Contents: By Damage and Image
In progress
Contents: Alphabetical

alder flea beetle
aphid management
apple and thorn skeletonizer
apple ermine moth
ash whitefly
azalea bark scale
azalea lace bug
azalea sawfly
Bagrada bug
bark lice
Barypeithes root weevil
Beneficial nematodes
biocontrol of root weevils
birch aphid
black bean aphid
black cherry aphids
black stem borer
bluegum psyllid
Boisduval scale
branch and twig borer
brown marmorated stink bug

bronze birch borer
boxwood leafminer
boxwood psyllid
bulb flies
cabbage whitefly
carnation tortrix
carpet beetle (images)
Calligraph californica

Ceanothus stem gall moth
cereal leaf beetle
cherry ermine moth
chilli thrips
cinnabar moth
clay colored weevil
cottony camellia scale

crane flies
cypress tip moth

dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
elm leafminer
European pine sawfly new
European pine shoot moth
European wool carder bee
emerald ash borer
Fall webworm
fir coneworm new
flatheaded cedar borer
ground beetle gallery
Hemerocallis gall midge new
hollyhock weevil
honeylocust plant bug
honeylocust pod gall midge
Heliothis phloxiphaga
holly bud moth
huckleberry root aphids
ground mealybug
Japanese beetle
lady beetle gallery
leaf weevil
light brown apple moth
Linden aphid new
lupine aphid new
Macrosiphum rhamni new
maple aphids
maple tip moth
maple midge
March flies
mountain ash sawfly
Myzocallis sp. on red oak new
Narcissus bulb fly
natural enemies gallery
oak ambrosia beetle
oak slug
oak twig gall wasp
obscure root weevil
Pacific flatheaded borer
peach tree borer
peach twig borer
pear blight beetle
pear psylla
pear leaf-curling midge
pear sawfly
pine needle scale
pine and cone spittlebug
poplar and willow borer
Psyllopsis fraxinicola
rose curculio weevil
rose midge
rove beetle gallery
rose stem girdler new
sequoia pitch moth
soldier beetle gallery
snakefly gallery
speckled green fruitworm
meadow spittlebug
spotted asparagus beetle
spruce twig aphid
tent caterpillars
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil
woolly alder aphid new
woolly ash aphid
woolly beech aphid

Back to Home

Contact Us

Honeylocust pod gall midge

Honey locust pod gall midge (Dasineura gleditchiae) is a major pest of honey locust (Gleditsia triacanthos). Feeding by the midge larvae causes leaflets of new growth to form pod like galls in which the larvae pupate. After the adult midge emerges from the pod, the leaf tissue dies and drops prematurely. Much of the new growth can be affected, reducing the aesthetic quality of the trees in nurseries and landscapes. All cultivars of G. triacanthos grown commercially are susceptible in both nursery and landscape situations.


Adult midges deposit eggs on new foliage along the rachis or on the edges of developing leaf buds. The eggs usually hatch in two days. The young larvae crawl along the leaf and begin feeding. Only one larva is required to initiate galling of the leaf. Leaf galls may be folded, partially podded, or the entire leaf may form a pod (Thompson, et al., 1998). The leaf gall dies and drops once the larvae pupate and emerge. Localized die-back is often associated with high infestation levels.

Midge Biology and Phenology

Research in California investigating overwintering and distribution of the pod gall midge indicates that the midge overwinters as late instar larvae or pupae in cocoons in the soil mostly in the upper two inches near the base of the tree trunks (generally within one foot of the trunk) (Thompson, et al.,1998). In the Northwest, study of midge phenology has shown discrete egg laying events occurring very early in the maturation of the leaf buds (before they leaf out) in Oregon (Rosetta and Bell, 1996). Soon thereafter the populations appear continuous with many life stages present. The first pod gall midge eggs generally are  found during the last week of March through the first week of April (Table 1). In 2000 the first evidence of oviposition occurred on April 7 and pod formation on April 13.


Year 1995 1996 1997 1998 1999 2000
eggs March 30 April 8 April 4 N/A April 19 April 7
podding April 27 April 15 April 21 N/A April 28 April 13

Table 1. Appearance of honey locust pod gall midge, Dasineura gleditchiae, egg deposition and pod formation at various Oregon sites from 1995 through 2000.


For more accurate application timing, monitor honey locust trees in nursery and landscape sites beginning in early spring and throughout the growing season to note appearance of eggs deposited on buds and new foliage by
over wintering and first generation adults. Clusters of the red midge eggs on honey locust buds can be observed with a hand lens.


A critical window for enhanced control of the midge is targeting the first two egg depositions beginning in late March or early April with horticultural oil or oil/insecticide applications. These targeted sprays suppress midge populations, reducing the frequency and intensity of pesticide applications necessary to achieve acceptable control.

Our research has investigated the efficacy of soil drenches of the over wintering stages of the midge. These drenches are applied shortly before emergence of the adult midges in the spring. Our trials have shown a well-timed drench can greatly reduce the number of pods on honeylocust trees. Once midges have emerged in the spring, they no longer pupate in the soil but rather within the leaf galls.

Honeylocust pod gall midge is native to the east coast of North America where populations of the pest are generally maintained below an economic threshold by a complex of natural enemies. This may bode well for eventual suppression of the midge through biological control on the west coast.

For further information on management options, see the Nursery section of the PNW Insect Management Handbook.

References Cited:

Thompson, P.B. and M.P. Parrella.1998. Distribution and Density of Over wintering Dasineura Gleditchiae (Osten Sacken)(Diptera: Ceciomyiidae).Pan Pacific Entomologist. 74(2):85-98.

Rosetta, R.L., P. Thompson and N. Bell. 1998. IPM of Honey Locust Pod Gall Midge.The Digger. 42(3):34-36.

Original: 30 April 2013

Updated 23 March 2017.

Author: R.L. Rosetta, Extension Nursery Integrated Pest Management, Department of Horticulture, Oregon State University/NWREC.



Honeylocust pod gall midge adult on honeylocust bud
honeylocust pod gall midge

Honeylocust pod gall midge adult on honeylocust bud
honeylocust pod gall midge on bud

Honeylocust pod gall midge adult
honeylocust pod gall midge adult

Honeylocust pod gall midge eggs
honeylocust pod gall eggs
Photo: Thirza Collins

Honeylocust pod gall midge eggs
honeylocust pod gall midge eggs

Monitoring for honeylocust pod gall midge
monitoring for honeylocust pod gall midge

Honeylocust pod gall midge galls
honeylocust pod gall midge galls

Podding by honeylocust pod gall midge
Galls of honeylocust pod gall midge

Honeylocust pod gall midge pupal cases and newly emerged adult
honeylocust pod gall midge pupal cases and newly emerged adult

Website editor:
Robin Rosetta

Page last modified 3/23/17


Before applying any of the information found on this site, please read our disclaimer.
Copyright © 2019, All Rights Reserved

Oregon State University Extension Service prohibits discrimination in all its programs, services, activities, and materials on the basis of race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, familial/parental status, income derived from a public assistance program, political beliefs, genetic information, veteran’s status, reprisal or retaliation for prior civil rights activity.
El Servicio de Extensión de Oregon State University prohíbe la discriminación en todos sus programas, servicios, actividades y materiales en base a la raza, color, origen nacional, religión, sexo, identidad de género (incluyendo la expresión de género), orientación sexual, discapacidad, edad, estado civil, estatus de la familia/padres, ingresos derivados de un programa de asistencia pública, creencias políticas, información genética, estado de veterano, represalia o represalia por actividad previa de los derechos civiles.