| Generally, gross lesions are not observed in the central nervous system of birds affected with Newcastle disease virus regardless of the pathotype. |
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| To avoid such problems, it is recommended to develop a centralized set of standards for each disease or pathotype. |
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| Besides, the Peruvian pathotype showed a higher systemic spread than the Trinidadian pathotype. |
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| Further, wherever required, it can be used alongside the Trinidadian pathotype. |
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| Since, as mentioned under Hosts, this form does not appear to attack potatoes, it seems to be distinct at pathotype if not species level. |
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| It is therefore essential to know the pathotype involved in the original infestation, so that suitably susceptible cultivars may be chosen. |
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| A highly virulent pathotype is defined as one that attacks many of the differential varieties. |
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| In bioassays, cultivars of potatoes are used that are highly susceptible to the pathotype of S. endobioticum. |
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| If the original pathotype is not known, the bioassays should test for all pathotypes. |
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| In 1991, pathotype 1 was detected in the south-eastern part of the country. |
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| Some chrysanthemum cultivars appear to be more susceptible than others and there is evidence that there is more than one pathotype of the fungus. |
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| Countries in which only pathotype 1 occurs are advised to require that imported potatoes come from areas where the other pathotypes do not occur. |
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| Where the results of tests in the first year indicate that a variety is fully susceptible to a pathotype, there is no requirement to repeat these tests in a second year. |
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| They shall state the pathotypes or virulence groups to which the varieties are resistant, the degree of resistance and the year of its determination against the pathotype or virulence group. |
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| In the early 1950s, the disease became such a problem that in the north-eastern part, potato cultivars susceptible to pathotype 1 were forbidden and further phytosanitary measures were taken. |
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| The differentiation may take place at the pathotype level because many collections of varieties are known to show different resistance reactions to different pathotypes of the disease. |
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