Entomology Commons^™

Faunal Composition, Wing Polymorphism And Seasonal Abundance Of Some Flea Beetles (Coleoptera: Chrysomelidae) In Southern Quebec (Canada), Claire Levesque, Gilles-Yvon Levesque

The Great Lakes Entomologist

Chrysomelidae (51 taxa) were collected with flight intercept traps from May through October during 1987-1989, in four sites near a raspberry plantation in southern Quebec. More species and individuals of phytophagous flea beetles occurred in two open sites than at a pine woods-raspberry field boundary and in a pine woods. Longitarsus luridus complex, an immigrant taxon in North America, represented 58% of all captures in the two open sites where both Ranunculus acris and Plantago spp. are its main host plants; this species and Longitarsus rubiginosus were almost exclusively represented by jumping apterous adults in pans of flight intercept traps. …

Butterfly (Lepidoptera: Lycaenidae, Nymphalidae, And Satyridae) Faunas Of Three Peatland Habitat Types In The Lake Superior Drainage Basin Of Wisconsin, Jeffrey C. Nekola

The Great Lakes Entomologist

The butterflies which complete their entire life cycle within peatland habitats were documented in the Lake Superior drainage basin of northwestern Wisconsin. Seventy peatlands were inventoried over the course of the 1996 growing season, and were classified as either muskeg, kettlehole, or coastal sites. Muskeg peatlands were of similar elevation to the surrounding uplands, possessed drier and more nutrient-poor substrates, and were typically larger than other peatland types. Kettlehole peatlands were wetter and had floating Sphagnum mats which fringed lake margins or were in depressions much lower than the surrounding uplands. Coastal peatlands were located in estuaries along the Lake …

New Distribution Records Of Somatochlora Hineana (Odonata: Corduliidae), Wayne P. Steffens

The Great Lakes Entomologist

New records for Somatochlora hineana in Michigan are reported, extending the known distribution of the species by nearly 200 km to the northeast. Habitats are rich fens with shallow creeks, springs, small pools, and marl deposits.

Probable Displacement Of Riffle-Dwelling Invertebrates By The Introduced Rusty Crayfish, Orconectes Rusticus (Decapoda: Cambaridae) In A North-Central Wisconsin Stream, David C. Houghton, Jeffrey J. Dimick, Richard V. Frie

The Great Lakes Entomologist

The rapid northward range expansion of the rusty crayfish, Orconectes rusticus, and its negative effects on Wisconsin lakes have been the subjects of intense study throughout the last fifteen years. In this study, we investigated the possible impact of rusty crayfish on the benthic macroinvertebrate community structure of the Prairie River in north-central Wisconsin. Rusty crayfish and other invertebrates were collected during August and September, 1994, from three sections of the Prairie River. Rusty crayfish relative abundance increased significantly from the upper to middle, and middle to lower sections; and correlated negatively with a significant 77% decrease in total …

A Modification Of The Biotic Index Of Organic Stream Pollution To Remedy Problems And Permit Its Use Throughout The Year, William L. Hilsenhoff

The Great Lakes Entomologist

The biotic index of the arthropod fauna of streams is modified by limiting to ten the number of individuals in each taxon used in its calculation. This reduces detrimental effects on the index of certain fairly tolerant taxa in clean streams, effects of a few tolerant taxa in somewhat polluted streams, and the effect of our inability to identify larvae in some insect genera to species. It also greatly reduces seasonal variability, allowing use of the biotic index throughout the year with only a minimal decrease in the sensitivity of the index during the summer months. The EPT index was …

Caterpillars Of Eastern Forests. David L. Wagner, Valerie Giles, Richard C. Reardon And Michael L. Mcmanus. 1997. Usda Forest Service Fhtet-96-34, 113 Pp., Soft Cover., Mark F. O'Brien

The Great Lakes Entomologist

(excerpt)

Over the years, I have lamented the lack of a popular guide to Lepidoptera larvae. Aside from the classic Golden Guide to Butterflies and Moths (R.T. Mitchell and H. S. Zim, 1987. Golden Press, NY, 160 pp.), field guides have given scant attention to the larvae, illustrating only a few examples of common species.

Indiana Record For Onthophagus Taurus (Coleoptera: Scarabaeidae): Northwestward Range Extension, Adrienne E. Smith

The Great Lakes Entomologist

(excerpt)

The scarab, Onthophagus taurus Schreber, was introduced from Europe, although the details of its introduction are unknown (Fincher and Woodruff 1975). It was first collected in the Florida panhandle in 1971 (Fincher and Woodruff 1975); by 1974 its range had extended into Georgia, and by 1980 it had reached South and North Carolina (Fincher et al. 1983).

Enallagma Basidens (Odonata: Coenagrionidae) Expands Its Range Into Michigan, Mark F. O'Brien

The Great Lakes Entomologist

Enallagma basidens Calvert, a small bluet damselfly, has been expanding its range across North America since the early part of this century. It is now recorded from two widely-separated localities in the lower peninsula of Michigan.

Feasibility Of Using Cryostored Colorado Potato Beetle (Coleoptera: Chrysomelidae) Eggs For Rearing Edovum Puttleri (Hymenoptera: Eulophidae), R. F. W. Schroder

The Great Lakes Entomologist

Cryostored eggs of Colorado potato beetle, Leptinotarsa decemlineata (Say) eggs were suitable hosts for Edovum puttleri. Parasitism rates were low, however this study was first to show that rearing the parasite on eggs stored at ultra low temperatures (-70 0 C) is feasible. This method of storage will facilitate mass production of E. puttleri as well as prevent loss of the parasite in the event of a crash in the Colorado potato beetle colony.

New Records For Euhrychiopsis Lecontei (Coleoptera: Curculionidae) And Their Densities In Wisconsin Lakes, Laura L. Jester, Michael A. Bozek, Sallie P. Sheldon, Daniel R. Helsel

The Great Lakes Entomologist

The native aquatic weevil, Euhrychiopsis lecontei is currently being researched as a potential biological control for the exotic aquatic macrophyte Eurasian watermilfoil (Myriophyllum spicatum), yet little is known about its specific distribution in North America. In this study, E. lecontei was collected in 25 of 27 lakes surveyed for the weevil in Wisconsin, greatly increasing the known distribution of the species in this state. E. lecontei densities evaluated in 14 Wisconsin lakes ranged from <0.01 to 1.91 weevils per apical stem of milfoil. These new records indicate that E. lecontei is widespread throughout Wisconsin and is associated with natural declines of M. spicatum in some lakes. Additional sampling for E. lecontei and …

Relationship Between Fruit Yield And Damage By Codling Moth And Plum Curculio In A Biologically-Managed Apple Orchard, M. Sean Clark, Stuart H. Gage

The Great Lakes Entomologist

Fruit yield, codling moth (Cydia pomonella) damage, and plum curculio (Conotrachelus nenuphar) damage were monitored over an 8-year period in a O.5-ha, biologically-managed apple orchard in southwestern Michigan. The relationship between yield and damage was examined for both of these pests. The orchard showed clear biennial bearing patterns of alternating high and low yields. A significant negative correlation was found for yield and percent- age damage by codling moth but not for plum curculio damage. However, the estimated amount of fruit damaged by codling moth remained relatively stable over the period, indicating that changes in percentage damage depended on yield …

Life Cycle Of Isoperla Lata (Plecoptera: Perlodidae) In A Central Wisconsin Trout Stream, John B. Sandberg, Stanley W. Szczytko

The Great Lakes Entomologist

Monthly qualitative samples of Isoperla lata Frison were made from January 1992 to June 1993 in Ripley Creek, a small second order trout stream in Lincoln County Wisconsin. Additional collecting and an in-stream hatching experiment were conducted in 1994. This species exhibited an S1 (slow) univoltine life cycle. Emergence was synchronous and occurred in late April through early May when stream temperatures in the field were approximately 9-14° C and laboratory stream temperatures were 7-17° C. Laboratory longevity was 2-25 (x = 18.2 ± 4.51) days for males and 7-39 (x = 21.7 ± 5.35) days for females. Mean fecundity …

Susceptibility Of The Endangered Karner Blue Butterfly (Lepidoptera: Lycaenidae) To Bacillus Thuringiensis Var. Kurstaki Used For Gypsy Moth Suppression In Michigan, Catherine Papp Herms, Deborah G. Mccullough, Leah S. Baue, Robert A. Haack, Deborah L. Miller, Normand R. Dubois

The Great Lakes Entomologist

We investigated the phenological and physiological susceptibility of the endangered Karner blue butterfly (Lycaeides melissa samuelis) to Bacillus thuringiensis var. kurstaki (Bt), a product widely used for gypsy moth (Lymantria dispar) suppression in Michigan and other infested states. We monitored phenology of the bivoltine Karner blue in two regions of Michigan from 1993 to 1995 to determine if larval stages overlapped temporally with the period of Bt application for gypsy moth suppression. Karner blue larvae of the spring generation were found during the period that Bt was applied in nearby areas in 1993 only. However, spring-generation …

The Assassin Bug Zelus Luridus (Heteroptera: Reduviidae) In Michigan's Upper Peninsula, Philip A. Cochran, James R. Hodgson, Adam A. Leisten

The Great Lakes Entomologist

(excerpt)

On 17 July 1992, an assassin bug (Zelus luridus Stal) was flushed from the stomach of a smallmouth bass (Micropterus dolomieu) collected in West Long Lake of the University of Notre Dame Environmental Research Center, Gogebic County, Michigan.

Introduced Purple Loosestrife As Host Of Native Saturniidae (Lepidoptera), James G. Barbour, Erik Kiviat

The Great Lakes Entomologist

Purple loosestrife (Lythrum salicaria,Lythraceae) arrived in North America nearly 200 years ago. In 1969 we first found larvae of the native Cecropia (Hyalophora cecropia) and Polyphemus (Antheraea polyphemus) moths (Lepidoptera: Saturniidae) on loosestrife in the Hudson River Valley, New York, and we have since found Io (Automeris io) on this plant. A census of 4th and 5th instar saturniids in four 0.25 ha plots in purple loosestrife-gray dogwood (Cornus racemosa) wet meadows near Saugerties in 1984 indicated that Polyphemus and Cecropia larvae occurred much more frequently on loosestrife than on dogwood, a …

Urophora Affinis And U. Quadrifasciata (Diptera: Tephritidae) Released And Monitored By Usda, Aphis, Ppq As Biological Control Agents Of Spotted And Diffuse Knapweed, R. F. Lang, R. D. Richard, R. W. Hansen

The Great Lakes Entomologist

USDA, APHIS, PPQ has distributed the seedhead gall flies Urophora affinis and U. quadrifasciata (Diptera: Tephritidae) as classical biological agents of the introduced weeds spotted and diffuse knapweed (Centaurea maculosa and C. diffusa, respectively) (Asteraceae) in the United States. From 1987 to 1996, Urophora spp. have been released in 97 counties in 14 midwestern and western states. Established populations of U. affinis and U. quadrifasciata are confirmed in 85 and 95 counties, respectively, among all 14 states. These include the first reports of successful establishment of Urophora spp. in Arizona (two counties), Colorado (eight counties), Michigan (one county), Minnesota …

Effects Of Feeding By Two Folivorous Arthropods On Susceptibility Of Hybrid Poplar Clones To A Foliar Pathogen, Kier D. Klepzig, Daniel J. Robison, Eugene B. Smalley, Kenneth F. Raffa

The Great Lakes Entomologist

We investigated variation in folivore-induced effects on subsequent plant suitability to a foliar pathogen. We used a leaf disk assay to expose three clones of hybrid poplar, NC11382, NE332 and NM6, to colonization by a leaf spot pathogen, Septoria musiva. Undamaged leaf disks of NE332 were the most resistant to S. musiva, followed by NM6 and NC11382, respectively. To test the effects of prior herbivory on subsequent susceptibility to this fungal pathogen, we inoculated S. musiva on leaf disks taken from leaves which had been exposed to feeding by Tetranychus mites or cottonwood leaf beetles. Prior activity by …

Evaluation Of Paederus Littorarius (Coleoptera: Staphylinidae) As An Egg Predator Of Chrysoteuchia Topiaria (Lepidoptera: Pyralidae In Wisconsin Cranberry Bogs, Sandra Haase-Statz

The Great Lakes Entomologist

A preliminary study was conducted to determine if the rove beetle, Paederus littorarius Grav., would exhibit a feeding preference for the eggs of the pyralid moth, Chrysoteuchia topiaria Zeller, a pest in Wisconsin cran­berry bogs. Individuals were offered a choice of C. topiaria eggs or Drosophila sp. adults for four days. Total number of prey items eaten was converted to weight using a multiplier based on the mean weight of 20 individuals of each prey item, respectively. A significant preference for Drosophila adults was observed in the preference trial; however as many as 24 C. topiaria eggs in addition to …

Hexagenia Bilineata (Ephemeroptera: Ephemeridae) Persists At Low Levels Of Abundance In The Lower Fox River, Wisconsin, Phillip A. Cochran, Andrew P. Kinziger

The Great Lakes Entomologist

After burrowing mayflies (Hexagenia bilineata) were first noted in the vicinity of the DePere Dam on the Fox River in 1991, adults have been observed in small numbers each summer since then. It is possible that the Fox River population has remained at low levels because of an Allee effect. In addition, it is possible that the population is still limited by poor environmental quality, presumably in the upper layer of sediment inhabited by the larvae. Two other relatively sensitive species associated with benthic habitat, the sea lamprey (Petromyzon marinus) and the lake sturgeon (Acipenser fulvescens), have been observed in …

New Record Of Brachycercus Maculatus Berner (Ephemeroptera: Caenidae) From New York And A Key To Larvae Of Northeastern Species, Steven K. Burian, Margaret A. Novak, Robert W. Bode, Lawrence Abele

The Great Lakes Entomologist

Brachycercus maculatus, a member of a rare group of mayflies, is now recorded for the first time from New York State in the upper Hudson River. An illustrated key to the Brachycercus larvae of northeastern North America is provided to spur further study of the genus in the region.