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Paper Information

Journal:   IRANIAN JOURNAL OF PLANT PATHOLOGY   August 2001 , Volume 37 , Number 1-2; Page(s) 97 To 114.
 
Paper: 

IDENTIFICATION OF FUNGI ASSOCIATED WITH FOOT AND ROOT OF WINTER WHEAT IN THE CHAHARMAHAL-VA-BAKHTIARI PROVIINCE

 
 
Author(s):  HEIDARIAN A., ERSHAD D.
 
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Abstract: 

To determine the fungi associated with foot and root of wheats in the Chaharmahal-va-Bakhtiari provice, diseased samples were collected at the three growth stages namely seedlings, tillering, booting to seed hardening, during two growing seasons of 1997-98 from winter wheat farms in different parts of the province including: Saman, Ben, Lord egan, Shahr-e-Kian and Borougen. For this purpose, pieces of decaying and discolored parts of the root and foot were surface sterilized with commertial sodium hypochlorite (2%) for 2-3 minutes, and cultured on an acid and non-acidic PDA media. 146 isolates were obtained and divided into 8 groups, on the basis of morphological characters. Of each group, two isolates were selected at random and identified. Then pathogenicity tests were carried out by "Seed inoculation", "Root dip Methods" (RICE et aL" 1981). The results showed that, 6 fungus species were associated with the disease and among them Fusarium graminearnm was the most frequent (34 cases) which is considered to be the main incitant of foot and root rot of wheats. F. culmorum, F. solani, F. equiseti, Rhizoctonia solani and F. longipes with 32, 23, 18, 18 and 12 cases of isolation respectively ranked next in decreasing order. The results indicated that the main fungi associated with the wheat foot and root disease are different Fusarium spp., which probably are aggravated by moisture stress at different growth stages of crop due to poor irrigation management. The result showed that mean contamination of plants at different growth stages (seedling, tillering and flowering to seed hardening) were 11.6%, 13.18% and 30.68% respectively.

 
Keyword(s): FOOT & ROOT ROT OR WHEAT, FUNGI, CHAHARMAHAL-VA-BAKHTIARI PROVINCE
 
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