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Clover Disease : What Do We Know And What Can We Do, T Marshall

Journal of the Department of Agriculture, Western Australia, Series 4

A review of 30 years' study and practical experience of clover disease in Western Australia—and a summary of current recommendations for reducing problems in sheep grazing pastures based on oestrogenic subterranean clover.

Natural Control Of Insect Pests On The Ord?, P J. Michael

Journal of the Department of Agriculture, Western Australia, Series 4

Current trials conducted by the Department of Agriculture at Kununurra are indicating that there may be an important place for biological control of insect pests of the Ord River Irrigation Area.

The Role Of Nematodes In A South Dakota Grassland Ecosystem, James D. Smolik

Electronic Theses and Dissertations

In an attempt to elucidate the role of nematodes in a grassland ecosystem nematode taxa, number and biomass data was gathered over a three year period at the Cottonwood International Biological Program Grassland Biome site in western South Dakota. The effects of grazing intensity, sampling date and sampling depth were studied. Nematicide treatment of range grasses in field and greenhouse studies was also used to evaluate the role of nematodes. Biomass data was used to estimate the intake of plant feeding nematodes. Results obtained demonstrate that soil inhabiting nematodes constitute a significant proportion of the consumer biomass at the Cotton[1]wood …

Organization Of The Primary Body In The Root Of Cyclamen Persicum Mill, Marshall D. Sundberg

Journal of the Minnesota Academy of Science

The primary body of the root of Cyclamen persicum Mill. is described. The rootcap consists of two components of separate origin. Cells of the columella are derived from the dermatocalyptrogen by periclinal wall formation. Further growth of the columella is due primarily to the increase in size of existing cells. Cells of the lateral rootcap arise from the protoderm by periclinal wall formation. Continued growth in this region is due to both increase in cell number and increase in size of existing cells. Proximal to the dermatocalyptrogen is the presumptive quiescent center. Around the periphery of this zone are located …

Natural Areas And Reference Collections For Environmental Education In Some Arkansas Schools, Jewel E. Moore

Journal of the Arkansas Academy of Science

A survey of 20 school campuses throughout Arkansas showed that most lack natural areas for outdoor environmental education. For most Arkansas schools no checklists of local plants are available, and there are no reference collections at the schools. Projects are underway at State College of Arkansas to establish herberia for the woody plants of Arkansas and the vascular plants of Faulkner County.

Biological Control Of Heliothis In Sorghum, P J. Michael

Journal of the Department of Agriculture, Western Australia, Series 4

This research looks at Biological control of Heiiothis in sorghum, a preliminary report.

Karyology And Sex In Clematis Ligusticifolia Nutt. (Ranunculaceae), Darrel A. White

All Master's Theses

An investigation was conducted to determine the relationship between sex and karyology in Clematis ligusticifolia Nutt. (Ranunculaceae), a dioecious perennial.

Chromosome number and karyology of this species are discussed and a review of some of the major works of previous investigators of sex determinism in dioecious angiosperms is included.

A Taxonomic Study Of The Balsamorhiza Hookeri Nutt. Balsamorhiza Hirsuta Nutt. Complex, Mary Clay Muller

All Master's Theses

In this study a multivariate statistical analysis utilizes the linear discriminant function that has been used to substantiate the shift of the variety lagocephala (Sharp) Cronq., from Balsamorhiza hirsuta, to B. hookeri (Cronquist, 1955). This method can be used to determine the placement of other questionable taxa.

In addition, this paper deals with the history, morphology and distribution of B. hirsuta, B. hookeri var. hookeri, and B. hookeri var. lagocephala.

Ovulation, Fertility And Prenatal Mortality In Heifers Treated With Pmsg Or Porcine Fsh, D. B. Laster

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Ovulation rate, fertilization rate and prenatal mortality were studied in yearling beef heifers treated with PMSG or FSH and in non-treated controls. Oestrus was synchronized in 50% of the animals in each treatment with an oral progestagen. The gonadotrophin injections were given during the normal oestrous cycle or during the progestagen-administration period. All heifers were inseminated 6 to 10 hr after observation of standing oestrus.

Ovulation rate and percentage fertility were determined in approximately a third of the animals in each treatment group. The reproductive tracts of the remaining animals were examined 81 to 104 days after insemination for number …

The Effect Of The Herbicide Glyphosate On The Growth Of Selenastrum Capricornutum, Judith Susan Eisen

Undergraduate Honors Capstone Projects

The herbicide glyphosate (MON-0139), an isopropylamine salt of N- (phosphonemethyl)glycine, was tested to determine its effects on the growth of the fresh water green alga Selenastrum capricornutum. Experiments were carried out to determine algicidal, algistatic, and inhibitory concentrations of the compound.

Concentrations from 5 ppm to 1000 ppm were inhibitory to the growth of the alga, but the effects were algistatic, rather than algicidal. At concentrations from 0.1 ppm to 1.0 ppm the growth of the alga was stimulated by the presence of the herbicide, while at concentrations from 0.001 ppm to 0.05 ppm the effects of the herbicide were …

Tissue Culture Of Camptotheca Acuminata Decaisne (Nyssaceae), Ron Charles Cooke

University of the Pacific Theses and Dissertations

Camptotheca acuminata Decaisne (Nyssaceae) is endemic to China. The plant was brought to the United States only on a few occasions and thus can be considered rare in this country. A search of the plant kingdom for species that produced anticancer substances revealed that ethanolic extracts of Camptotheca acuminata had such a property. The active constituent was identified eventually. Further testing and possible marketing of the active principle, and alkaloid, (camptothecin) depended on a combination of factors: obtaining the plant from China, organization of a mass planting program in the United States or chemical synthesis of the drug.

Due to …

Photosynthesis And Respiration Of Arceuthobium Tsugense, James Roger Miller

Dissertations and Theses

Dark respiration rates of the aerial shoots of Arceuthobium tsugense, obtained by manometric and IRGA techniques, show production of C0₂to range between 155-300 µl CO₂ g^-1h^-1 with evidence of seasonal variation. Experiments with ¹⁴C0₂ indicate that the aerial shoots are capable of some photosynthetic CO₂ fixation, with 10-15% of the available ¹⁴C incorporated by the plant tissue in one hour.The portions of the o aerial shoots which are most active in C0₂ fixation are the young terminal regions. Biochemical characterization of the products of photosynthesis reveals that 80-90% of …

The Effect Of Insect Damage On Indian Ricegrass (Oryzopsis Hymenoides) In Western Utah, Luis S. Guerra

Theses and Dissertations

Indian ricegrass at the Desert Range Experiment Station forty-seven miles west of Milford, Utah, is damaged by the larvae of Coenchroa illibella, Diatrae sp. and Typoceris ceraticornis, the latter being the most destructive. The biology of the insects and the extent of damage inflicted are discussed. Uninfested plants produced more new stems than infested plants. Plants having a basal diameter of 4 to 6.9 cm and 7 to 9.9 cm were the most frequently infested and, consequently, the most severely damaged.

The Prairie Naturalist Volume 4, Nos. 3 And 4. September–December 1972

The Prairie Naturalist

THE SANDHILL CRANE WITH EMPHASIS ON ASPECTS

RELATED TO NORTH DAKOTA ▪ Douglas H. Johnson and Robert E. Stewart

SIZE AND COLORATION CHARACTERISTICS OF NEOTENIC SALAMANDERS IN DEVILS LAKE, N. D. ▪ Douglas W. Larson

BIRDS' EGGS: AN AID TO NATURE APPRECIATION ▪ S. O. Kolstoe

BIRD MORTALITY AT FOUR TOWERS IN EASTERN NORTH DAKOTA — FALL 1972 ▪ Michael Avery and Tom Clement

POPULATION IRRUPTION OF THE LEAST WEASEL (Mustela nivalis) IN EAST CENTRAL NORTH DAKOTA ▪ John T. Lokemoen and Kenneth F. Higgins

Effect Of Coumarin And Related Compounds On Blister Beetle Feeding In Sweetclover, Herman J. Gorz, Francis A. Haskins, G. R. Manglitz

Department of Agronomy and Horticulture: Faculty Publications

The ashgray blister beetle, Epicauta fabricii (LeConte); the striped blister beetle, E. vittala (F.) ; and the margined blister beetle, E. pestifera Werner collected in the field from plants of sweetclover low in coumarin content, fed preferentially in the Iaboratory on low-coumarin leaves when offered a choice between leaves from highand low-coumarin plants. The black blister beetle, E. pennsylvanica (De Geer) , not known to feed 011 sweetclover foliage, also fed preferentially in the laboratory on leaves from low-coumarin plants, although the rate of feeding was much slower than for the other species. By using appropriate genotypes of sweetclover and …

Winter Wheat Cultivar Performance In An International Array Of Environments, J. E. Stroike, V. A. Johnson

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The International Winter Wheat Performance Nursery organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Agricultural Research Service, U.S. Department of Agriculture, under a contract with the Agency for International Development, U.S. Department of State, has presented a unique opportunity to measure the performance and stability of 28 winter wheat cultivars over an international array of environments. Computations of three parameters for yield, selected agronomic traits, and grain protein and lysine were made from nursery data recorded in 1969 and 1970.

Front Matter, Vol. 17 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Fleas Of Venezuela, Vernon J. Tipton, Carlos E. Machado-Allison

Brigham Young University Science Bulletin, Biological Series

Forty-three species of fleas were collected in Venezuela by personnel of the Smithsonian Venezuelan Project. Currently there are fifty-two species of fleas known from Venezuela. Four new taxa are described: Hormopsylla cryptica, Ctenidiosomus perplexus, Adoratopsylla antiquorum rara and Adoratopsylla antiquorum recta. The females of Adoratopsylla antiquorum discreta Jordan and Rothschildopsylla noctilionis (Costa Lima) are described. The families Stephanocircidae (Cleopsylla, Craneopsylla, Plocopsylla, Sphinctopsylla) and Pygiopsyllidae (Ctenidiosomus) are reported from Venezuela for the first time. Two male specimens of the genus Orchopeas constitute the first record of this genus in South America and records of species of the …

End Matter, Vol. 17 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Labidocarpid Bat-Mites Of Venezuela (Listrophoroidea: Labidocarpidae), Burruss Mcdaniel

Brigham Young University Science Bulletin, Biological Series

Nine species of bat-mites representing six genera of the family Labidocarpidae are recorded from Venezuela. The genus Pseudoalabidocarpus is described as new and contains a single species, P. secus, new species, collected from Phyllostomus elongatus and P. discolor. Two other new species are described: Lawrenceocarpus phyllostomus, new species, collected from Phyllostomus elongatus and Micronycteris hirsuta; and Labidocarpus dossuarius, new species, collected from Molossus major. New distribution and host records from Venezuela include: Alabidocarpus furmani on Glossophaga longirostris, Carollia perspicillata, C. brevicauda, Vampyrops helleri, Anoura caudifera and Pteronotus parnellii; A. nicaraguae on Uroderma magnirostrum; A. jonesi on Vampyrops helleri; Parakosa tadarida …

Venezuelan Amblyopinini (Insecta: Coleoptera; Staphylinidae), C. E. Machado-Allison, Alfredo Barrera

Brigham Young University Science Bulletin, Biological Series

Eight species of the tribe Amblyopinini are known from Venezuela. The descriptions of five species (Amblyopinus proximus, A. intermedius and A. metasternalis plus Amblyopinodes major and A. venezolanus) are given in this paper. Megamblyopinus seeversi Machado-Allison and Barrera is placed in the genus Amblyopinus and A. bolivari Barrera, Machado-Allison and Muñiz is reduced to a subspecies of A. schmidti Seevers. Data on hosts and distribution are given for the new species as well as A. emarginatus Seevers and A. waterhousei Fauvel.

Contributions To The Study Of The Genus Eriastrum: Ii. Notes Concerning The Type Specimens And Descriptions Of The Species, H. Keith Harrison

Brigham Young University Science Bulletin, Biological Series

The species of the genus Eriastrum are described. Keys to the species and subspecies and the geographic ranges are provided. Discussions with regard to the type specimens or lectotypes and interspecific relationships are presented.

End Matter, Vol. 17 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 17 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Sucking Lice Of Venezuelan Rodents With Remarks On Related Species (Anoplura), Phyllis T. Johnson

Brigham Young University Science Bulletin, Biological Series

The paper includes discussions and descriptions of species of Anoplura known to occur on Venezuelan rodents, and of certain other taxa related to Venezuelan forms. Five genera are represented: Enderleinellus Fahrenholz—2 species: insularis Werneck and venezuelae Ferris; Hoplopleura Enderlein—19 species, 11 of them new: sciuricola Ferris; arizonensis Stojanovich and Pratt; aitkeni, new species; travassosi Werneck; abeli, new species; rimae, new species; angulata Ferris; indiscreta, new species; tiptoni, new species; handleyi, new species; eximia, new species; quadridentata (Neumann); contigua, new species; nesoryzomydis Ferris; oryzomydis Pratt and Lane; multilobata Werneck; splendida, new species; inusitata, new species; and orinocoi …

Mites Of The Family Laelapidae In Venezuela (Acarina: Laelapidae), Deane P. Furman

Brigham Young University Science Bulletin, Biological Series

This publication presents the results of an extensive survey of symbiotic laelapid mites of vertebrates from Venezuela. Over 40,000 vertebrates were examined from a wide variety of life zones and localities. The laelapid fauna represented includes 1 new genus, Hymenolaelpas, and 7 genera previously described: Laelaps, Mysolaelaps, Tur, Steptolaelaps, Neoparalaelaps, Gigantolaelaps, and Androlaelaps. The genera are represented by 51 species and subspecies, of which 8 are described as new. Previously unknown males and immatures of several species are described. Gigantolaelaps versteegi ( Oudemans ) is redescribed from type material; G. wolffsohni (Oudemans) is redescribed from Oudemans’ original material; G. peruviana …

Front Matter, Vol. 17 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 17 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 17 No. 6

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 17 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.