Anastomosis Groups and Pathogenicity ofRhizoctonia solaniIsolates from Brazil

Abstract

Anastomosis groups and pathogenicity of Rhizoctonia diseased plants. Each isolate was hyphalsolani isolates from Brazil. Plant Disease 69:599-601. tipped and conformed to the current species concept of R. solani (15). Anastomosis groups (AG) of 130 Rhizoctonia solani isolates obtained from 31 plant species found Throughout the study, all isolates were in I I states of Brazil were determined. Fifty-nine isolates were assigned to AG-4, 10 to AG-3, 42 to maintained on potato-dextrose agar AG-2, and 11 to AG-i. Eight isolates did not anastomose with any of the tester strains or among (PDA) slants at 10 ± 1 C and transferred themselves, and no isolate was assigned to AG-5. Pathogenicity of 35 isolates from different p d a lly t f0 me dium. anastomosis groups on hypocotyls and/or leaves of kidney bean, soybean, red pepper, radish, periodically to fresh medium. sugar beet, and cabbage varied considerably, from nonvirulent to highly virulent. In general, The isolates were subjected to hyphal anastomosis groups lacked host specificity. The optimum growth temperature for isolates tested anastomosis pairing by using the tester varied from 20 to 30 C.

Anastomosis grouping of Rhizoctonia solani and binucleate Rhizoctonia spp. isolated from pepper in Erzincan, Turkey

“…The most prevalent multinucleate AG was found AG-4 (85.2%), followed by AG-2-1 (7.4%), AG-6 (5.0%), and AG-3 (2.5%). The most common occurrence of R. solani AG-4 isolates on pepper has also been reported from other countries by several workers (Bolkan & Ribeiro 1985;EliasMedina et al 1997;Mikhail et al 2010). The population of binucleate Rhizoctonia spp.…”

“…The anastomosis groups of R. solani (AG-1, AG-2 type 1, AG-4, AG-8) and of the binucleate Rhizoctonia spp. (AG-A and AG-F) have been reported from peppers (Bolkan & Ribeiro 1985;Tuncer & Erdiller 1990;Demirci & Döken 1995). In contrast, R. solani (AG-1 and AG-8) were not found among the isolates from peppers in our case.…”

“…AG 4 is the major AG worldwide, causing root rot in pepper (Bolkan & Ribeiro 1985;Elias-Medina et al 1997;Mikhail et al 2010). Additionally, R. solani (AG-1) isolated from pepper has also been reported (Bolkan & Ribeiro 1985).…”

“…AG 4 is the major AG worldwide, causing root rot in pepper (Bolkan & Ribeiro 1985;Elias-Medina et al 1997;Mikhail et al 2010). Additionally, R. solani (AG-1) isolated from pepper has also been reported (Bolkan & Ribeiro 1985). On the other hand, R. solani (AG-3) has been reported to be the major causal organism of damping-off in directly seeded pepper (capsicum frutescens L.) fields (Katan & Eshel 1974).…”

A novel postharvest rot of okra pods caused by Rhizoctonia solani in Brazil

“…Seed transmission was not associated with fruit rot in any of these reports. Bolkan & Ribeiro (1985) obtained 131 isolates of R. solani from different hosts collected in Brazil, some of them causing rot in vegetable fruits such as eggplant and sweet pepper.…”