By Stuart Wale, Bud Platt, Nigel D. Cattlin
Overlaying the real pathogens, this instruction manual offers concise descriptions of the indications and cycles of illnesses, their distribution and fiscal value and recommendation on their regulate. it is also 'pest profiles' that determine with using color photos, the pests that quite often prey on potato crops.
Covering crucial pathogens, this guide presents transparent, concise descriptions of the indicators and cycles of ailments, their distribution and financial value and recommendation on their keep watch over. The textual content is illustrated with over 250 terrific color images of affected vegetation to help within the speedy identity of ailments. The ebook additionally contains 'pest profiles' that establish with using color images, the pests that often prey on potato crops. Read more...
content material: Bacterial illnesses --
Fungal and fungal-like illnesses --
Virus and phytoplasma ailments --
Nematodes --
bugs and different pests --
Non-infectious disorders
summary:
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Sample text
E. a later harvest date usually leads to more disease). The incidence of black dot also increases the more frequently a field is used for potato cultivation. In storage, infection and symptom development are favoured by warm, humid conditions. Studies have shown an increase in disease in F UNGAL tubers held at 15°C compared with those kept at 5°C. However, tuber necrosis may be accentuated at lower temperatures. Soil adhering to tubers in storage could be a source of inoculum contributing to disease development after harvest.
Gangrene). In section, lesions caused by F. sulphureum (syn. F. ) are light to dark brown in colour, dry and crumbly in texture with a distinct dark brown but irregular margin to the lesion (41). Fungal growth within the lesion can vary in colour from white, through yellow to red. In section, lesions caused by F. coeruleum are dark brown in the older part of the lesion, fading to a lighter brown which merges into the healthy tissue (42, 43). F. coeruleum lesions have a more regular edge than those of F.
1982) The effect of humidity on potato gangrene development in naturally contaminated tubers. Plant Pathology, 31: 61–64. Hide, G. , Cayley, G. R. (1989) Factors influencing the control of potato gangrene by fungicide treatment. Potato Research, 32: 91–99. , Copeland, R. , Little, G. (1976) The effects of various chemical and physical haulm treatments on the incidence of potato gangrene. Annals of Applied Biology, 84: 221–229. G ANGRENE Life cycle and biology Pycnidiospores (4–5 × 2–3 μm) can persist in dust in store – especially on a grading line – and contaminate otherwise healthy tubers.