SYSTEMATIZATION OF CHLOROTIC MANIFESTATIONS ON POME AND DRUPACEOUS FRUIT PLANT SPECIES IN BULGARIA
Keywords:
chlorosis, pome and drupaceous fruit treesAbstract
The report presents data on chlorotic manifestations, observed within 2004 – 2013 on pome and drupaceous fruit species grown in different areas of Bulgaria. Those manifestations were systematized in view of their role as a key for further investigations on their etiology and the possibilities for their prevention and treatment. The data were collected during the inspection of fruit orchards that had been created either for industrial fruit production or family consumption. The inspection, marking of the infected trees, compiling an anamnesis for the separate pathological manifestations, collecting samples for laboratory testing and the sample tests present a research process. The established manifestations were generally classified as infectious and noninfectious, according to their etiology. The agents of the infectious ones were fungi and viruses and noninfectious were caused by the adverse effect of abiotic factors such
as excess soil humidity and obstruction of nutrient assimilation. Moreover, abiotic factors like excess soil humidity exposed the root system to the attack of fungal pathogens.
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