Evaluation of the transmission percentage of (Candidatus Liberibacter Solanacearum), in potato seed tubers (Solanum Tuberosum)
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Abstract
Potato purple top (PMP) is one of the most serious diseases affecting the potato crop in several countries of the Americas and the world; Candidatus Liberibacter solanacearum (CaLso) is the causal agent of this disease, which in recent years in Ecuador has caused significant economic losses. The management of PMP is focused on the control of the insect vector Bactericera cockerelli through the periodic application of insecticides. However, the use of seed from diseased plants can also cause the spread of the disease. This study complements the research that seeks to establish the percentage of disease transmission using seed tubers from plants with different symptomatology caused by CaLso in the potato variety Superchola. Thus, it was found that the percentage of transmission was 11.07% when tubers from plants with severe symptoms were used as seed, and if seed free of the disease was used, transmission was 0.06%. At the same time, a phenotypic scale was determined according to the degree of infection of the disease in parent plants.
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