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Colorado State University

Colorado State University is one of our nation's leading research universities with world-class research in infectious disease, atmospheric science, clean energy technologies, and environmental science. It was founded in 1870 as the Colorado Agricultural College, six years before the Colorado Territory became a state.

Colorado State University, located in Fort Collins, Colorado, is situated on nearly 5,000 acres of land, including the main campus, a foothills campus, an agricultural campus, and a mountain campus (Pingree Park). Colorado State also has 4,600 acres for research centers, Cooperative Extension offices, and Colorado State Forest Service stations.
Remove Filters: Gallmaker Insects(X) United States(X) Landscape(X)
125 Images of 24 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
5490345 boxelder gall midge Contarinia negundinis
5490346 boxelder gall midge Contarinia negundinis
5490351 poplar twiggall fly Hexomyza schineri Larva exposed in gall
5490384 boxelder gall midge Contarinia negundinis Larvae exposed in gall. A parasitoid egg is in the upper left.
5083023 oak rough bulletgall wasp Disholcaspis quercusmamma a few of the galls in the center show emergence holes. Galls are at the time of adult emergence (November 3, 2006).
5445209 cooley spruce gall adelgid Adelges cooleyi Galls on terminals of Engelmann spruce
5445208 cooley spruce gall adelgid Adelges cooleyi Adults swollen with eggs on underside of spruce terminals
5445374 poplar vagabond aphid Mordvilkoja vagabunda Large pseudo-gall produced on aspen terminal
5445207 cooley spruce gall adelgid Adelges cooleyi Late stage nymphs within spruce gall
5445206 cooley spruce gall adelgid Adelges cooleyi early stage nymphs within spruce galls
5445204 cooley spruce gall adelgid Adelges cooleyi
5445205 cooley spruce gall adelgid Adelges cooleyi with eggs
5445203 cooley spruce gall adelgid Adelges cooleyi
5443283 poplar twiggall fly Hexomyza schineri Developing gall. Photograph taken June 20, 2010.
5443281 poplar twiggall fly Hexomyza schineri
5443282 poplar twiggall fly Hexomyza schineri
5443264 honeylocust pod gall midge Dasineura gleditchiae Pod galls
5443263 honeylocust pod gall midge Dasineura gleditchiae
5443260 honeylocust pod gall midge Dasineura gleditchiae Ovipositing
5443261 honeylocust pod gall midge Dasineura gleditchiae Pod galls on honeylocust
5443262 honeylocust pod gall midge Dasineura gleditchiae Pod galls
5443235 cooley spruce gall adelgid Adelges cooleyi Galls in initial stage of opening prior ro disprsal of the Cooley spruce gall adelgids
5443237 cooley spruce gall adelgid Adelges cooleyi Gall broken open to show developing Cooley spruce gall adelgids
5443238 cooley spruce gall adelgid Adelges cooleyi Cross-section of gall with developing Cooley spruce gall adelgids
5443195 oak rough bulletgall wasp Disholcaspis quercusmamma Adult female on twiggall. Photograph taken on November 5, 2010
5443194 oak rough bulletgall wasp Disholcaspis quercusmamma Adult female on twiggall. Photograph taken November 5, 2011
1325002 pinyon spindlegall midge Pinyonia edulicola
1325030 cooley spruce gall adelgid Adelges cooleyi
1325023 cooley spruce gall adelgid Adelges cooleyi female with egg mass
1325022 cooley spruce gall adelgid Adelges cooleyi winged adults emergin from spruce gall
1325028 cooley spruce gall adelgid Adelges cooleyi overwintered female on twig
1326082 chokecherry midge Contarinia virginianae Typical gall
1326008 oak rough bulletgall wasp Disholcaspis quercusmamma Winged adult form
1476089 sugar beet root aphid Pemphigus populivenae colonies on roots of quinoa
1326009 oak rough bulletgall wasp Disholcaspis quercusmamma Developing galls on twig
1326083 chokecherry midge Contarinia virginianae Typical gall
1326106 poplar twiggall fly Hexomyza schineri Tree showing effect of several years' infestation
1326007 oak rough bulletgall wasp Disholcaspis quercusmamma Adult exposed from gall immediately prior to emergence
1326092 poplar twiggall fly Hexomyza schineri Pupa emerging from gall
1326107 poplar twiggall fly Hexomyza schineri cross section of old gall
1326084 chokecherry midge Contarinia virginianae Larvae exposed from gall
1326102 poplar twiggall fly Hexomyza schineri Adult fly and primary parasitoid, the eurytomid Eurytoma contractura
1326006 oak rough bulletgall wasp Disholcaspis quercusmamma Developing galls on twig
1326091 poplar twiggall fly Hexomyza schineri Larva exposed on gall
1326105 poplar twiggall fly Hexomyza schineri Adult sunning on leaf
1246053 cooley spruce gall adelgid Adelges cooleyi Galls on heavily infested tree
1326004 Cynipid gall wasp Acraspis macrocarpae agamic generation
1326090 poplar twiggall fly Hexomyza schineri Early symptoms of twig galling
1325033 eastern spruce gall adelgid Adelges abietis
1326104 poplar twiggall fly Hexomyza schineri typical twiggalls
1326101 poplar twiggall fly Hexomyza schineri Symptoms shortly after oviposition
1325066 ash flower gall mite Eriophyes fraxiniflora
1326103 poplar twiggall fly Hexomyza schineri typical twiggalls
1326005 oak rough bulletgall wasp Disholcaspis quercusmamma Fully formed galls on twig
1476076 hackberry nipplegall maker Pachypsylla celtidismamma Late instar nymph exposed within gall
1476077 hackberry nipplegall maker Pachypsylla celtidismamma late instar nymph exposed with gall
1476078 hackberry nipplegall maker Pachypsylla celtidismamma newly emerged adult next to gall
1476079 hackberry nipplegall maker Pachypsylla celtidismamma newly emerged adult next to gall
1476088 poplar twig gall aphid Pemphigus populiramulorum gall produced on cottonwood twig
1476091 cooley spruce gall adelgid Adelges cooleyi overwintered female with eggmass
1476092 cooley spruce gall adelgid Adelges cooleyi mature female on douglas fir needles
1476100 oak phylloxerids Phylloxera spp. large colony on aspen
1476109 oak rough bulletgall wasp Disholcaspis quercusmamma gall cut away to show pupal chamber
1476110 oak rough bulletgall wasp Disholcaspis quercusmamma pupal covering
1476111 oak rough bulletgall wasp Disholcaspis quercusmamma pupa removed from pupal chamber
5422256 cooley spruce gall adelgid Adelges cooleyi Late stage nymphs exposed within gall chambers
5422255 cooley spruce gall adelgid Adelges cooleyi late stage nymphs exposed within gall chambers
5422254 cooley spruce gall adelgid Adelges cooleyi Gall with oozing at openings just prior to emrgence of adult forms of the cooley spruce gall adelgid
5393474 boxelder gall midge Contarinia negundinis Larvae in galled leaves
5382067 hackberry nipplegall maker Pachypsylla celtidismamma Psyllid galls that have been decapped by fox squirrels (Sciuris niger), that eat the mature nymphs in late summer.  After feeding, the leaves are cut and drop to the ground.  
5382068 hackberry nipplegall maker Pachypsylla celtidismamma Fallen leaves cut by fox squirrels (Sciuris niger) after they have decapped galls of the hackberry nipplegall maker and eaten the mature nymphs.  
5382066 hackberry nipplegall maker Pachypsylla celtidismamma Psyllid galls that have been decapped by fox squirrels (Sciuris niger), that eat the mature nymphs in late summer.  After feeding, the leaves are cut and drop to the ground.  
5369737 ash bead gall mite Aceria fraxini Leaf galls, lower surface
5369736 ash bead gall mite Aceria fraxini Leaf gulls, upper surface
5369777 hackberry nipplegall maker Pachypsylla celtidismamma Cast skins following emergence of adults from galls in September
5369766 hackberry nipplegall maker Pachypsylla celtidismamma Cast skins following emergence of adults from galls in September
5369749 cooley spruce gall adelgid Adelges cooleyi Dred galls on Colorado blue spruce
5369748 cooley spruce gall adelgid Adelges cooleyi Infestation on Douglas-fir cone
5304053 spider mite predator midge Feltiella acarisuga Larvae feeding on twospotted spider mites
5304052 spider mite predator midge Feltiella acarisuga Larva feeding on twospotted spider mites
5304008 aphid Tetraneura spp.
5304007 aphid Tetraneura spp.
5304006 aphid Tetraneura spp.
1476040 elm cockscombgall aphid Colopha ulmicola Characteristic leaf galls
5209034 poplar twiggall fly Hexomyza schineri Old injury. The original damage was the normal twig gall and the insect has absented the gall for many years.. As the plant grows this swelling injury continues to be incorporated into new wood.
5188003 pine leaf adelgid Pineus pinifoliae Aphids within gall
5188005 pine leaf adelgid Pineus pinifoliae Current season gall
5188004 pine leaf adelgid Pineus pinifoliae Old gall
5188015 cooley spruce gall adelgid Adelges cooleyi Overwintered female. Photograph taken March 26, 2007
1475017 hackberry nipplegall maker Pachypsylla celtidismamma adult recently emerged from gall and adjacent to nymphal skins
5084048 oak rough bulletgall wasp Disholcaspis quercusmamma galls
5084050 hackberry blistergall psyllid Pachypsylla celtidisvesiculum near developing galls of hackberry nipple maker psyllid
5083090 poplar twiggall fly Hexomyza schineri ovipositing in new growth
5083051 poplar twiggall fly Hexomyza schineri Leaf injury produced as adult feeding wounds by ovipositon punctures.
5083018 oak rough bulletgall wasp Disholcaspis quercusmamma shortly after emergence. Picture taken November 3, 2006
5083019 oak rough bulletgall wasp Disholcaspis quercusmamma side view. Picture taken during period of emergence (November 3, 2006)
5083020 oak rough bulletgall wasp Disholcaspis quercusmamma side view. Picture taken during adult emergence (November 3, 2006)
5083021 oak rough bulletgall wasp Disholcaspis quercusmamma Adult palpitating bud during examination prior to oviposition (November 3, 2006)
5082081 oak rough bulletgall wasp Disholcaspis quercusmamma galls very densely clustered on a small twig
5083022 oak rough bulletgall wasp Disholcaspis quercusmamma Galls at time when adults are emerging. The gall in foreground with irregular wound was made by a bird feeding on the gall.
2200077 poplar twiggall fly Hexomyza schineri Adult resting on newly emerged leaf. May 2, 2006
2200079 poplar twiggall fly Hexomyza schineri Oviposition wounding by adults. Small punctures and tattered leaves indicate feeding wounds made by adults
1246009 sugar beet root aphid Pemphigus populivenae Colony on roost of quinoa
1325057 hackberry nipplegall maker Pachypsylla celtidismamma Large swellings produced by nipplegall maker. Smaller swellings by hackberry blistergall psyllid
1325045 hackberry nipplegall maker Pachypsylla celtidismamma
1325041 hackberry blistergall psyllid Pachypsylla celtidisvesiculum
1325049 hackberry blistergall psyllid Pachypsylla celtidisvesiculum
1325053 hackberry nipplegall maker Pachypsylla celtidismamma
1325061 juniper tip midge Oligotrophus betheli on Rocky Mountain juniper
1325058 hackberry bud gall maker Pachypsylla celtidisgemma
1325040 pine leaf adelgid Pineus pinifoliae galls on spruce
1325010 oak apple gall Amphibolips spp. opened to expose interior structure
1325001 pinyon spindlegall midge Pinyonia edulicola emerging from galls
1325004 pinyon spindlegall midge Pinyonia edulicola
1325029 cooley spruce gall adelgid Adelges cooleyi overwintering form in late winter
1325026 cooley spruce gall adelgid Adelges cooleyi within spruce gall
1325034 cooley spruce gall adelgid Adelges cooleyi nymphs and wax-coated honeydew droplets within gall
1325032 cooley spruce gall adelgid Adelges cooleyi
1325027 cooley spruce gall adelgid Adelges cooleyi winged adults emerging from spruce gall
1325024 cooley spruce gall adelgid Adelges cooleyi overwintered female on twig
1325031 cooley spruce gall adelgid Adelges cooleyi needle twisting associated with Douglas-fir
1325025 cooley spruce gall adelgid Adelges cooleyi symptoms of injury within week of initial infestation of terminal growth
1325036 cooley spruce gall adelgid Adelges cooleyi newly hatched nymphs settled at base of newly emerging spruce needles
1325068 honeylocust pod gall midge Dasineura gleditchiae larvae and pupa in gall
1325072 honeylocust pod gall midge Dasineura gleditchiae

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