Life Sciences Commons^™

Rice Stem Borers At The Kimberley Research Station, L E. Koch

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

STEM boring caterpillars have severely damaged rice crops at the Kimberley Research Station, near Wyndham, and studies have been made on the biology, abundance, and control of these insects.

Lupinosis, H W. Bennetts

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

LUPINOSIS is a disease which has caused severe mortalities in West Australian sheep flocks in recent years, and one which—because of the important role which lupins are playing in light land development—must inevitably continue to be a matter of serious concern.

What's Wrong With That Plant?, Department Of Agriculture, Western Australia

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

EACH year several thousand inquiries are received from people who want to know "What's wrong with that plant?" The plants range from common fruit, vegeable and pasture plants to rare ornamentals.

In most cases, the inquiries can be answered satisfactorily by Departmental officers who specialise in the study of various plant troubles.

Sclerotinia Rot Of Beans, S C. Chambers, M. Hardie

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

INVESTIGATIONS over the past three years suggest trenching is the most important practice for controlling Sclerotinia rot in market gardens.

None of the remaining measures under test gave satisfactory control of the disease, although some reduced its incidence significantly.

Bitter Pit : A Progress Report On The Use Of Calcium Nitrate Sprays For Its Control, Frank Melville, S. E. Hardisty

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

FREEDOM from serious pests and diseases such as Black Spot and Codling Moth and relative immunity from storage rots has greatly simplified apple growing in Western Australia.

However, what has been gained in this respect is often countered by pre-harvest and post-harvest physiological troubles which are rather common to apple growing in this State.

Bacterial Wilt Of Potatoes, Department Of Agriculture, Western Australia

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

EACH season, Bacterial Wilt causes heavy losses to individual growers in several of the potato districts throughout the South-West of the State.

The disease is incited by the bacterium Pseudomonas solanacearum E.F.Sm. and is most prevalent in the districts of Donnvbrook. Pemberton and Manjimup as well as in the area between Waroona and Dardanup.

It is a tuber-borne disease which is extremely difficult to eradicate, once it has been introduced on to a property.

The Fruit Industry In Other Lands. 1. The United Kingdom, Frank Melville

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

THE following report deals with the many aspects of fruit growing both technical and commercial covered during a tour of three overseas countries undertaken on behalf of the Department of Agriculture and the fruitgrowers of Western Australia.

In the course of the three and a half months spent on this work, 13 research establishments were visited and contacts were made with research personnel both within these organisations and elsewhere.

Visits to commercial fruit growing areas were made with extension officers and these included brief visits to packing houses.

Altogether I had discussions with 127 research and extension personnel and industry …

Basidiomycetes Of The Mount Dellenbaugh Region Of Mohave County, Arizona, Robert Burke Mccomb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mount Dellenbaugh is located on the Shivwits Plateau bordering the north rim of the Grand Canyon in Mohave County, Arizona. The elevation of the plateau in the Mount Dellenbaugh area is approximately 6,000 feet. The dominant species comprising the flora of this region are: Pinus ponderosa, Pinus edulis, Juniperus ostiosperma, Quercus gambelli, and Artemisia tredentata.

Ec59-1822 Plant Diseases: Peony Blight, John L. Weihing

University of Nebraska-Lincoln Extension: Historical Materials

EC 59-1822 is about plant diseases and especially peony blight (also called Botrytis blight) and how to control it.

Use Of The Antibiotics, Streptomycin And Terramycin, As Growth Stimulants For Orchid Seedlings, Margaret W. O'Neill

Biology ETDs

Antibiotics first came to the public's attention in 1945, when penicillin and streptomycin were released by the United States government to fight human diseases. Later, other antibiotics were released and experimental work was done on control of plant and animal diseases. By 1948 plant pathologists found that certain plant diseases such as walnut blight, tomato and pepper bacterial spot, soft rot, cucumber, downy mildew, chrysanthemum bacterial wilt, and lilac bacterial blight could be controlled by antibiotics.

The Effect Of Certain Fluoride Sprays In The Production Of Soft Suture On Peaches, N. V. Narayanamoorthy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pollution of the atmosphere and its potential deleterious effects on health, industry, agriculture and natural resources are causing grave concern in many parts of the world. In the past century there has developed in the fields embraced by physical and biological sciences a considerable knowledge of theoretical and applied information, serving as a versatile tool in combating such problems. Air pollution problems seem to have gained much attention with the rapid development of various industries in major parts of the world. Rural and urban areas adjoining these industrial locales are confronted with the dangerous overall problems of air pollution. Evidently, …

Green Rot Of Apricot, Abdul Karim N. Alrayis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This disease, also called jacket rot of apricot, was first though to be similar to a disease caused by a fungus found in central California. The Utah disease was first noted in 1953, in the Henry Hall Chinese apricot orchard at North Ogden. It was not very severe in 1953, but in 1954 and 1955 it affected half of the crop. In 1956 the disease could not be found in the orchard. Infection occurred in young green fruit resulting in brown to black necrotic lesions which varied from 1/4 to 3/4 inches in diameter. Infected fruits usually dropped from the …

The Backcross Method In Breeding Tomatoes Resistant To Fusarium Wilt, Joseph L. Peterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many times the plant pathologist and plant breeder are confronted with a plant disease which requires the development of a resistant variety in a limited time. Any breeding program which requires selection from a large population during each segregating generation to insure the right genetic combination will, of course, lengthen the period which it will take to develop this resistant variety. The backcross method of plant breeding, in many cases, helps the plant pathologist and plant breeder develop resistant varieties containing characteristics similar to those of the desired parental type within a shorter period of time.

Red Raspberry Root Rot In Northern Utah, Robert L. Powelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the last few years, red raspberry growers in Utah have been finding that plantings gradually lose vigor and are not profitable. In the largest raspberry growing area in Utah, Utah County, figures taken from the U.S. census from 1930 to 1950, show a decrease in acres of raspberries grown from 401 in 1930 to 190 in 1950 (2). In many instances this deterioration of raspberry plantings in Utah has not been definitely associated with known plant pathogenic fungi or virus infections. Neither can the expansion of suburbs account for this decrease. In certain cases it has been obvious that …

Growth Of The Fungus, Verticillium Albo-Atrum In Resistant And Non-Resistant Strains Of A Tomato Variety And Its Effect On Plant Growth, Robert M. Zundel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Verticillium wilt, caused by the fungus, Verticillium albo-atrum, is a destructive disease of tomatoes in many areas. Due to the seriousness of this problem, Cannon and Waddoups (1) have developed resistance to this disease in some commercial varieties grown in Utah.

False Smut Of Buffalograss, John L. Weihing

Nebraska Agricultural Experiment Station: Historical Research Bulletins

False smut of buffalograss, Buchloe dactyloides (Nutt.) Engelm., caused by Cercospora seminalis Ell. & Ev. is a disease that destroys the unfertilized ovary. The disease was first reported by J. B. Ellis and B. M. Everhart in 1888. They gave only a brief description of the disease and named the causal fungus Cercospora seminalis. There are no etiological studies of false smut recorded in the literature. The origin of the term "false smut" is unknown to the author, but it so descriptively fits the general appearances of the disease that one readily understands its usage. The following studies were …

Streak Mosaic Of Wheat In Nebraska And Its Control, R. Staples, W. B. Allington

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This bulletin reports the results of studies on the epidemiology of wheat streak mosaic under Nebraska conditions. Particular attention is given to the occurrence and certain characteristics of the mite vector of the virus, the relation of weather and other factors to some of its activities, a correlation of certain mite situations with epidemics of the disease, and recommendations for disease control.

Spinach And Aphid Control By Ladybird Beetles, James E. Roberts

Journal of the Arkansas Academy of Science

No abstract provided.

Cowpea And Bean Weevils, W. D. Wylie

Journal of the Arkansas Academy of Science

No abstract provided.

Prussic Acid Poisoning In Common Vetch (Vicia Sativa) Seed, E. S. Ruby, J. Beasley, E. L. Stephenson

Journal of the Arkansas Academy of Science

No abstract provided.

Application Of Paper Electrochromatography To Isolation Of Tobacco Mosaic Virus, Bertram E. Bordewick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Importance of the problem

The complete study of a virus disease often reaches a stalemate because of failure to isolate the virus itself in a purified form. Methods in current use, such as ultracentrifugation, precipitation, fractionation, and spectroscopic analysis, have in some cases proved successful in virus purification work. Frequently these techniques have not proved satisfactory, particularly with phloem-type viruses which are not mechanically transmitted. This investigation was undertaken to determine the possibility of isolating these and other viruses by electrochromatography.

Nebraska Plant Disease 4-H Club Manual : Extension Circular 19-01-2, John L. Weihing

Nebraska 4-H Clubs: Historical Materials and Publications

This 4-H extension circular, EC 19-01-2, EC 19012, is used for the Nebraska Plant Disease Club manual. Members of the 4-H plant disease club will learn to recognize the usual signs or symptoms of several types of disease, to collect, preserve and classify disease samples and specimens, to exhibit these specimens at public events such as fairs and to demonstrate methods for control of plant disease.

Secretion Of Amylase By Rumex Virus Tumors In Vitro, L. G. Nickell, M. K. Brakke

Department of Plant Pathology: Faculty Publications

The secretion of extracellular enzymes by intact cells of higher plants apparently is a rare occurrence. One example of it is the secretion of an extra, cellular amylase by the tissue of a virus-induced tumor from the root of Rumex wetosa L. An amylase is secreted in sufficient quantities by this tissue to enable it to grow as well in vitro on a starch-containing medium as on one containing sucrose.

Nitrogen-Fixing Bacteria For The Inoculation Of Leguminous Seeds

Journal of the Department of Agriculture, Western Australia, Series 3

The Plant Pathology Branch of the Department of Agriculture can supply the cultures listed below. Owing to the time taken to prepare the cultures, however, and owing also to the fact that in the busy time of the year there is frequently a tremendous accumulation of orders, farmers are requested to lodge their applications together with the requisite payment at least a fortnight before they wish the culture to be forwarded.

The Testing Of Bacterial Strains Used In The Inoculation Of Legumes, Olga M. Goss

Journal of the Department of Agriculture, Western Australia, Series 3

A part from their value as fodder plants, legumes such as peas, beans, clovers, vetches and lucerne play an important role in increasing soil fertility. Their value in the soil-enriching sphere has been recognised for centuries, but it is only comparatively recently that the reason for it has been fully understood.

Brown Rot And Collar Rot Of Citrus, W P. Cass Smith

Journal of the Department of Agriculture, Western Australia, Series 3

Plant disease

Brown rot is a serious disease of citrus, which fortunately has proved to be readily controllable. It attacks both leaves and fruits causing partial or complete defoliation, and a rather characteristic fruit rot. The disease may also affect the bark of citrus trees in the basal trunk region resulting in "collar rot," or as it is sometimes called, brown rot gummosis. This phase of the disease will be referred to later.

Breeding Cereal Crops For The Control Of Disease, H. R. Rosen

Journal of the Arkansas Academy of Science

No abstract provided.

Virus Diseases Of Cereal Crops In South Dakota, J.T. Slykhuis

Agricultural Experiment Station Technical Bulletins (1939-2011)

Virus diseases of wheat, oats and barley have been reported from various parts of the world during the last three decades. In some instances viruses have proven be the real causes diseases formerly attributed to other agents. The earliest reports of a virus disease of wheat concerned a mosaicrosette disease first observed in southeastern Illinois in 1919. The disease caused by a soil-borne virus was later found in a number of localities in the eastern half of the United States, but to date it has not been reported west of the Missouri River. However, other mosaic disease of wheat have …

Lack Of Effect Of Plant Growth-Regulators On The Action Of Alpha-Amylase Secreted By Virus Tumor Tissue, M. K. Brakke, L. G. Nickell

Department of Plant Pathology: Faculty Publications

This report deals with the effect of certain synthetic plant growth-regulators on the activity of alpha-amylase (1) secreted by virus tumor tissue grown in vitro. Previous studies have lacked adequately controlled conditions and have been carried out with enzyme preparations obtained through the usual methods of destruction of cells. In this particular study (a) the assay employed to measure enzyme activity includes control of pH and temperature and (b) this enzyme, being secreted, is not subject to the drastic preparative procedures involving destruction of cellular structure usually necessary to obtain enzymes.

The Inheritance Of Resistance To Verticillium Wilt In Tomato, Lester Schaible

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Verticillium wilt of tomatoes is caused by Verticilium albo-atrum and is one of the most destructive diseases of tomatoes in Utah, California, Oregon, and Washington. Control methods thus far devised have proved to be either ineffective or too expensive.