Entomology Commons^™

Effects Of Aluminum Foil Mulch On Parasitism And Fecundity Of Apterous Myzus Persicae (Homoptera: Aphididae), Frank G. Zalmon, Whitney S. Cranshaw

The Great Lakes Entomologist

Chinese cabbage plants grown in flats containing either aluminum foil mulch or no mulch cover were uniformly infested with a single apterous adult Myzus persicae (Sulzer) and exposed in a greenhouse to a free-flying population of the parasite Aphidius ervi (Haliday). Aphid fecundity. plant growth, and temperature were greater in reflective mulch plots. Aphid pardSitism was lower over mulched plots until foliage growth obscured the mulch. Later. parasitism was more frequent in mulched plots. The effects upon parasitism, fecundity. and microclimate may explain instances where aluminum mulches have not reduced aphid populations.

The Response Of Aspen (Populus Tremuloides) To Artificial Defoliation, A. C. Hodson

The Great Lakes Entomologist

(excerpt)

In the summers of 1939 and 1940 hand defoliation oftrembling aspen, Populus tremuloides Michx., was carried on in a young stand located a few miles north of Itasca State Park. This study was undertaken to determine the response of aspen trees to several amounts of defoliation at four different times during the summer. Other similar artificial defoliation studies have been reported by Wallace (1945), Giese et al. (1964), Skilling (1964), Kulman (197 I), and Heichel and Turner (1976).

True And False Foodplants Of Callosamia Promethea (Lepidoptera: Saturniidae) In Southern Michigan, W. H. Wagner Jr., Michael K. Hansen, Michael R. Mayfield

The Great Lakes Entomologist

A survey in 1980 of the associations of over 400 cocoons of Callosamia promethea Drury in vegetation along and adjacent to southern Michigan roadsides gave evidence for seven species of true larval foodplants (not including two others known in the area from other studies) and 17 species of false foodplants, the latter determined by the (1) rarity of their association with cocoons, (2) only one or two cocoons per plant, and (3) their proximity to a well known true foodplant. Three species, sassafras, black cherry, and buttonbush, are evidently the most important true foodplants in this area. Comparisons are made …

Resource Partitioning By Two Species Of Stream Mayflies (Ephemeroptera: Heptageniidae), William O. Lamp, N. Wilson Britt

The Great Lakes Entomologist

We compared the phenology of nymph development, food type, and habitat selection of two stream mayflies, Stenacron interpunctatum (Say) and Stenonema pulchellum (Walsh) in Big Darby Creek, Ohio. Both species, which grow principally from autumn through early spring, emerged from the stream throughout the summer. The nymphs consumed the same sizes and types of food particles from deposits on stones, mostly in the form of detritus. As a result of morphological and behavioral adaptations, S. pulchellum lived on stones in swift water whereas S. interpunctatum lived on stones in a slower current.

The Influence Of Reflective Mulches And Lettuce Types On The Incidence Of Aster Yellows And Abundance Of Its Vector, Macrosteles Fascifrons (Homoptera: Cicadelidae), In Minnesota, Frank G. Zalom

The Great Lakes Entomologist

Five commercial lettuce cultivars representing different genetic types were grown through aluminum-coated paper, through black polyethylene film, and on bare soil. For each variety, the aluminum mulch reduced the numbers of Macrosteles fascifrons (St~l), reduced the incidence of aster yellows, and increased yields when compared to uncovered controls. The head lettuce cultivar 'Minetto' was most susceptible on unmulched plots (74.3%) while the leaf cultivar 'Grand Rapids' was least susceptible (33.8%). The latter also had the greatest infestation of leafhoppers which may indicate either resistance to the aster yellows agent or shorter feeding times by the vector leafhopper. The abundance of …

Development Of Orius Insidiosus (Hemiptera: Anthocoridae) In Relation To Temperature, P. C. Kingsley, B. J. Harrington

The Great Lakes Entomologist

A developmental threshold of lO.3°C and a thermal constant of 307 day-degrees C were estimated for a Wisconsin population of Orius insidiosus (Say) (Hemiptera: Anthocoridae) by rearing eggs and nymphs at various constant temperatures.

Seasonal Flight Patterns Of Hemiptera In A North Carolina Black Walnut Plantation. 6. Tingidae And Aradidae, J. E. Mcpherson, B. C. Weber

The Great Lakes Entomologist

The seasonal flight patterns of II species of Tingidae and six species of Aradidae collected in window traps in a North Carolina black walnut plantation are described. Flying height distributions and seasonal flight activities of Corythucha ciliata (Say) and Gargaphia solani Heidemann are considered in detail.

Seasonal Flight Patterns Of Hemiptera In A North Carolina Black Walnut Plantation. 5. Lygaeoidea, J. E. Mcpherson, B. C. Weber

The Great Lakes Entomologist

The seasonal flight patterns of 31 species of Lygaeoidea collected in window traps in a North Carolina black walnut plantation are described. Flying height distributions and seasonal flight activities of Antillocoris pilosulus (Stlh), Crophius disconotus (Say) and Geocoris punctipes (Say) are considered in detail.

The First Record Of Phrictopyga Occidentalis In The United States (Homoptera: Fulgoroidea: Delphacidae), Stephen W. Wilson

The Great Lakes Entomologist

Phrictopyga occidentalis (Muir) has been reported from Puerto Rico, Mexico, and Ecuador (Caldwell and Martorell, J. Agric. Univ. P. R. 34:133-269, 1950).

An Investigation On The Larval Habitat Of Five Species Of Tree-Hole Breeding Mosquitoes (Diptera: Culicidae), Lee Mitchell, C. Lee Rockett

The Great Lakes Entomologist

A two-year study on the larval habitat of five species of tree-hole breeding mosquitoes was conducted in the vicinity of Bowling Green, Wood County, Ohio. Ninety-eight tree holes containing mosquito larvae were studied. Larval collections (27,741 specimens) were comprised of Aedes rriseriarus (90.8%), Orrhopodomyia signifera (3.3%), Aedes hendersoni (3.2%), Anopheles barberi (2.7%) and Orrhopodomyia alba (< 0.1%). Chemical parameters (BOD, tannin-lignin, pH, and conductivity) of different tree holes were evaluated. Although different tree-hole species were commonly found in association with one another at breeding sites, ecological differences between species were found in spatial, trophic, and temporal niche dimensions.