IN VITRO PATHOGENICITY TESTS OF SEVEN PHYTOPHTHORA SPECIES ON EUROPEAN CHESTNUT
DOI:
https://doi.org/10.20903/masa/nmbsci.2023.44.36Abstract
In this study, pathogenicity tests were conducted on seven Phytophthora species previously recorded on various tree species in North Macedonia. Single representative isolates of P. cactorum, P. colocasiae, P. taxon walnut, P. cinnamomi, P. gonapodyides, P. inundata, and P. cambivora were inoculated onto European chestnut twigs, with 40 replicates per isolate, categorized by two twig thicknesses. The results revealed a range of necrotic lesion lengths, from 1.6 to 5.9 cm, highlighting the varying impacts of the pathogen species on chestnut twigs. A two-way ANOVA indicated significant differences in lesion lengths between the two twig thickness categories across all Phytophthora species. Overall, P. inundata caused the shortest total lesion lengths, while P. cactorum caused the longest. Notably, lesion length variability for P. colocasiae was consistent across both twig thicknesses, whereas P. inundata showed the greatest variability between the two thickness categories.
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