|Statement||by V.W. Jackson.|
|Series||CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches -- no. 81772, Circular / Manitoba. Dept. of Agriculture -- no. 52.|
|The Physical Object|
|Pagination||1 microfiche (8 fr.)|
Skin spot is a fungal disease of potato tubers which is generally symptomless until after approximately two months of storage, when the infected tissue begins to show spots on some varieties. This unsightly blemish reduces market value, but even processing crops might require extra peeling to remove well developed symptoms. Early blight usually affects potato foliage but tuber infections can also occur. Tuber lesions are dark, sunken, and circular often bordered by purple to gray raised tissue. The underlying flesh is dry, leathery, and brown. Lesions can increase in size during storage and tubers become shriveled. In potato, the brown rot pathogen is also commonly tuber borne. The bacterium usually infects potato plants through the roots (through wounds or at the points of emergence of lateral roots).Under favorable conditions, potato plants infected with R. solanacearum may not show any disease symptoms. Early blight, caused by the fungus Alternaria solani, develops on the leaves in July and August as plants begin to mature. It shows up first on the lower leaves as dark circular spots with concentric rings that increase to about l/4 inch in diameter (Figure 1). The spots develop a target pattern.
Several diseases affect potato plants, but the most common diseases are blight, verticillium wilt and rhizoctonia canker. These diseases are easily identified and if treated early enough, the plants may be saved. If the diseases are not caught early enough, the entire plant should be removed. These diseases are. Common Names of Plant Diseases D. P. Weingartner and W. J. Hooker, primary collators, updated by Walter R. Stevenson (last update 10/29/01) BACTERIAL DISEASES Bacterial wilt = brown rot Ralstonia solanacearum (Smith ) Yabuuchi et al. = Pseudomonas solanacearum (Smith ) Smith Blackleg and bacteria. Lenticel infections are typically ¼-½ inch in diameter and while still moist, may be raised and slightly darker than the potato skin. Flesh up to ½ inch deep under the infected lenticel is water-soaked and yellow to cream in color. When these infections dry out under dry or cold conditions, they are typically slightly sunken. Introduction to Potato Diseases and Pests. Are you growing potatoes on large scale? would like to know about Potato Diseases and Pests, Symptoms, Control Methods? the read the following. The potato is the most popular common crop in India. Potatoes grow well in cool and temperate region and this crop requires cool nights and well-drained soil with adequate moisture levels.
Favorable conditions for potato diseases development are frequently the same as the conditions needed for potato growth: temperature between 10°C and 25°C, high humidity, medium pH, etc. Adapted. The text is illustrated with some superb colour photographs of affected crops to aid in the rapid identification of disease. The book also includes `pest profiles' that identify, with the use of colour photographs, the pests that commonly prey on potato crops. Contents Potato Disease, Pest and Disorder Diagnostics 1 Bacterial Diseases 2. Potato Diseases presents the practical experience and scientific research in production and the diseases of the seed potato. The book features chapters on bacterial and fungal diseases, diseases caused by viruses, viroids, and mycoplasmas and by nematodes and insects, noninfectious diseases, and seed potato certification. Potato is the most important food crop of the world. The potato is a crop which has always been the ‘poor man’s friend’. Potato is being cultivated in the country for the last more than years. For vegetable purposes it has become one of the most popular crops in this country. Potatoes are an economical food; they provide a source of low cost energy to the human diet.