Guard Brand by Ferti-lome Insecticidal Soap Concentrate potassium salts of fatty acids  
Omni Supreme Spray mineral oil  
Organocide 3-in-1 Garden Spray Concentrate, Ready to Spray; Ready to Use sesame oil  
Organocide Bee Safe 3-in-1 Garden Spray Concentrate; RTU  sesame oil  
Ortho Tree & Shrub Fruit Tree Spray Concentrate clarified hydrophobic extract of neem oil  
Prizefighter ammonium nonanoate Many uses including greenhouse.
PureCrop1 soybean oil  
Rango neem oil, cold pressed  Before flowering only.
Safer Brand #567 Pyrethrin & Insecticidal Soap Concentrate II potassium salts of fatty acids Before flowering only.
Safer Brand Insect Killing Soap Concentrate II potassium salts of fatty acids  
Safer Brand Insect Killing Soap with Seaweed Extract II potassium salts of fatty acids  
SaferGro Pest Out cottonseed oil  
SuffOil-X mineral oil  
Triact 70 clarified hydrophobic extract of neem oil Older versions cannot be used on cannabis.
TriTek mineral oil  
Venerate CG; XC Burkholderia sp. strain A396  

Photo Credits

  • Electron microscope image - USDA, BIRC, Wikipedia
  • Egg - Nancy Gregory, University of Delaware, Bugwood
  • Feeding damage - Gerald Holmes, California Polytechnic State University at San Luis Obispo,
  • Broad mite - Bruce Watt, University of Maine,
  • Close-up - David B. Langston, University of Georgia,

Precautionary Statement: Utah State University and its employees are not responsible for the use, misuse, or damage caused by application or misapplication of products or information mentioned in this document. All pesticides are labeled with ingredients, instructions, and risks, and not all are registered for edible crops. “Restricted use” pesticides may only be applied by a licensed applicator. The pesticide applicator is legally responsible for proper use. USU makes no endorsement of the products listed in this publication.