El-Kholy,, R., El-Shazly, A. (2006). INTEGRATED CONTROL OF RICE BLAST DISEASE. Journal of Plant Protection and Pathology, 31(2), 1071-1088. doi: 10.21608/jppp.2006.235171
R. M.A. El-Kholy,; A. M.A. El-Shazly. "INTEGRATED CONTROL OF RICE BLAST DISEASE". Journal of Plant Protection and Pathology, 31, 2, 2006, 1071-1088. doi: 10.21608/jppp.2006.235171
El-Kholy,, R., El-Shazly, A. (2006). 'INTEGRATED CONTROL OF RICE BLAST DISEASE', Journal of Plant Protection and Pathology, 31(2), pp. 1071-1088. doi: 10.21608/jppp.2006.235171
El-Kholy,, R., El-Shazly, A. INTEGRATED CONTROL OF RICE BLAST DISEASE. Journal of Plant Protection and Pathology, 2006; 31(2): 1071-1088. doi: 10.21608/jppp.2006.235171
1Department of Plant Protection. Fac. of Agric. (Cairo), Al-Azhar Univ.
2Dept. of Agricultural Botany. Fac. of Agric (Cairo). AI-Azhar Univ.
Abstract
Rice blast caused by Pyn'cularfa oryza. is one of the most important fungal diseases on rice crop in the world. Pyrrcufaria oryza, Heiminthosporium oryza, Afternarfa alternate. sfemphyir‘um sp. and Aspergr’iius sp. were isolated from leaves and panicles from the two tested cultivars (Giza 171 cv. and Sakha 101cv.) during the two tested seasons (2004 and 2005). These fungi were isolated most frequently from Giza 171cv. compared with Sakha101cv. Laboratory tests were performed to examine the sensitivity of P. oryza to Four compounds at different concentrations. The results obtained from in vitro tests indicated that, P. oryza was differ in sensitivity to the tested compounds. Fuji~one was the most toxic to mycelial growth of the fungus (ECso = 10.0 uga.iiml}, followed by Hinosan (En = 21.0 uga.i fml), followed by Beam (E059 = 30.8 uga.irml) and the Neemix (E050 = 63.0 uga.i!ml). Field experiments were conducted to evaluate of five treatments for control rice blast disease during two tested seasons under natural conditions. The results indicated that all the tested compounds reduced infection and severity on leaves and panicles in two tested cultivars (Sakha 101cv. and Giza 171w.) compared with the untreated control. Also, these treatments increased grain and straw yield of rice crop. The best results was obtained by Beam treatments, Fuji-one, Hinosan, respectively. The Plant-Guard treatment was the least effective, while Neemlx gave an intermediate effect.
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