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Download Fire blight : the disease and its causative agent, Erwinia by J Vanneste PDF

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By J Vanneste

Fireplace blight is a big illness of apples, pears and likely woody decorative crops. it's as a result of the bacterium Erwinia amylovora. This organism used to be one of many first plant pathogenic micro organism to be widely investigated, and has develop into a version for learn through bacteriologists within the improvement in their subject.

Written through major examine staff from the us, Europe and New Zealand, this ebook is the 1st entire quantity for twenty years to deal with this topic.

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Additional resources for Fire blight : the disease and its causative agent, Erwinia amylovora

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Eds) Plant Diseases of International Importance. Vol. III, Diseases of Fruit Crops. Prentice Hall, Englewood Cliffs, New Jersey, pp. 32–65. V. (1992c) Monitoring flowers for presence of epiphytic Erwinia amylovora by stigma streaking. Phytopathology 82, 1077. V. C. (1992) The effect of rain on the development of Erwinia amylovora and Erwinia herbicola populations on apple flowers. In: Proceedings of the 45th New Zealand Plant Protection Conference, Wellington, New Zealand, pp. 301–303. 36 Sherman V.

Despite populations of 105–108 cfu per flower on the pistils, the styles were not invaded and infection did not occur. Wilson et al. (1989a) also showed that a population of 108 cfu mlϪ1 painted on the surface of anthers resulted in growth on the dehiscence zone and junctions of cell walls. The bacteria invaded the anther locule and contaminated the pollen with high populations of E. amylovora (Fig. 5). Thus contaminated pollen may also serve as a means of disease spread. The presence of high populations of epiphytic bacteria on healthy flowers provides for efficient movement of the bacteria from flower to flower by rain or by any insects that visit the flowers.

The early settlers saw, first,the loss of fruit production, particularly pears, which were susceptible European cultivars, such as ‘Bartlett’ and ‘Bosc’, and, secondly, the loss of their trees, as they succumbed to the disease (Wendell and Downing, 1848). Pear culture along the eastern seaboard and in the Great Lakes region felt the devastation of the disease, as many orchards fell victim to fire blight throughout the 19th and early part of the 20th century (van der Zwet and Keil, 1979). For this reason, pear culture has been mostly restricted to the drier regions of the west coast states.

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