Hemp Pests

Much of this content is a result of a two-year arthropod and plant disease survey of field-grown hemp operations in northern Utah. Some pests included in this guide were not found in that survey, but may be likely to occur in the future. Reference the full Pests of Hemp in Utah Guide.

Insects

ArmywormsArmyworms
Beet WebwormBeet Webworm‎
Broad MiteBroad Mite
Canabis AphidCannabis Aphid
Corn EarwormCorn Earworm
Cotton Square BorerCotton Square Borer
Eurasian Hemp BorerEurasian Hemp Borer
European Corn BorerEuropean Corn Borer
False Chinch BugFalse Chinch Bug
Flea BeetleFlea Beetle
GrasshopperGrasshoppers
Hemp Russet MiteHemp Russet Mite
Lygus BugLygus Bug
Painted LadyPainted Lady
Pavement AphidPavement Ant‎
Potato Leafhopper HempPotato Leafhopper
Rice Root AphidRice Root Aphid
Spider MitesSpider Mites
Spotted Cucumber BeetleSpotted Cucumber Beetle
Saltmarsh CaterpillarSaltmarsh Caterpillar‎
Scentless Seed BugScentless Seed Bug
Stink BugsStink Bugs
Thrips on HempThrips
Variegated CutwormVariegated Cutworm
WhiteflyWhiteflies
Yellow WoollybearYellow Woollybear
Zebra CaterpillarZebra Caterpillar

 

Diseases

Alfalfa Mosaic VirusAlfalfa Mosaic Virus
Arabis Mosaic VirusArabis Mosaic Virus
Bud RotBud Rot‎
Beet Curly Top Virus HempCurly Top Virus
Fusarium Crown RotFusarium Crown Rot
Fusarium WiltFusarium Wilt
Leaf SpotLeaf Spot
Hemp Powdery MildewPowdery Mildew
Pythium Root/Crown RotPythium Root/Crown Rot
Stem CankerStem Cankers‎
Verticillium WiltVerticillium Wilt

Abiotic Disorders

Herbicide damage on hempHerbicide Damage‎
Nutrient DeficienciesNutrient Deficiencies
Other Abiotic IssuesOther Abiotic Issues
Image Credits

Pavement Ant- Joseph Berger, Bugwood.org
Cannabis Aphid- koppert.com
Rice Root Aphid- Sunil Joshi & Poorani, J. Aphids of Karnataka
Spotted Cucumber Beetle - Govinda Shrestha
Beet Webworm- Frank Peairs, Colorado State University, Bugwood.org
Corn Earworm- Kadie Britt
Cotton Square Borer, Eurasian Hemp Borer, European Corn Borer, Painted Lady, Saltmarsh Caterpillar, Variegated Cutworm, Yellow Wollybear, Zebra Caterpillar, Potato Leafhopper, Hemp Russet Mite, Spider Mites, Beet Curly Top Virus, Stink Bugs, Thrips- Whitney Cranshaw, Colorado State University, Bugwood.org
Broad Mite- Lorena Lopez 
Scentless Seed Bug- Jim Moore, bugguide.net
Bud Rot- questclimate.com



Fusarium Wilt- Ed Rosenthal
Fusarium Crown Rot- Clint Walker
Leaf Spot- North Carolina State University
Powdery Mildew- N. Gauthier
Pythium Root/Crown Rot- National Plant Diagnostic Network
Stem Cankers- Alberti, I., Prodi, A., Nipoti, P
Verticillium Wilt- grasscity.com
Alfalfa Mosaic Virus- ripperseeds.com
Arabis Mosaic Virus- https://durangoherald.com/articles/293876#
Curly Top Virus- USU Extension IPM Program
Herbicide Damage- USU Extension IPM Program
Nutrient Deficiencies- USU Extension IPM Program
Other Abiotic Disorders- USU Extension IPM Program