Plant Pathology Commons^™

Northern Corn Leaf Blight (Helminthosporium Turcicum Pass.) On Susceptible And Resistant Corn, Saffet Baydar

Open Access Master's Theses (through 2010)

The objectives of the research reported herein were to (1) become familiar with the technique of inoculating corn with Helminthosporium turcicum, (2) become familiar with a technique of evaluating the susceptibility of corn lines to H. turcicum, (3) become familiar with plant reaction and organism development in the various types of corn and (4) evaluate Turkish corn susceptibility in relation to various types of germ plasm in American corn lines in order to assist in combating the serious disease of Northern corn left blight in Turkey.

Comparative reactions of 10 Turkish, 5 multigenic resistant, 2 heterozygous monogenic …

The History, Characteristics And Potential Of Kondinin Rose Clover, E T. Bailey, N. B. Gayfer

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

Experimental and field performances of rose clover over fen years suggest that it will be increasingly used as a pasture legume in south-western Australia.

A number of lines differing in maturity and leaf markings have been selected locally and given cultivar (variety) names

The first of these lines to be selected was designated Kondinin. This paper describes its origin, history, characteristics and performance.

Diseases Of Clovers In Western Australia, W A. Shipton

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

LEGUMES of the Trifolium species are grown widely in the State, and occupy an important place in our Agriculture.

There are a number of parasitic diseases of clovers, yet none have gained major economic importance.

The Effect Of Straw On The Emergence Of Wheat Seedlings, W A. Shipton, W. R. Tweedie

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

The emergence of wheat seedlings was decreased substantially when seed was planted close to oaten straw.

When the grain was placed a 1/4 inch above a straw layer emergence was depressed by more than half.

Cereal Root Eelworm, O M. Goss

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

CEREAL ROOT EELWORM* has recently been recorded from the older farming districts of Western Australia.

This eelworm can attack most cereals and grasses but is more damaging to wheat and oats.

Inoculation And Pelleting Of Lupin And Serradella Seed, W A. Shipton, C. A. Parker

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

LUPINS AND SERRADELLA are not as extensively grown in Western Australia as some other legumes, but they are useful pasture species, particularly on poorer sandy soils.

Virgin soils may contain rhizobial bacteria capable of nodulating some members of the lupin group, but none of these bacteria have been found to nodulate serradella (Lange, 1961).

The use of inoculated seed is imperative except where lupins have been grown before.

Net Blotch Of Barley, W A. Shipton

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

NET BLOTCH is the most prevalent disease of barley in Western Australia, and is capable of reducing yields considerably.

It is caused by the fungus Pyrenophora teres Drechsl.

Septoria Leaf Spot And Glume Blotch Of Wheat, W A. Shipton

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

SEPTORIA leaf spot and glume blotch of wheat occur throughout Australia and are capable of reducing crop yields.

While no estimates of yield losses are yet available in Western Australia both diseases can cause serious damage to crops.

Black Spot Of Peas, Department Of Agriculture, Western Australia

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

THIS fungous disease of peas causes "black spot" and "stem rot" on affected plants. During the wet winter months the disease is often so severe that it is difficult to grow garden pea varieties satisfactorily; but in summer when hot, dry conditions usually prevail the disease is of little consequence.

Summer And Autumn Rainfall In Relation To Epidemics Of Wheat Stem Rust In Western Australia, W A. Shipton

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

High summer and autumn rainfalls, followed by rust infection of volunteer plants and favourable conditions during late winter and spring, lead to rust epidemics.

WIDESPREAD outbreaks of wheat stem rust are rare in Western Australia.

The 1965 Ord River Cotton Crop, G D. Oliver, A. W. Hogstrom

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

THE financial results of 18 cotton growers in the Ord River Valley during the 1965 season were obtained during a survey conducted in August, 1965.

All farmers who have been allocated blocks and who grew cotton in 1965 were included in the survey.*

Nodulation Of Legumes On New Light Land. 1. Survival Of Rhizobia On Inoculated Pelleted Seed Held For Varying Periods Before Sowing Into Dry Soil, O M. Goss, W. A. Shipton

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

MOST of the light land areas being opened up in Western Australia are very sparsely populated with the rhizobial bacteria so essential for successful legume establishment.

Seed inoculation is therefore a necessity.

Farmers often have to resort to dry sowing because of the large acreages being planted or late opening rains.

Nodulation Of Legumes On New Light Land. 4. Rhizobial Strains For Pasture Establishment, O M. Goss, W. A. Shipton

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

LEGUMES are the basis of improved pastures in Western Australia.

Successful establishment of these legumes depends on the presence in the soil of suitable bacteria which will invade the roots and develop nodules in which nitrogen fixation is carried out. The nitrogen compounds produced are utilised by the plants, making them independent of soil nitrogen.

At the end of the season, the decomposition of the plant residues improves soil fertility.

Nodulation Of Legumes On New Light Land. 2. Protection Of Rhizobia From The Toxic Action Of Superphosphate And Trace Elements, O M. Goss, W. A. Shipton

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

VAST areas of new light land being developed in Western Australia are deficient in trace elements such as copper, zinc and molybdenum as well as in phosphorus.

These fertilisers are known to be damaging to the rhizobial bacteria inoculated on the seed unless they are protected by lime pelleting.

Nodulation Of Legumes On New Light Land. 3. The Effect Of Rogor Seed Treatment On Legume Nodulation, O M. Goss, W. A. Shipton

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

SEED treatment with systemic insecticides is widely used for the control of insect pests. However, when seed inoculation is necessary for pasture establishment, seed treatment with insecticide is not advisable.

A field experiment conducted at Badgingarra Research Station in 1964 showed that the systemic insecticide Rogor was very damaging to the applied rhizobia even when the treated seed was held for a month before inoculation.

Damage Caused By Hormone-Like Herbicides, G R W Meadly

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

THE discovery of the selective action of herbicides such as 2,4-D and MCPA resulted in a rapid expansion in the use of these chemicals for agricultural purposes, particularly for the control of weeds in cereal crops.

Plant Nutrition In Western Australia, George Henry Burvill

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

PLANT nutrition is of great practical importance in Western Australia.

Without a well developed fertiliser industry and research and experiments to guide farmers in appropriate fertiliser use the State's agriculture would be very restricted.

Take-All Of Wheat On The Esperance Downs : The Ffect Of Nitrogenous Fertiliser, S C. Chambers

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

The number of wheat tillers affected by take-all was not influenced by the application of ammonium sulphate in an experiment at Esperance Downs Research Station.

However, its use stimulated tillering and increased yields by an estimated 7.4 bushels an acre.

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.

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.

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.

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.

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.

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.

Recommended Wheat Varieties : 1964, Department Of Agriculture, Western Australia

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

THE State Wheat Advisory Committee has issued its official list of recommended wheat varieties for 1964.

Foliage Diseases Of Lucerne, S C. Chambers

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

Lucerne is subject to several foliage diseases in Western Australia, the more important being common leaf spot, rust and downy mildew.

These fungal diseases are all favoured by humid conditions and are especially prevalent in lucerne stands growing under irrigation.