Entomology Commons^™

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.

Notes On The Life Histories Of Acrosternum Hilare And Cosmopepla Bimaculata (Heteroptera: Pentatomidae) In Southern Illinois, J. E. Mcpherson, D. L. Tecic

The Great Lakes Entomologist

The life histories of Acrosternum hilare and Cosmopepla bimaculata were studied in southern Illinois from May 1972 to September 1974 and from September 1992 to June 1995. Both species were bivoltine, overwintered as adults, and became active in early spring. The subsequent generations were characterized by marked overlapping of the nymphal instars. No active adults were found after early November.

Nearctic Acleris: Resurrection Of A. Stadiana And A Revised Identity For A. Semiannula (Lepidoptera: Tortricidae), Michael Sabourin, Ronald J. Priest, William E. Miller

The Great Lakes Entomologist

Type study showed that Acleris stadiana (Barnes & Busck), currently considered a junior synonym of A. semiannula (Robinson), is in fact a distinct taxon. Although superficially similar, these taxa differ markedly in genital structure. In males of A. semiannula, the aedeagus is short, broad, and virtually straight, whereas in those of A. stadiana, it is long, thin, and sharply bent. What was known in literature as A. semiannula proved to be A. stadi­ana. We redefine both A. semiannula and the resurrected A. stadiana.