Horticulture Commons^™

Grease Spot Of Passion Fruit, R F. Doepel

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

PROLONGED wet periods during the winter months favour serious development of the bacterial disease grease spot in passion vine plantations.

Apple Dieback In Western Australia, Frank Melville

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

Dieback of apple trees has been a serious and persistent problem in Western Australian orchards for many years.

Field observations and trials suggest that it can be greatly reduced or avoided by spray thinning to control cropping, summer irrigation, light pruning, and avoidance of root damage by cultivation.

Sugar Beet Eelworm (Heterodera Schachtii Schmidt) On Cauliflowers And Its Control, O M. Goss

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

SUGAR beet eelworm causes severe damage to summer-grown cauliflowers in some areas in Western Australia, particularly those areas of Spearwood, Balcatta and Osborne Park which border the swamps.

Plant Diseases : Leaf Spot Of Celery, Department Of Agriculture, Western Australia

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

LEAF SPOT is the most serious disease of celery in Western Australia, and causes heavy losses in many crops during the cold wet months of June, July and August.

The disease is incited by the fungus Septoria apii Chester, and was first recorded in this State at Osborne Park in 1923.

Since then it has become a limiting factor in the production of marketable celery during the winter months.

Root Knot Eelworm And Its Control, O M. Goss

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

ROOT galling caused by root knot eelworm attack is very common in the lighter sandy soils of Western Australia.

This parasitic worm causes severe unthriftiness which may even result in the death of the plant, particularly during the summer months when the disease is most damaging.

Root knot eelworm has a wide host range.

Peach Leaf Curl, Department Of Agriculture, Western Australia

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

PEACH LEAF CURL is a common disease in Western Australia during the spring and early summer.

Vegetable Seed Treatments, G C. Macnish

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

Many common vegetable diseases can be carried over from one crop to the next by means of contaminated seed.

The use of such seed also results in contamination of the soil with the disease-causing organisms.

Prevention or control of seed-bome diseases can be achieved by the use of appropriate chemical or hot water treatments.

Blossom-End Rot Of Tomatoes, G C. Macnish

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

Complete control of this common physiological disorder of tomatoes cannot as yet be achieved, but a number of measures can be employed to reduce its incidence.

DURING the summer months many tomato specimens are received showing symptoms of blossom-end rot.

Many growers attribute this trouble to parasitic organisms and are anxious to prevent it spreading to the rest of their crop.

However as blossom-end rot is not a parasitic disease, it cannot be controlled by fungicidal or bactericidal sprays.

Brown Spot Of Passion Fruit, R F. Doepel

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

Brown Spot is a serious fungal disease of passion fruit in this State.

Successful crop production is dependent on adequate disease control in the plantation.

BROWN SPOT is found in plantings throughout Western Australia. Severe outbreaks of the disease have occurred in most districts, including Serpentine, Manjimup, Nannup and Denmark.

Although isolated young plantings may remain healthy for two or three years, the disease eventually becomes established in the vines.

Black Spot Of Roses, G C. Macnish

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

ROSES are among the most popular and versatile ornamentals as they may be grown as climbers, bushes or standards.

Black Spot of roses can be prevented by combining good sanitary practices with the regular use of preventative fungicides such as maneb and folpet.

Mosaic Diseases Of Beans, H L. Harvey

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

TWO important diseases of beans in W.A. are common mosaic and yellow mosaic.

Both may cause malformation, stunting of growth and yield reductions and are most serious in the spring and early summer crops.

Plant Diseases : Angular Leaf Spot Of Cucurbits, O M. Goss

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

ANGULAR leaf spot caused by the bactterium Pseudomonas lachrymans (E.F.Sm. & Bryan) Carsner, is common on cucumbers and gherkins grown late in the season.

The same disease has been recorded on rockmelons, watermelons and pumpkins but rarely occurs on these hosts in Western Australia.

Septoria Leaf Spot Of Tomatoes, S C. Chambers

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

SEPTORIA leaf spot was first observed on tomatoes in Western Australia in 1925.

Since then it has caused serious losses, both from seedling blight and defoliation of larger plants, on many occasions in autumn and spring crops.

Sclerotinia Disease Of Vegetables : Survival Of The Fungus In Soil, S C. Chambers, M. Hardie

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

Sclerotinia of vegetables is carried over in the soil of market gardens by means of resting fungal bodies called sclerotia.

Recent tests have shown that sclerotia may stay alive in the sandy soils of Spearwood for two years, but disappear from the wet peat soils of Wanneroo within six months

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.

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.

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.

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.

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.

Rust Of Stone Fruit : Results Of Some Recent Spray Trials, R F. Doepel, S. E. Hardisty

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

RUST is caused by the fungus Tranzchelia discolor which attacks almonds, nectarines, peaches and, less commonly, apricots and plums in Western Australia.

Rust disease occurs in stone fruit orchards throughout the State and in some seasons causes premature leaf fall.

In unsprayed canning peach orchards growers have suffered considerable losses as a result of infected fruit being rejected for processing.

In recent spray trials satisfactory control has been achieved with the fungicides Delan, thiram and zineb.

Plant Diseases : Sclerotinia Disease In Vegetables : Control With Allisan Fungicide : A Progress Report, S C. Chambers, M. Hardie

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

During the past decade sclerotinia rot has become a major disease problem in metropolitan market gardens.

The fungicide Allisan has given promising results as a cover spray for the control of Sclerotinia. Two applications of the material reduced the incidence of Sclerotinia in runner beans from 45 per cent, to 15 per cent, and in lettuce from 9 per cent, to 2 per cent.

Plant Diseases : Bacterial Gall Of Oleander, G C. Macnish

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

OLEANDER is an attractive evergreen shrub which will grow in all but the coldest districts of Western Australia.

Unfortunately it is affected by a bacterial disease which causes unsightly malformation or galling of all above ground parts.

The organism causing this disease is the bacterium Pseudomonas tonelliana Ferraris.

Black Leg Of Cabbage And Related Plants, G C. Macnish

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

BLACK LEG is a disease which attacks many kinds of cruciferous plants.Under certain conditions it can cause serious damage.

In Western Australia it has been recorded on cabbages, cauliflowers and kales.

The dry rot form damages swedes.

Crinkle Of Plums And Wind-Suck Of Grapes, Department Of Agriculture, Western Australia

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

No abstract provided.

Bactericidal Sprays For Tomato Bacterial Canker, O M. Goss

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

BACTERIAL CANKER of tomatoes causes its greatest damage in crops grown in the spring and autumn months in Western Australia. It is particularly damaging when the weather is unusually stormy and cool.

Bactericidal sprays applied immediately after pruning or after severe storms should reduce the spread of tomato bacterial canker—report of an experiment.

Spraying Guide For Control Of Pests And Diseases Of Fruit Trees, Department Of Agriculture, Western Australia

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

THE guide for spraying fruit trees has been prepared as a ready reference for fruit growers and as a reminder of control measures needed to deal with orchard pests and diseases.

The charts have been kept as brief as possible consistent with supplying details of recommended materials, concentrations and time of application.

Growers should consult Department of Agriculture leaflets or departmental officers for more detailed information.

Fig Mosaic, H L. Harvey

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

While fig production on a commercial scale is very limited in Western Australia, there is a wide distribution of trees grown singly or in small groups in orchards, farms and home gardens.

One disease that is widespread and sometimes causes concern to growers is fig mosaic.

Control Of Copper, Zinc And Manganese Deficiencies In Fruit Trees, N J. Halse

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

THE three elements copper, zinc and manganese are plant nutrients of the type often referred to as minor or trace elements.

Although essential elements for plant growth, they are required in comparatively small quantities.