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Biology studies of Macrosiphum avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum padi (L.) on Gramineae in western Oregon

Creator:: Greene, Gerald L.
Abstract:: Field biology studies of three grain aphids, Macrosiphum avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum padi (L.) were conducted near Corvallis, Oregon, from 1961 to 1964. Populations of M. avenae were found on grain plants, and alatae entering spring barley may have been from wheat fields. Specimens were found more...
Resource Type:: Dissertation
Full Text:: , 4 p. 272), and North America as summarized by Orlob and Medler (67). Dickason, et al. (17) and

The comparative histochemistry of the decapod antennal gland--esterases, phosphatases and glycogen

Creator:: Fuller, Eugene G.
Abstract:: The distributions of alkaline phosphatase, acid phosphatase, non-specific esterases, and glycogen were described for the antennal glands of the freshwater crayfish, Pacifastacus, and the marine crabs Cancer and Pugettia. Alkaline phosphatase is confined primarily to the luminal edge of the labyrinth in all of the above forms whereas acid phosphatase...
Resource Type:: Dissertation
Full Text:: (Markert and Hunter, 1959; Hunter, et. al. , 1964). The esterases have been investigated

The biology and behavior of the alkali bee Nomia melanderi Cockerell (Hymnoptera: Apoidea)

Creator:: Hackwell, Glenn Alfred
Abstract:: Nomia melanderi Cockerell is one of the most efficient pollinators of alfalfa in Eastern Oregon. Emergence begins in June, usually reaches its peak in early July, and may continue into early August. Male emergence precedes female emergence by four or five days. For the first few weeks of this time,...
Resource Type:: Dissertation
Full Text:: - tate its excavation. The most widely used is plaster of paris (Malyshev, 1936 and Michener et al

Mechanisms of orientation in the leaf-cutter bee Megachile rotundata (Fabricius)

Creator:: Osgood, Charles Edgar
Abstract:: The leaf- cutter bee Megachile rotundata (Fabricius) is an important alfalfa pollinator in western North America. This study was designed to provide information on methods of orientation used by M. rotundata in order to make recommendations regarding the parameters within which adult nesting populations may be relocated. Preliminary studies suggest...
Resource Type:: Dissertation
Full Text:: honeybee. Stephen et al. (1968) list approximately 3, 500 bee species in America north of Mexico of

Essential fatty acids in noctuid moths : their nutrition and metabolism

Creator:: Grau, Philip Alvin, 1941-
Abstract:: The polyunsaturated fatty acids (PUFA) are known to be required for larval growth and normal wing development in several species of Lepidoptera but most of the basic information necessary for a complete understanding of this nutritional phenomenon has not been gathered. This includes the role of each of the essential...
Resource Type:: Dissertation
Full Text:: diets. Most vegetable oils contain one or both of these fatty acids as major components. Beck et al

The effects of synthetic juvenile hormone on the leafhopper, Draeculacephala crassicornis

Creator:: Reissig, William Harvey
Abstract:: The effects of synthetic juvenile hormone on the viability of eggs, metamorphosis of nymphs, and mating behavior of males and females in diapause was investigated by treating Draeculacephala crassicornis with ENT 33972a. The viability of eggs was reduced 14% by a small dose (0.001 μg) of synthetic juvenile hormone applied...
Resource Type:: Dissertation
Full Text:: differ in chemical structure from the true juvenile hormone of cercropia (Roller et al., 1967), but

Effects of temperature and other abiotic and biotic factors on development and survival of the immature stages of the alfalfa leafcutting bee, Megachile pacifica (Panzer) (=rotundata (F.)) (Hymenoptera:Megachilidae)

Creator:: Undurraga O., Jaime M.
Abstract:: Larval mortality of leafcutting bee, Megachile pacifica (Panzer) (= rotundata (F.)), is high, usually exceeding 50%. Parasites and predators are not a limiting factor in the survival of the progeny. The disease chalk brood has been an important mortality factor since 1974. Inadequate food supply, pollen and nectar, may affect...
Resource Type:: Dissertation
Full Text:: honey bee in pollinating alfalfa (Bohart, 1962; Stephen, 1961, 1962; Klostermeyer et al., 1973; Batra

A three-trophic-level perspective on factors influencing herbivore abundance on collard

Creator:: McIver, James D.
Abstract:: The influence of natural enemies and plant apparency in determining the abundance of the cabbage aphid Brevicoryne brassicae L. and the imported cabbageworm Pieris rapae L. was examined on collards grown in a collard monoculture and in a collard-alfalfa biculture. This design was used to examine the factors affecting collardherbivore...
Resource Type:: Dissertation
Full Text:: of alternate prey or habitat (Leius 1967; Vlijm et al. 1974; Sunderland 1975). Theory suggests that

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Creator:: Schisler, David Albert
Abstract:: Fusarium spp. frequent conifer nursery soils yet are rarely recovered from coniferous forest soils. Experiments were performed to determine what influence humic-rich organic amendments and volatiles from soil, ectomycorrhizal fungi and ectomycorrhizae have on the populations of several physiologic and taxonomic microbial groups potentially related to this phenomenon. A comparative...
Resource Type:: Dissertation
Full Text:: needle litter leachates (Menzinger, 1969; Toussoun et al., 1969; Hammerschlag and Linderman, 1975), the

Marine herbivore-plant interactions : the feeding ecology of the sea slug Placida dendritica

Creator:: Trowbridge, Cynthia D.
Abstract:: The feeding ecology of a common temperate mesoherbivore, the oligophagous sea slug Placida dendritica (Gastropoda: Opisthobranchia: Ascoglossa), was examined from April 1985 to June 1989. Along the central coast of Oregon, Placida consumed three host species: the low intertidal green algae Codium setchellii, C. fragile, and Bryopsis corticulans. Individual slugs...
Resource Type:: Dissertation
Full Text:: Brostoff 1983, Hay 1985, Carpenter 1986, S.M. Lewis 1986, Menge et al. 1986, Schiel and Foster 1986, and

ScholarsArchive@OSU

Biology studies of Macrosiphum avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum padi (L.) on Gramineae in western Oregon

The comparative histochemistry of the decapod antennal gland--esterases, phosphatases and glycogen

The biology and behavior of the alkali bee Nomia melanderi Cockerell (Hymnoptera: Apoidea)

Mechanisms of orientation in the leaf-cutter bee Megachile rotundata (Fabricius)

Essential fatty acids in noctuid moths : their nutrition and metabolism

The effects of synthetic juvenile hormone on the leafhopper, Draeculacephala crassicornis

Effects of temperature and other abiotic and biotic factors on development and survival of the immature stages of the alfalfa leafcutting bee, Megachile pacifica (Panzer) (=rotundata (F.)) (Hymenoptera:Megachilidae)

A three-trophic-level perspective on factors influencing herbivore abundance on collard

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Marine herbivore-plant interactions : the feeding ecology of the sea slug Placida dendritica

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