Life Sciences Commons^™

Cover Spraying For Septoria Leaf Spot Of Celery, S C. Chambers

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

LEAF SPOT, caused by the fungus Septoria apii Chester is the most serious disease of celery in Western Australia and is responsible for heavy losses in many winter grown crops.

Excellent control of Seproria leaf spot on winter grown celery has been obtained with the fungicide Dyrene (R) when applied at 10-11 day intervals during the season.

Citrus Water Spot, H L. Harvey

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

WATER SPOT is a disease condition which reduces the quality of citrus fruit in Western Australian orchards during continuous wet winter weather.

The problem is greatest in the Hills districts on navel oranges but mandarins may also be affected. Valencia oranges are rarely if ever affected.

Stem Rust Of Wheat, H L. Harvey

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

STEM RUST is one of the most serious diseases of wheat and is of world-wide importance.

Fortunately, widespread epidemics are rare in Western Australia because the general climatic conditions are usually unfavourable to the disease.

Nevertheless, localised outbreaks of stem rust are quite common on the Esperance Plains and around Geraldton where seasonal conditions are frequently mild and humid.

The 1963-64 Wheat Stem Rust Epidemic, J T. Reeves

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

Comments on the 1963 epidemic and the current situation regarding rust races and resistant varieties in Western Australia.

THE 1963-64 harvest included 12 million bushels of undergrade wheat, representing 25 per cent, of the total harvest.

The average yield was reduced to only 11.3 bushels per acre. Although these adverse effects were due to a number of causes, the principal one was stem rust.

The economic loss due to this disease in the 1963-64 harvest probably exceeded £10 million.

Inoculation And Lime-Pelleting Of Leguminous Seeds, W P. Cass Smith, Olga M. Goss

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

IN Western Australia extensive areas of new land are brought under cultivation each year.

Much of this virgin soil is only sparsely populated with the beneficial rhizobial bacteria which nodulate the roots of common pasture and forage legumes, such as subterranean clover, barrel medic, lucerne and field pea.

Rust Of Snapdragons, O M. Goss

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

RUST is possibly the most destructive disease attacking antirrhinums or snapdragons.

In Western Australia, the disease first appeared in 1955 and since that time has become very prevalent and widespread, frequently with devastating effects.

The Red-Legged Earth Mite And The Lucerne Flea [Replaced By Farmnote 67/86], Clee Francis Howard Jenkins

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

THE red-legged earth mite and the lucerne flea are the two most important pasture pests of Western Australia.

They commonly retard the establishment of new pastures by causing serious damage to pasture legume seedlings and in some seasons can damage cereal crops.

This article describes the pests and gives current recommended control measures.

Leaf Spot Diseases Of Strawberry, Department Of Agriculture, Western Australia

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

Leaf spot and leaf scorch are two important' fungal diseases of strawberry in Western Australia.

Satisfactory control can be obtained by good cultural methods and with captan or phaltan fungicides in a suitable spray programme.

Recommended Wheat Varieties, 1965 : State Wheat Advisory Committee Recommendations For Wheat Varieties For 1965 Plantings, Department Of Agriculture, Western Australia

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

State Wheat Advisory Committee recommendations for wheat varieties for 1965 plantings.

THE wheat rust epidemic of 1963 has directed attention to resistance of varieties to this disease, new races of which have recently appeared in Western Australia.

However, last year was one of abnormal seasonal conditions, with late summer rains followed by a mild winter, and spring conditions which favoured rust.

Take-All Disease Of Wheat, S C. Chambers

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

Take-all is the most serious of the several root-rotting diseases of wheat in Western Australia.

In the absence of cereal crops, the fungus responsible for take-all survives on the roots of native grasses.

Losses can be minimised by adopting cultural methods which reduce the amount of infective material in the soil and which also encourage vigorous growth of the crop.

A Revised List Of Diseases Of Ornamental Plants Recorded In Western Australia, O M. Goss

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

THIS list of ornamental diseases constitutes a revision of portion of the census published by Carne (1925) and added to by the same author in 1927.

It contains also records of diseases identified in the period between these earlier publications and June 30, 1961.

Guard Against Bitter Pit, Department Of Agriculture, Western Australia

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

Two seasons ago bitter pit' caused heavy rejections of apples for export overseas and bad trade publicity.

To avoid a repetition of this, precautions should be taken against bitter pit on all susceptible varieties.

Linseed Growing In The Ord River Valley, D F. Beech

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

Experimental work with linseed at the Kimberley Research Station began in 1952 and has been intensified in the last four years.

Fertiliser requirements and methods of land preparation, sowing, irrigation and weed control have been established.

Suitable varieties have been selected. Farm-scale crops have been grown in the area and, although cotton is very much more remunerative as an establishment crop, it is expected that linseed will ultimately have a place in the Ord irrigation scheme.

Flower Greening And Witches' Broom, Department Of Agriculture, Western Australia

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

THE flower "greening" and witches' broom diseases may be found in a variety of plants.

Susceptible garden species include phlox, gerberas, vincas, dahlias, geraniums, asters and many others.

Control Of Perennial Grasses, Department Of Agriculture, Western Australia

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

Perennial grasses such as paspalum, kikuyu and couch can be controlled by spraying with a solution containing 2,2-DPA.

This is a non-poisonous powder which is sold under a variety of trade names.

Supplementary List Of Disease Recorded On Various Hosts In Western Australia, G C. Macnish

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

THIS supplement contains the diseases recorded on all hosts during the period July 1, 1961 and June 30, 1963 inclusive.

A few disease records omitted from previous census have been incorporated. A list of previous publications in this series is appended. Also appended is a list of common names of host plants to facilitate reference.

The Control Of Bitter Pit In Apples, Frank Melville, S. E. Hardisty, N. S. Shorter

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

Bitter pit is a physiological disorder of apples which causes considerable wastage of otherwise sound fruit .

It is a problem of world-wide occurrence and in Western Australia growing conditions appear particularly favourable for its development.

In recent years a practical means of control by calcium sprays has been developed.

Identification Of The Free Amino Acids Of Nematode Resistant And Susceptible Soybeans, J. R. Young, Robert D. Riggs

Journal of the Arkansas Academy of Science

No abstract provided.

Daffodil Eelworm Diseases, O M. Goss

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

EELWORMS or nematodes are minute worm-like organisms, some of which cause plant diseases.

The plant parasitic forms are not visible to the naked eye but the damage resulting from their attack can be quite severe.

A Revised List Of Fruit Diseases Recorded In Western Australia, R F. Doepel

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

THIS list of fruit diseases is a revision of part of the census published by Carne (1925) and supplemented by the same author in 1927.

It also contains records of diseases identified in the period between these earlier publications and June 30, 1961.

Plant Pathologist Retires, Department Of Agriculture, Western Australia

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

The Chief of the Department of Agriculture's Biological Services Division, Mr. W. P. Cass Smith, retired from the Department on July 16 this year after many years of valuable service.

Take-All Of Wheat On The Esperance Downs : The Effect Of Multiple Cropping, S C. Chambers

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

A considerable increase in take-all occurred in the second crop of wheat following linseed, oats or vetches at the Esperance Downs Research Station.

THE take-all disease of wheat, caused by the fungus Ophiobolus graminis, has been responsible for many crop failures in the Esperance district during the past 15 years.

In an endeavour to find a practical solution to this problem, a crop rotation experiment was started in 1961 at the Esperance Downs Research Station.

Wheat Breeding And Variety Trials, 1963-64, J T. Reeves

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

A review of the wheat breeding and pedigree seed production by the Department of Agriculture.

Yields from the wheat variety trials at agricultural research stations during the 1963-64 season are presented and discussed.

Quantitative Differences In Alanine In Rice Panicles Of Varieties Resistant And Susceptible To Kernel Smut, J. G. Goodman, George E. Templeton

Journal of the Arkansas Academy of Science

No abstract provided.

Hyperparasitism, Michael G. Boosalis

Department of Plant Pathology: Faculty Publications

Much of the research on hyperparasitism has been of a descriptive nature, based primarily on studies with dual cultures in synthetic media. The main contributions from these investigations concern the host range of the parasite, the mode of penetration and infection, and the morphological changes of the host and the parasite resulting from parasitism.

More recent studies on hyperparasitism emphasize the effect of environmental factors, especially nutrition, on the susceptibility of the host. Research on the physiology of hyperparasitism has been limited. Nevertheless, this important aspect of the problem should continue to receive increased attention as hyperparasitism is extremely amenable …

A Study Of Puccinia Graminis And Cronartium Ribicola, Duane W. Hughes

Graduate Student Research Papers

It was the purpose of this study (1) to review the literary history of rusts in the United States and in the Northwest in particular, ( 2) to learn where rusts generally are found geographically, (3) to gain further information regarding the etiology of wheat rust (Puccinia graminis tritici), of white pine blister rust (Cronartium ribicola) and to become enlightened on other rusts, (4) to learn ways of controlling the two rusts, black stem rust of wheat and white pine blister rust, and to gain an appreciation of the economic importance of rust prevention.

Studies On Flagging And Root And Butt Rot Of Subalpine Fir, Abies Lasiocarpa (Hook.) Nutt., David Lavar Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Subalpine fir, Abies lasiocarpa (Hook.) Nutt., is a common climax dominant of the extensive spruce-fir forests of the subalpine zone of the Rocky Mountains from the southern Yukon Territory to the high mountains of New Mexico and Arizona (Society of American Foresters, 1954).

Studies And Observations On Potato Powdery Mildew, Brent C. Palmer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the past several years, powdery mildew disease has become an increasingly important problem to potato growers in the northern part of Utah. In some fields, reduction in yield due to powdery mildew has been estimated to be as high as 30 percent (Treshow and Cannon, 1961). The disease has been reported from many parts of the world. Other than in Utah, however, the only place where it has been considered to be of economic importance is Palestine. In that country, reduction in yield has been estimated to be as high as 20 percent (Palti and Moeller, 1946).

Infrared Spectroscopy As Applied To The Study Of Biochemical Changes Induced By Tobacco Mosaic Virus In Leaf Cells, Banavara Krishnappa Chandrasekhar

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The biochemical reactions occurring during the early stages in the infection cycle of a plant virus are still unknown. Many studies involving bacteriophage and animal viruses that have been made in recent years have provided evidence of the nature of virus infection, but these have not been of much value in understanding the nature of plant viruses. Infrared spectroscopy applied to the study of viral infection processes by Chochran and his co-workers (1960, 1962) have given some clues about the nature of biochemical changes taking place in the leaf tissues as a result of infection with cucumber mosaic virus and …

Pasmo Of Linseed And Flax, S C. Chambers

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

Pasmo is a foliage disease which may cause severe damage to plantings of linseed and flax approaching maturity.

The disease is favoured by warm humid conditions and is especially destructive when crops have lodged extensively as a result of storms.