PJB-2018-580
LATE BLIGHT OF POTATO (PHYTOPHTHORA INFESTANS) IV: FUNGICIDES APPLICATION, POPULATION DYNAMICS, AND EMERGENCE OF THE VIRULENCE RACES OF THE PATHOGEN
Abdul Majeed
Abstract
Late blight of family Solanaceae which triggered massive starvation in Ireland during the 1940s, is caused by Phytophthora infestans and serve as a leading biological restraint to the production of potato and tomato. In particular, the disease has a tremendous impact on the yield outputs of the potato crop. The atrocities of P. infestans are managed with the extensive use of fungicides; however, fungicides application is also regarded as one of the contributing factors to the emergence of more virulence strains of the pathogen in recent years. P. infestans has two mating types –A1 & A2 –of which the later one was not much familiar in the world outside of Mexico till the 1980s. The migration of A2 from its center of origin to the rest of the world subsequently replaced the population structure which now comprises more diverse and aggressive races of the pathogen. To address the factors which are responsible for population dynamics of P. infestans, different assumptions have been made. This paper attempts to discuss fungicides application for late blight management and concerned hazards, lading factors linked with population changes and increased virulence of the pathogen.
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