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Poison Plants In The Garden, T E H Aplin

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

SOME 18 commonly grown garden plants are known to be toxic and many local home gardens have five or six of them.

Several other species can cause skin ailments.

The Recent Story Of Skeleton Weed : A Menace To Our Wheat Industry, G R W Meadly

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

SKELETON WEED was first found in Western Australia at Ballidu in 1963.

No further recording was made until December of last year when a small area was located near Esperance, but, within a brief period, plants were reported from Geraldton and Kwinana.

Trees Of Western Australia, Charles Austin Gardner

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

It is not desirable to give locality names to plants unless their range is fully underwood.

Such names can be very misleading.

Thr following is an illistrated discussion of the identification of five Western Australian trees.

Organo-Phosphorus Insecticides For Control Of Red-Legged Earth Mite And Lucerne Flea, J A. Button

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

MOUNTING CONCERN over residue problems arising from the use of D.D.T. and other chlorinated hydrocarbon insecticides on pasture has highlighted the need for alternative chemicals capable of providing satisfactory control without undesirable side effects.

Continuous Grazing On Rose Clover At Northampton, R J. Parkin

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

BECAUSE of its upright growth habit, it is often thought that rose clover may require some form of specialised grazing management.

It has also been said that the sheep find the plant and in particular the seed head, undesirable in the dry stages.

However, more recent observations refute this (Bailey 1966). The present commonly-grown strains of rose clover are later flowering generally than the medics or Geraldton subterranean clover and stay green later in the season.

Citrus Red Scale Control, G D. Rimes

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

THE RED SCALE (Aonidiella aurantii Masc.) is widely distributed throughout the world and is a serious pest in countries with semi-arid climates such as California, South Africa, Palestine and Australia.

The home of the pest is probably China, but it has been known in Australia for over 70 years and it was introduced into North America from the continent.

Stoneville Horticultural Research Station : Ten Years Of Progress, Frank Melville

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

THE Stoneville Research Station is a tree fruit station situated in the Darling Ranges 25 miles north east of Perth.

Climatically it is similar to the Hills fruit districts adjacent to Perth and is suitable for the growing of apples, pears and most stone fruits.

Citrus fruits can also be grown moderately well.

Strains Of Stem And Leaf Rust On Wheat In Western Australia Since 1951, I A. Watson, W. P. Cass Smith, W. A. Shipton

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

THE most important wheat rust in Western Australia is stem rust,

Leaf rust occurs infrequently and has not been known to cause serious damage.

Pasture Seed Production, 1966 : Statistics And Comments, B J. Quinlivan

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

THE marketing of pasture seeds differs from that of some other primary products in that there are no guaranteed prices.

A knowledge of potential supply and demand for the various species and strains is just as important to the seed producer as good production techniques.

Stop-Drop Sprays For Jonathan And Delicious Apples, N H. Shorter, J. Cripps

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

STOP-DROP sprays prevent excessive pre-harvest drop of Jonathan and Delicious apples.

Recent research has thrown more light on the best methods of employing these materials.

TWO CHEMICALS used as "stop-drop" sprays are available commercially in Western Australia. One of these, alpha napthalene acetic acid (NAA), is also well known as a thinning spray for apples.

Linuron : A New Herbicide For Cereal Crops, Geoffrey A. Pearce

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

DURING two years of trials on both pastures and cereals Linuron has proved itself to be a valuable addition to the range of chemicals for the control of weeds in cereals.

It has a good crop tolerance safety factor and controls a wider range of weeds than most other herbicides.

Influence Of Fire On Aspen, K. W. Horton, E. J. Hopkins

Aspen Bibliography

No abstract provided.

Review Of Silvicultural Research: White Spruce And Trembling Aspen Cover Types, Mixedwood Forest Section, Boreal Forest Region, Alberta-Saskatchewan-Manitoba, J. M. Jarvis, G. A. Steneker, R. M. Waldron, J. C. Lees

Aspen Bibliography

The Department of Forestry has been carrying on silvicultural research in the white spruce (Picea glauca (Moench) Voss) and trembling aspen (Populus tremuloides Michx.) cover types in the Mixedwood Forest Section of Alberta, Saskatchewan and Manitoba for about 40 years. Because of the needs of industry most of this research has been focused on spruce, and only as small portion on aspen. Much of the research is concerned with basic problems and the findings in one area may be applied directly or with minor modification throughout the entire Mixedwood Forest Section. Only a minor part of the total …

Genetic And Biochemical Aspects Of O-Hydroxycinnamic Acid Synthesis In Melilotus Alba, Herman J. Gorz, Francis A. Haskins, A. Kleinhofs

Department of Agronomy and Horticulture: Faculty Publications

In sweetclover (Melilotus alba Desr.) the cis- and trans-isomers of o-hydroxycinnamic acid occur primarily as the respective, β-D-glucosides. Available evidence indicates that these glucosides are formed via the following pathway: phenylalanine (formed from shikimic acid) → trans-cinnamic acid → o-coumaric acid (trans-o-hydroxycinnamic acid) → o-coumaryl glucoside (trans-β-D-glucosyl-o-hydroxycinnamic acid) → coumarinyl glucoside (cis-β-D-glucosyl-o-hydroxycinnamic acid). In tissues that are disrupted, coumarinyl glucoside is rapidly hydrolyzed by the action of endogenous β-glucosidase to yield coumarinic acid, which lactonizes spontaneously to form coumarin. The cu …

Observations On Occurrence And Range Of Three Species Of Dentaria (Cruciferae) In The Ouachita Mountains, Aileen L. Mcwilliam

Journal of the Arkansas Academy of Science

No abstract provided.

The Labiatae Of Arkansas, James M. Lang

Journal of the Arkansas Academy of Science

No abstract provided.

Diurnal Distribution Of Phytoplankton From A Single Station At The Mouth Of The James River, Harold G. Marshall

Biological Sciences Faculty Publications

Eight sets of water samples were taken to a depth of 36 ft. during a 24-hr. period. A homogeneity was found in the vertical distribution of the total phytoplankton in samples from 7 of the 8 hydro-casts. Skeletonema costatum and Asterionella japonica were the most numerous phytoplankters in every sample, with the majority of their counts each exceeding 500, 000 cells per liter.

Summer Soil And Air Temperatures In Four Plant Communities, Paul W. Conrad

Theses and Dissertations

Temperature, one of the most influential factors controlling the growth and distribution of plants, was measured during a three month summer period within several stands of vegetation. The stands represented four distinct plant communities: sagebrush-grass, mountain brush, aspen, and conifer. Measurements were obtained by a sucrose inversion method which gave exponential average or effective mean temperature (eT) values. Registerants, small glass vials filled with a sucrose-buffer solution, were placed in the air 10 decimeters above the ground level and in the soil 1, 5, and 10 decimeters below the ground level. The sites were carefully described with respect to plant …

Plant Communities: Native Vegetation Of Nebraska, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

Thanks to our rapid increase in population ,and the largely indiscriminate spread of urban, industrial, and transport facilities, the time is not far distant when land-use capabilities must receive much more attention than they have enjoyed. Natural, that is pre-settlement, vegetation, integrating as it did the manifold factors of environment, is un-excelled as a guide to potential land use.

Mammal Populations And Their Effects On Red Elderberry In The Mud Creek Sheep Allotment, Stawberry Valley, Utah, Howard Duane Smith

Theses and Dissertations

The purpose of this study has been to determine : (1) the mammalian species present in the Mud Creek area; (2) the approximate population density of each trappable species; (3) the species responsible for the damage; (4) the stem density and frequency of Smbucus racemosa; and (5) the approximate extent of damage to the red elderberry stems.

Two New Species Of Leafblight Fungi On Kalmia Latifolia, F. A. Wolf, A. R. Cavaliere

Biology Faculty Publications

The evergreen shrub, Kalmia latifolia L., commonly known as mountain laurel, calico bush, or sheep-kill, grows widely on rocky, acid soils in the eastern United States. Whether growing in its natural habit or in cultivation, mountain laurel appears to be equally subject to attack by fungi. The following account characterizes and discusses two of these fungi. One of them has not been described previously and additional observations have been made regarding the developmental morphology of the other one.

Both pathogens are Pyrenomycetes, one a Physalospora and the other a Diaporthe. Each produces a leafblight disease. Tiny brown discolorations on young …

Front Matter, Vol. 7 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

A Comparative Population Study Of Small Vertebrates In The Uranium Areas Of The Upper Colorado River Basin Of Utah, Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

This paper constitutes a terminal report to the United States Atomic Energy Commission for contract AT(11-1)819. It provides not only a faunistic and floristic study of areas having a high and low surface radiation, but also includes a consideration of their general ecology. Major emphasis is placed on the variation of the external characteristics of the small vertebrates of these areas with a statistical analysis of those characters examined in the lizards. The study was conducted in southeastern Utah (Tanner 1963, see map) from October 1959 through 1964, and was conducted as a test of the variation effects of natural …

End Matter, Vol. 7 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Chlorophyll, Cartenoid And Protein Metabolism In Relation To Iron Chlorosis, Antaraguttu Subbayya Shetty

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Iron as an essential element has been known since 1843, when Gris proved its need for the growth and well being of plants. Since then, many investigations have been carried out on various aspects of iron nutrition, leading to the accumulation of a vast literature, a monument to the assiduity of the chemists and the biologists.

The Effect Of Fluoride On C14O2-Fixation And The Synthesis Of Organic Acids, Amino Acids, Protein And Carbohydrates, Chin-Fung Li

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many studies have been conducted on the effect of fluoride on plants, but the exact mechanisms by which fluoride causes damage is little understood. The following physiological and metabolic processes are known to be affected by fluoride: a decrease in chlorophyll (McNulty and Newman, 1961), a diminished rate of photosynthesis (Thomas and Hendricks, 1956; Bishop, et al., 1958), decreased plant growth (Bonner and Thimann, 1950), inhibition of ascorbic acid synthesis (Smith, 1952), variation in starch and total polysaccharides (Donald and Emerson, 1961), inhibition of glucose transport (Jiri, et al., 1962), inhibition of metabolism (Ordin and Skoe, 1963), effects …

A Revision Of The Eriogonum Deflexum Torr. Complex, James L. Reveal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study includes those annual species of Eriogonum which have glabrous cordate or obtusely based calyx-segments, and 5-lobed involucres which are deflexed or erect on rather stout peduncles. With the possible exception of a few peripheral taxa, these species are believed to constitute a natural assemblage.

Radiosensitivity And Cytogenetic Studies On An Interspecific Grass Hybrid, Paul James Bottino

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The complex response of plants to ionizing radiation has never been clearly understood. One of the main problems is the differential sensitivity of plants to radiation. A clear understanding of differential sensitivity lies far in the future. For the present a major question is: can we predict the radiosensitivity of a plant before radiation exposure? Some progress has been made in answering this question. Sparrow et al. (29) feel that they have a useful statistic which can be used to predict the approximate radiosensitivity of a plant. Average interphase chromosome volume has been tested on sixteen species of herbaceous plants …

Host-Parasite Relationships Between Prunus Mahaleb And The Parasitic Nematodes Pratylenchus Neglectus And Meloidogyne Hapla, Bernard Al Tait

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah orchardists have encountered problems which they have needed to control for continued successful and economical fruit production. Some of these problems are diseases such as western-X virus, cytospora canker (Wadley, 1955) and codling moth (Davis, 1957). These diseases, because of their nature and severity, have received more attention than others.

Effect Of Fluoride On Respiratory Enzymes In Soybean Leaves, Arthur Chiu-Eng Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There are many reports relating the effects of fluorides on plant respiration. Fluoride has been regarded as an inhibitor of respiration. Warburg et al. (1942) demonstrated that fluoride inhibited enolase activity, therefore, decreased the respiration rate of yeast. Miller (1958), found a similar inhibition of enolase from pea seed. Bonner (1948), Bonner and Wildman (1946), and Laties (1949) reported that the fluoride ion in culture solutions reduced the respiration rate in Avena Coleoptile, spinach leaves and barley roots. Since the inhibition was reversed by the addition of pyruvate, they concluded that the inhibition of respiration was due to the inactivation …