Echinothrips

Greenhouse environments and agricultural crop systems; leaf-dwelling rather than flower-dwelling. Echinothrips americanus has been reared in laboratory conditions at 23±1°C, 60±10% RH, with 16:8 L:D photoperiod on host plants including Phaseolus vulgaris and Gossypium sp.

Native to eastern North America; Echinothrips americanus has spread to Canada, Europe, Asia, and Northern Australia within the last 30 years via human-mediated global trading. Documented in Europe (Austria, Belgium, Croatia, Czech Republic, Denmark, France, Germany, Hungary, Ireland, Italy, Netherlands, Norway, Poland, Russia, Serbia, Slovakia, Slovenia, Sweden, UK), Asia (China, Thailand), North America (Canada: British Columbia, Ontario; USA: District of Columbia, Florida, Georgia, Hawaii, Illinois, Iowa, Maryland, Missouri, New York, Tennessee, Virginia), and Central America and Caribbean (Puerto Rico). Records from Uzbekistan (2014) and Denmark, Norway, Sweden per GBIF.

Phytophagous; feeds on leaves, flowers, and fruits by piercing and sucking plant cells. Echinothrips americanus is polyphagous, reported from 48 plant families worldwide with preferred hosts in Araceae and Balsaminaceae.

• Phaseolus vulgaris - laboratory hostLaboratory rearing
• Gossypium sp. - laboratory hostLaboratory rearing
• Euphorbia pulcherrima - hostFirst reported 1984 in Georgia; common name 'poinsettia thrips' derives from this association
• Impatiens spp. - preferred hostBalsaminaceae; suggested common name 'impatiens thrips'
• Gerbera - hostGreenhouse crop
• Rosa - hostGreenhouse crop
• Capsicum annuum - hostSweet pepper, greenhouse crop
• Cucumis sativus - hostCucumber, greenhouse crop
• Solanum melongena - hostEggplant, greenhouse crop

Haplo-diploid reproductive mode with arrhenotoky: haploid males develop from unfertilized eggs, diploid females from fertilized eggs. Males exhibit prospermatogeny (spermiogenesis completed at adult eclosion). Mean lifespan 10-14 days under laboratory conditions. Females can mature eggs throughout almost their entire adult life.

Males produce pheromones including dimethyl glutarate (DBE-5) and dimethyl adipate (DBE-6) that influence mating behavior. DBE-5 induces abdomen wagging and raising in both sexes; DBE-6 is present on mated females and causes males to avoid them. Mating involves three phases (precopulation, copulation, postcopulation) with antennal contact, mounting, aedeagus insertion, and a calm period with no body movement. Copulation duration averages 6-10 minutes, with younger males copulating significantly shorter than older males (~403s vs ~611s). Males can inseminate up to 10 females with equal sperm quantities. Males clasp female pterothorax with legs and twist abdomen underneath female's; antennal palpation and mesothoracic leg stroking of female's back occur during copulation. Females can remate but show reduced receptivity after initial copulation. Males repeatedly attempt to mate even with unreceptive females and exhibit strong competition for virgin females.

Agricultural and greenhouse pest causing crop damage through feeding. Leaf-dwelling habit distinguishes it from flower-dwelling thrips species. Potential virus transmission vector (genomoviruses have been recovered from E. americanus). Subject to biological control efforts using predatory thrips (Franklinothrips vespiformis) and ants (Tapinoma melanocephalum).

Significant economic pest in greenhouse and agricultural systems. Echinothrips americanus has become an important invasive pest in vegetable and ornamental crops across multiple continents. Control methods include chemical treatments and biological control agents. Alternative pest management strategies using male-produced pheromones have been proposed.

• ThripsSame family Thripidae; Echinothrips distinguished by specific antennal structure, body shape, and wing characteristics, though detailed distinguishing features require expert examination
• Frankliniella occidentalisBoth are Thripidae pests; Echinothrips is leaf-dwelling while Frankliniella is primarily flower-dwelling, affecting biological control strategies
• AeolothripsBoth can show banded wing patterns; Aeolothrips are predatory with different ecological roles, and wing banding patterns differ (A. fasciatus has humeral, median, and apical white bands versus Echinothrips patterns)

• thrips
• Thripidae
• greenhouse pest
• polyphagous
• invasive species
• arrhenotoky
• prospermatogeny
• pheromones
• leaf-dwelling
• agricultural pest

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• ID Challenge #6 | Beetles In The Bush
• Echinothrips americanus . [Distribution map].
• Reproductive Behavior of Echinothrips americanus (Thysanoptera: Thripidae)
• Male Pheromones Influence the Mating Behavior of Echinothrips americanus
• The results of a study on Echinothrips americanus Morgan
• Hosts preference ofEchinothrips americanusMorgan for different vegetables
• Genomovirus Genomes Recovered from Echinothrips americanus Sampled in Florida, USA
• Poinsettia Thrips, Impatiens Thrips (suggested common names) Echinothrips americanus Morgan (Insecta: Thysanoptera: Thripidae)
• Comparisons of Developmental and Reproductive Biology Between Parthenogenetic and SexualEchinothrips americanus(Thysanoptera: Thripidae)
• Olfactory and physical manipulation by males on life‐history traits in Echinothrips americanus MORGAN 1913 (Thysanoptera: Thripidae)
• Biological Control of Echinothrips americanus Morgan (Thysanoptera: Thripidae) in Sweet Pepper Using the Predatory Thrips Franklinothrips vespiformis Crawford (Thysanoptera: Aeolothripidae)
• Morphology, distribution, ultrastructure, and possible function of the external sensilla on antennae and mouthparts of Echinothrips americanus Morgan (Thysanoptera: Thripidae)
• Biological control of poinsettia thrips, Echinothrips americanus (Thysanoptera: Thripidae), on lima bean using the ghost ant, Tapinoma melanocephalum (Hymenoptera: Formicidae)