Isolation and characterization of benomyl-resistant biotypes of the delta race of Colletotrichum lindemuthianum

By:

Tu, J.C

Contributor(s):

MCNAUGHTON, M.E

Material type: Article

ArticleLanguage: English Description: 60(2):585-589Subject(s): LOC classification:

14573

In: Canadian Journal of Plant ScienceSummary: Se aislaron 13 biotipos de la raza delta de la antracnosis del frijol (Colletotrichum lindemuthianum) resistentes al benomil, los cuales eran capaces de crecimiento radial de micelio en agar de Mathur (AM) que contenia 500 micra g/ml de benomil. La resistencia fue de tipo persistente y las caracteristicas de resistencia se retuvieron despues de varias subculturas en AM desprovisto de benomil. Varios biotipos perdieron parcial o totalmente la virulencia mientras que otros la aumentaron. Ademas, los biotipos individuales diferian en su patogenicidad hacia varios cv. susceptibles en ensayos realizados con Phaseolus vulgaris cv. Black Turtle, Ex Rico 23, Fleetwood, Kentwood, Pinto, Sanilac, Seafarer y Stenben. Las caracteristicas de cultivo, la esporulacion y el crecimiento diferian entre los biotipos y tambien con relacion a la raza delta original. Generalmente la patogenicidad se correlaciono positivamente con la cantidad de esporulacion, en los tipos virulentos. Se discute la importancia del desarrollo de los biotipos resistentes y la utilizacion de benomil en el tratamiento de la semilla para controlar la antracnosis del frijol. (RA-CIAT)Summary: Thirteen biotypes resistant to benomyl and which were capable of radiating mycelial growth on Mathur's agar (MA) containing 500 micrograms/ml of benomyl were isolated from race 6 of bean anthracnose (Colletotrichum lindemuthianum). The resistance was of a persistent type, resistant characteristics being retained after several subculturings on benomyl-free MA. Several biotypes lost virulence totally or partially while the others increased in virulence. In addition, individual biotypes differed in pathogenicity towards various susceptible cv. in tests conducted on Phaseolus vulgaris cv. Black Turtle, Ex Rico 23, Fleetwood, Kentwood, Pinto, Sanilac, Seafarer, and Stenben. The cultural characteristics, sporulation and growth differed among the biotypes and also from the original delta race. Pathogenicity generally was correlated positively for the virulent biotypes, with the amount of sporulation. The significance of the development of the resistant biotypes and the use of benomyl in seed treatment to control bean anthracnose is discussed. (AS)

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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Journal Article	CIAT Library Document collection CINFOS	Document Collection CINFOS	14573 (Browse shelf(Opens below))	c.1	Short Loan		100073033

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Se aislaron 13 biotipos de la raza delta de la antracnosis del frijol (Colletotrichum lindemuthianum) resistentes al benomil, los cuales eran capaces de crecimiento radial de micelio en agar de Mathur (AM) que contenia 500 micra g/ml de benomil. La resistencia fue de tipo persistente y las caracteristicas de resistencia se retuvieron despues de varias subculturas en AM desprovisto de benomil. Varios biotipos perdieron parcial o totalmente la virulencia mientras que otros la aumentaron. Ademas, los biotipos individuales diferian en su patogenicidad hacia varios cv. susceptibles en ensayos realizados con Phaseolus vulgaris cv. Black Turtle, Ex Rico 23, Fleetwood, Kentwood, Pinto, Sanilac, Seafarer y Stenben. Las caracteristicas de cultivo, la esporulacion y el crecimiento diferian entre los biotipos y tambien con relacion a la raza delta original. Generalmente la patogenicidad se correlaciono positivamente con la cantidad de esporulacion, en los tipos virulentos. Se discute la importancia del desarrollo de los biotipos resistentes y la utilizacion de benomil en el tratamiento de la semilla para controlar la antracnosis del frijol. (RA-CIAT) spa

Thirteen biotypes resistant to benomyl and which were capable of radiating mycelial growth on Mathur's agar (MA) containing 500 micrograms/ml of benomyl were isolated from race 6 of bean anthracnose (Colletotrichum lindemuthianum). The resistance was of a persistent type, resistant characteristics being retained after several subculturings on benomyl-free MA. Several biotypes lost virulence totally or partially while the others increased in virulence. In addition, individual biotypes differed in pathogenicity towards various susceptible cv. in tests conducted on Phaseolus vulgaris cv. Black Turtle, Ex Rico 23, Fleetwood, Kentwood, Pinto, Sanilac, Seafarer, and Stenben. The cultural characteristics, sporulation and growth differed among the biotypes and also from the original delta race. Pathogenicity generally was correlated positively for the virulent biotypes, with the amount of sporulation. The significance of the development of the resistant biotypes and the use of benomyl in seed treatment to control bean anthracnose is discussed. (AS) eng