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- Plant disease (3)
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Articles 1 - 14 of 14
Full-Text Articles in Biosecurity
Plant Disease - Black Spot (Anthracnose) Of Grapes, W P. Cass Smith, H L. Harvey, W R. Jamieson
Plant Disease - Black Spot (Anthracnose) Of Grapes, W P. Cass Smith, H L. Harvey, W R. Jamieson
Journal of the Department of Agriculture, Western Australia, Series 3
Black spot or Anthracnose of grapes caused by the fungus Elsinoe ampelina is a widespread and serious disease. In commercial vineyards it is often responsible for considerable reduction in yield and quality of fruit, and in home gardens also it may prove very damaging. Under commercial conditions the disease has proved difficult to control in seasons favourable for its development despite the routine application of accepted fungicides. Fortunately, preliminary results of recent spray trials indicate that greatly improved control is likely to result in future from the use of a number of new fungicides.
Bracken Fern Control, F E. Ryan
Bracken Fern Control, F E. Ryan
Journal of the Department of Agriculture, Western Australia, Series 3
Bracken fern occurs over a large proportion of the civilised world and is recognised in all countries as a serious pasture pest. Its control is a matter of great concern. In Western Australia large areas have been invaded by bracken, and recommendations for its control have been made from time to time. Generally speaking, control measures are aimed at the removal of the frond cover and stimulating pasture growth beneath.
Dingo Destruction 2—Some Hints On Shooting, A G. Moore
Dingo Destruction 2—Some Hints On Shooting, A G. Moore
Journal of the Department of Agriculture, Western Australia, Series 3
These articles have been written to assist professional and amateur doggers, as well as farmers, to destroy dingoes or wild dogs (the term "wild dogs" is generally used to include both dingoes and domestic dogs which are running wild). The information given has been gathered from extensive experience in most of the areas of the State to the south of the Transcontinental railway line.
Infectious Pneumonia Of Pigs, C R. Toop
Infectious Pneumonia Of Pigs, C R. Toop
Journal of the Department of Agriculture, Western Australia, Series 3
Infectious pneumonia is by far the most common disease of pigs in Western Australia and 1 is a source of serious loss to the pig industry. It has a wide distribution, and evidence of its existence in one form or another may be found in a large proportion of piggeries throughout the State. It is largely confined to young pigs and is most frequently observed in weaners and slips. For the most part it occurs as a chronic disease with symptoms of coughing, unthnftiness and retarded growth, but it may occasionally assume an acute form accompanied by serious mortality.
Crop Spraying With Hormone-Like Weedkillers, G R. W Meadly
Crop Spraying With Hormone-Like Weedkillers, G R. W Meadly
Journal of the Department of Agriculture, Western Australia, Series 3
Although a considerable amount of investigational work on various weeds was carried out during last season it is intended to devote this article to experience gained from large scale undertakings as distinct from experiments. A very successful aerial spraying project was undertaken against water hyacinth (Eichornia crassipes) at Lake Monger and pasture weeds such as thistles and Cape tulip (Homeria spp.) were treated with hormone-like preparations in a number of districts, but by far the greatest activity with these chemicals was associated with the selective control of weeds such as wild turnip (Brassica Tournefortii), wild radish (Raphanus raphanistrum) and mustard …
Plant Disease - Early Blight Or Target Spot Of Potatoes, W P. Cass Smith, M Hardie, B N. Lowe
Plant Disease - Early Blight Or Target Spot Of Potatoes, W P. Cass Smith, M Hardie, B N. Lowe
Journal of the Department of Agriculture, Western Australia, Series 3
Early blight or target spot caused by the fungus Alternaria solani is a widespread disease of potatoes which in Western Australia is most prevalent in crops dug in autumn and early summer. The disease may attack both foliage and tubers, but the tuber rot phase of the disease has hitherto caused most concern to local growers because it causes obvious losses in storage. The less obvious but more serious effects of the foliage blight have generally been overlooked, chiefly because the disease usually develops late in the season when the crops are approaching maturity. However recent spray trials with new …
Wild Dogs
Journal of the Department of Agriculture, Western Australia, Series 3
The Agricultural Protection Board has again pointed out that the time being spent by the Government doggers in hunting Individual wild dogs in farming areas was seriously hampering the more important work of destroying dogs by large-scale poisoning and trapping in their outback breeding areas.
Dingo And Wild Dog Destruction, A G. Moore
Dingo And Wild Dog Destruction, A G. Moore
Journal of the Department of Agriculture, Western Australia, Series 3
It has often been said that poison is the best means of destroying dingoes and wild dogs. Poison acts silently and does not have the frightening effect of trapping. When used properly—on a well-planned system and at the right times— poisoning has given excellent results in controlling the pests.
Worms In Sheep, C R. Toop
Worms In Sheep, C R. Toop
Journal of the Department of Agriculture, Western Australia, Series 3
The parasitic worms of sheep are widely distributed throughout Australia and are a source of serious loss to the sheep and wool industry. This results from the loss of condition which occurs in infested animals as well as from the failure of young sheep to thrive and make normal growth, and there is a consequent reduction both in carcase values and in the quantity and quality of wool produced. Furthermore, heavy infestations with worms are frequently responsible for serious mortalities.
Plant Disease - Corm Rots Of Gladioli, Olga M. Goss
Plant Disease - Corm Rots Of Gladioli, Olga M. Goss
Journal of the Department of Agriculture, Western Australia, Series 3
Several diseases of gladioli now present in Western Australia can be very damaging to the plants under certain conditions. The diseases referred to in this article attack not only the above-ground portions of the plant, but the corms also, and their introduction to new areas usually results from the planting of infected corms. When such corms are planted the disease spreads to the developing shoots and leads to inferior growth and flower production, and in some cases to the death of the plant. An even more serious feature of the disease is that the soil becomes contaminated with the organisms …
The Citrus White Fly, C F.H Jenkins, D G. Shedley
The Citrus White Fly, C F.H Jenkins, D G. Shedley
Journal of the Department of Agriculture, Western Australia, Series 3
For the first time in Western Australia the citrus white fly was recorded on lemon trees at Maddington in 1950 and since then it has been found to be widely distributed in the Maddington-Gosnells area and in scattered situations in the Darling Range, Middle Swan and Perth suburbs. It is also of interest to note that the insect appeared in Mildura citrus orchards in Victoria (Anon 1952), about the same time as it was reported from Western Australia, although there appears to be no explanation for its sudden dispersal over the continent.
St. John's Wort - Beetle Parasites Imported
St. John's Wort - Beetle Parasites Imported
Journal of the Department of Agriculture, Western Australia, Series 3
Some hundreds of thousands of Chrysomelid beetles, which attack St. John's Wort, were recently forwarded to this State by air freight from the C.S.I.R.O. Division of Entomology, Canberra, and have been liberated at Greenbushes and Forestgrove.
Suppurative Otisis In Pigs, C R. Toop
Suppurative Otisis In Pigs, C R. Toop
Journal of the Department of Agriculture, Western Australia, Series 3
Suppurative otitis, an inflammatory condition involving the deeper structures of the ear, is commonly met with in young pigs. Affected animals show characteristic symptoms the most prominent of which is the abnormal carriage of the head which is constantly held on one side and this may be accompanied by difficulty in maintaining balance and direction.
Black Spot Or Early Blight Of Tomatoes, R F. Doepel
Black Spot Or Early Blight Of Tomatoes, R F. Doepel
Journal of the Department of Agriculture, Western Australia, Series 3
Black spot disease is one of the most important limiting factors to tomato production in the Geraldton district of this State. All above ground parts of tomato plants are affected and, under weather conditions favourable to the disease, serious defoliation and reduction of fruit yields are experienced.