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POPULATION DYNAMICS OF LONGIDORUS ATTENUATUS (NEMATODA: LONGODORIDAE) AND TYLENCHORHYNCHUS CLAYTONI (NEMATODA: DOLICHODORIDAE) ON RED RASPBERRY AND BLACK CHOKEBERRY

Published in AgroLife Scientific Journal, Volume 8, Number 1
Written by Melika MOHAMEDOVA, Atanaska STOEVA

Plant parasitic nematodes Longidorus attenuatus Hooper and Tylenchorhynhus claytoni Steiner are serious pests on both red raspberry Rubus idaeus L. and black chokeberry Aronia melanocarpa (Michx.) Elliott grown in Bulgaria. Considering their importance as root parasites, the present study is a first step of evaluations done on nematode densities and seasonal fluctuation of their populations. Throughout one year survey, the highest population density of L. attenuatus was found at 20 cm soil depth, while the T. claytoni population was observed highest at 10 cm soil depth. The peak of the populations of the phytonematodes was observed in June and July on red raspberry and black chokeberry, respectively. The highest number of 321 individuals/100 cm3 soil of nematodes was found in raspberry field, while the number of 223 individuals/100 cm3 soil was observed in chokeberry plantation. The obtained data of population dynamics of L. attenuatus and T. claytoni clearly indicates the most appropriate time for control measures applying. The symptoms observed on root systems demonstrate the negative impact of nematode feeding and development on them. Further evolutions should be focused on searching of alternative methods of control of plant parasitic nematodes on red raspberry and black chokeberry.

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