Life Sciences Commons^™

Economics Of Cell Partitions And Closures Produced By Passaloecus Cuspidatus (Hymenoptera: Sphecidae), John M. Fricke

The Great Lakes Entomologist

Sphecid wasps, Passaloecus cuspidatus were observed gathering fresh pine resin (Pinus strobus) which they used for creating partitions and closures in their nests. Based upon measurements taken of the cells, and an estimate of the load carried by the wasps, the number of collecting trips made by the wasps was correlated with the quantity of resin contained within the nest partitions and closures.

A Note On The Sympatric Collection Of Chymomyza (Diptera: Drosophilidae) In Virginia's Allegheny Mountains, Henretta Trent Band

The Great Lakes Entomologist

The attraction of two Chymomyza species, C. procnemoides and C. aldrichii, to the same damaged tree over 19 days in summer 1987 near Mt. Lake Hotel, Giles Co., Virginia is documented, confirming a previous report that Chymomyza species may be sympatric on the same fresh damaged tree/cut wood. A total of 17 males and 7 females were captured. An excess of males to females captured has been reported in Japan and Hungary.

Slaterobius Insignis (Heteroptera: Lygaeidae): Association With Granite Ledges And Outcrops In Minnesota, A. G. Wheeler Jr.

The Great Lakes Entomologist

Adults and late-instar nymphs of the wide-ranging myrmecomorphic lygaeid Slaterobius insignis were collected in northern Minnesota from cracks of granite outcrops and ledges, a habitat differing somewhat from that reported elsewhere. At two of the four sites, S. insignis was observed in plant-and litter-filled cracks with nymphs of the lygaeid Trapezonotus arenarius. All adults of the polymorphic S. insignis observed on granite were brachypters that belonged to the dark color morph of the species. Individuals occurred on rock surfaces with a black ant, Formica subsericea, which they resembled in appearance and behavior.

An Allometric Study Of The Boxelder Bug, Boisea Trivittata (Heteroptera: Rhopalidae), Scott M. Bouldrey, Karin A. Grimnes

The Great Lakes Entomologist

An allometric study was conducted on the boxelder bug, Boisea trivittata, to confirm the number ofinstars and to identify characteristics most useful for rapid instar identification of field samples. Analysis of field populations collected throughout the 1990-92 seasons indicated that there were five instars, clearly defined on the basis of size and the presence of wing pads. This finding is in contrast with the only other published study on stages of the boxelder bug, which claims there are six nymphal instars.

Size data gathered from field populations were substantiated by laboratory growth studies. Head width and/or second antennal segment …

Parasitism Of Plathypena Scabra (Lepidoptera: Noctuidae) By Sinophorus Teratis (Hymenoptera: Ichneumonidae), Daniel M. Pavuk, Charles E. Williams, Douglas H. Taylor

The Great Lakes Entomologist

(excerpt)

A study was conducted at the Ecology Research Center, Miami University, Butler County, Ohio, during the summer of 1990 to examine the effects of strip intercropping sorghum and soybean on the occurrence of parasitoids and incidence of disease in larvae ofthe green cloverworm, Plathypena scabra (F.) (Lepidoptera: Noctuidae), a sporadic pest of soybeans. The details of the experimental design and results are reported elsewhere (Williams et al. 1995).

Temperature Effects On Development Of Three Cereal Aphid Parasitoids (Hymenoptera: Aphidiidae), N. C. Elliot, J. D. Burd, S. D. Kindler, J. H. Lee

The Great Lakes Entomologist

Temperature is an important climatological variable that influences the biology and ecology of insects. Poor climatic adaptation can limit the effectiveness of parasitic insects in biological control. Two exotic parasites (Syrian Diaeretiella rapae (M'Intosh) and Argentinean Aphidius colemani Viereck) imported for biological control of the Russian wheat aphid, Diuraphis noxia (Mordvilko), and one native parasite (Diaeretiella rapae) were reared in growth chambers in three fluctuating temperature regimes with average daily temperatures of 12, 18, and 24°C. Estimates of temperature thresholds for immature development were 3.3, 3.5, and 2.8°C, for Oklahoman D. rapae, Syrian D. rapae, and …

Resource Selection, Survival, And Departure Of Adult Female Mallards From The Lake St. Clair Region During Autumn And Winter, Matthew Palumbo

Electronic Thesis and Dissertation Repository

During autumn and winter, mallards (Anas platyrhynchos) maximize fitness through their spatiotemporal distribution to avoid mortality risks while balancing trade-offs to access foods to undergo migration and maintain homeostasis. Thousands of mallards use Lake St. Clair as it is an important, but threatened, migratory staging area in the Great Lakes. My goal was to understand how mallards were selecting resources in the region and potential relationships of selection strategies. My objectives were to estimate resource selection of adult female mallards, in relation to perceived risk of hunting mortality, and determine if selection strategies were related to survival and …

The Gonotrophic-Age Structure Of A Population Of The Simulium Venustum Complex (Diptera: Simuliidae) In Algonquin Park, Ontario, Stephen M. Smith, Alan Hayton

The Great Lakes Entomologist

Eight techniques for the determination of parity and gonotrophic age were assessed for the obligatorily anautogenous blackfly-species complex, Simulium venustum Say. All females could be age-graded by the presence or absence of dilatations on the ovarioles. However, multiple dilatations on a single ovariole were not found and the Polovodova method could not be used to determine the number of completed gonotrophic cycles. Most females could be age-graded by the appearance of the Malpighian tubules, which undergo morphological changes, probably as a result of a bloodmeal. In some cases, the size of the fat body, the presence of retained (relict), mature …

Survey Of Predators Associated With European Red Mite (Panonychus Ulmi; Acari: Tetranychidae) In Ohio Apple Orchards, Celeste Welty

The Great Lakes Entomologist

A survey was conducted to identify the types and relative abundance of predatory arthropods associated with Panonychus ulmi in 21 Ohio apple orchards. Mite populations were sampled by leaf brushing, and insects and spiders were sampled by limb jarring. A state-wide survey was conducted in early July and in late August 1992, and five blocks were evaluated periodically from May until August 1992 at one farm in central Ohio. Predatory mites were detected in only 27% of the blocks surveyed in early July, but in 74% of the blocks surveyed in late August. The ratio of predatory mites to motile …