Özet:

During the 2017-2018 vegetation period, the ten districts of the Army province (Akkuş, Altınordu, Aybastı, Çatalpınar, Çaybaşı, Fatsa, Thursday, Gölköy, Gülyalı, Gürgentepe and Ulubey) are sick leafed cranberry plants and a total of fifty-four Rhizoctonia spp from their rizosphere land. Isolation has been achieved. The Rhizoctonia spp. The cultural characteristics of its isolates, anastomosis groups and pathogenicities have been studied. 62.96% of these insulates are binocleary (BN) Rhizoctonia spp. (AG-A, AG-E, AG-F, AG-K and AG-O) and 37.34% of the multinuclear (MN) Rhizoctonia solani (AG 1, AG 2-1, AG 4 and AG 5) were identified. The most common group in all the land that are surveyed is BN Rhizoctonia spp with 22 isolates. It is defined as AG-A. 10 of the remaining 32 isolates are R. solani AG 4, 6 BN Rhizoctonia spp. AG-K, 4 of R. Solani AG 2-1, four BN Rhizoctonia spp. AG-F, 3 R. solani AG 5, 1 R. solani AG 1, BN Rhizoctonia AG-E and AG-O. In the pathogenicity tests performed on leaf beans using 53.70% of all insulates, generally BN and MN Rhizoctonia spp. It has been found that there are statistically significant virulent differences between its isolates (P<0.05). The Rhizoctonia spp. The disease severity scale values of its isolates vary between 0.00 and 2.83, while the disease severity scale values of MN R. solani is shown to vary between 2.17 and 3.00. In addition, the AG 4, AG 2-1, AG-F, AG-E, AG 1 and AG 5 isolates, which do not have any significant difference between the disease severity scale values, have significantly reduced the growth parameters of the plant (plant length, body and root age and dry weights and root length) compared to control plants (P<0.05).

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