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Is Aprostocetus hagenowii (Ratzeburg) (Eulophidae) which can attain a maximum parasitism No data are available for the United States. Parasitism of cockroaches by Evania appendigaster reached 29% in populations of Periplaneta americana in They are not known to sting humans.īiological Control Potential (Back to Top) They are sometimes attracted to flowers such as parsley and fennel andĪlso to honeydew. Jagged hole which it cuts near the end of one of the long sides of the egg case. At maturity the adult makes its escape through a small round There are at least three generations per year in some areas, but no information is available for Pupation occurs within the egg case without a cocoon. The penultimate and mature larva have stockier mandibles with the tridentateĬutting edge replaced by a narrow curved ventral denticle and a long blunt dorsal one. The next two instars have longer, tridentate mandibles without This unusual armature enables the larva to cut through Each larval instar has distinctive mandibles. The developing larva undergoes five molts during which time it devours all of theĮggs. This usually takes from 15 to 30 minutes.
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Much wriggling of the abdomen, she eventually penetrates the tough integument of the egg caseĪnd inserts her ovipositor.
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Before long, theįemale lies on her side with her body parallel to the long axis of the egg case with the legsīraced against the latter and the body against a substrate. Upon finding a cockroach egg case, the female vibrates her antennae over it.
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Photograph by Division of Plant Industry. Ventral view of an adult Evania appendigaster (L.), a cockroach egg parasitiod, showing the wide separation of the midcoxae from the hindcoxae. Hindcoxae (distance about twice length of midcoxa) is diagnostic.įigure 2. From Prosevania petiolatus and other species, the wide separation of the midcoxae from the It from all other species (at most with forewing length of 5.0 mm) in the Nearctic RegionĮxcept for Prosevania petiolatus (Brullé) which is not recorded from Florida, but occurs in The large size of this all-black species (length of forewing 5.5 to 7.0 mm) readily distinguishes World, northward into Palearctic and Nearctic regions. Probably of Oriental origin, but now widely ranging in tropical and subtropical areas of the Photograph by Donald Hall, University of Florida. Adult Evania appendigaster (L.), a cockroach egg parasitoid. Wasps." A systematic account is given by Townes (1949) and biological considerations byįigure 1. Giving the appearance of a small hand flag, hence the common name of the family "ensign Of the abdomen (gaster) small, laterally compressed, oval (male) to subtriangular (female) Hymenoptera have the abdominal petiole attached near the top of the propodeum, with the rest General body shape provides an easy recognition feature of this family since no other This probably oriental species is a specimen captured in Washington, D.C. Household cockroaches ( Blatta orientalis L., Periplaneta americana (L.), PeriplanetaĪustralasiae (F.)) are parasitized by an imported ensign wasp, Evania appendigaster (L.).Īdult wasps are occasionally seen in city buildings and homes.
#Urban egg professional
His professional journey from architecture to industrial design has given him a critical eye for looking at problems of varying scales and using design as a joyful tool for crafting a more meaningful experience of life.Scientific name: Evania appendigaster (Linnaeus) (Hymenoptera: Evaniidae) Introduction - Distribution - Identification - Biology - Biological Control Potential - Selected References Introduction (Back to Top) Paolo is a budding designer, a loving husband and very soon, a proud father. However, with the rapid densification of cities and the dwindling availability of green space, the project proposes a product system for raising chickens in the city with three different components: 1) A modular, scalable, chicken coop + run system that is designed to be installed in a rooftop farm, 2) a piece of outdoor furniture with a built-in chicken coop for raising chickens on a balcony, and 3) a chicken carrier case that doubles as a nesting box for raising chickens indoors. With the growing awareness of the issues surrounding industrial egg farming operations, hen-keeping provides a great alternative to those who would like to have more control over their food source. The project tackles local food production focusing on egg farming in an urban environment.