Volume 6, Issue 4 (winter 2003)
jwss 2003, 6(4): 151-158 |
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M. Niknejad Kazempour, H. Pedramfar, S. A. Elahinia. Effect of Certain Fungicides and Isolates of Antagonistic Fungi on Rhizoctonia solani, the Causal Agent of Rice Sheath Blight. jwss 2003; 6 (4) :151-158
URL: http://jstnar.iut.ac.ir/article-1-238-en.html
URL: http://jstnar.iut.ac.ir/article-1-238-en.html
Abstract: (23746 Views)
Antagonistic fungi Trichoderma harzianum (T1, from bean fields in Ahwaz, T2, from rice fields in Rasht), T. viride (T3 from bean fields in Shahriar, T4 from the collection in Plant Pest and Disease Institute, Tehran), Gliocladium virens (from bean fields in Kamal Abad, Karaj) and some fungicides (Benomyl, Carbendazim, Carboxin-Thiram, edifenphos and Zineb) were used to control sheath blight of rice incited by Rhizoctonia solani in vitro and under greenhouse conditions. The experiment was carried out in a completely randomized design with 12 treatments and four replications on Khazar rice cultivar in a soil infected by R. solani under greenhouse conditions. The results showed that the antagonistic fungi reduce sheath blight by 19.8 (T1), 21.5 (T2), 27.5 (T3), 19.6 (T4) and 18.5 (G1) percent. The antagonistic fungi in order of efficacy were T2>T3>T1>T4>G1. Benomyl, Carbendazim, Carboxin-thiram, Edifenphos and Zineb reduced disease by 32.5, 21.5, 12.8, 9.5 and 0 percent, respectively. Statistical analysis of data indicated that there existed no significant differences between T1, T3, T4, and G1 and Carbendazim fungicide to control disease however, the isolate T2 was as effective as Benomyl but Zineb had no effect on sheath blight.
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