Groups of anastomosis in Rhizoctonia solani Kühn attacking potato, bean and broad bean in four counties of Estado de Mexico and pepper in san Luis Potosi
DOI:
https://doi.org/10.33885/sf.1997.3.860Keywords:
Rhizoctonia solani, anastomosis groups, potato, pepper, bean, broad beanAbstract
Thirty nine isolates of Rhizoctonia so/ani attacking potato, bean and broad bean were collected in different
counties of Mexico state and one pepper isolate in San Luis Potosi. The number of nuclei per cell of
these isolates was determined as well as their anastomosis group. To determine the anastomosis group the
isolates were paired with "tester strains" on cellophane paper covered with a thin layer of water-agar (2%) in
sterile Petri dishes. The potato, bean and pepper isolates showed multinucleate cells and were identified as
Rhizoctonia so/ani. The 37 potato isolates had characteristics of the anastomosis group AG 3, and the pepper
and bean isolates of the anastomosis group AG 4. However, the broad bean isolate showed binucleate cells
and, therefore, it was identified as binucleate Rhizoctonia sp.
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