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 AJPS  Vol.5 No.26 , December 2014
Corynespora Leaf Blight of Cotton in Brazil and Its Management
Abstract: In recent years, Corynespora leaf blight is on the increase in cotton and has become an important disease in the State of Mato Grosso, Brazil. It attacks several plant species including soybean. It is not yet known whether the same strain of this pathogen attacks both the crops. The objectives of the present investigation were to verify the genotypic and phenotypic variation between the isolates attacking cotton and soybean and to verify the sources of resistance in cotton. Differential response of 23 cotton genotypes was studied under glasshouse conditions using mixture of two randomly selected isolates of C. cassiicola of cotton in equal proportion. Genotypic variation among three cotton and two soybean isolates was studied using ERIC/REP-PCR and rDNA molecular techniques. With one exception, all the cotton genotypes tested so far were susceptible to C. cassiicola isolates of both cotton and soybean. Similarly, results of both molecular techniques indicated that the C. cassiicola isolates attacking cotton and soybean belong to the same strain of the pathogen in Brazil. Since Corynespora blight is a newly immerging disease of cotton and soybean in Brazil, integration of crop rotation and the sanitary practices are suggested to manage the disease.
Cite this paper: Galbieri, R. , Araújo, D. , Kobayasti, L. , Girotto, L. , Matos, J. , Marangoni, M. , Almeida, W. and Mehta, Y. (2014) Corynespora Leaf Blight of Cotton in Brazil and Its Management. American Journal of Plant Sciences, 5, 3805-3811. doi: 10.4236/ajps.2014.526398.
References

[1]   Jones, J.P. (1961) A Leaf Spot of Cotton Caused by Corynespora cassiicola. Phytopathology, 1, 305-308.

[2]   Conner, K.N. (2004) Alabama Cooperative Extension System. Auburn University, Auburn, 1379.

[3]   Fulmer, A.M., Walls, J.T., Dutta, B., Parkunan, V., Brock, J. and Kemerait Jr., R.C. (2012) First Report of Target Spot Caused by Corynespora cassiicola on Cotton in Georgia. Plant Disease, 96, 1066. http://dx.doi.org/10.1094/PDIS-01-12-0035-PDN

[4]   Mehta, Y.R. and Barea, G. (1994) Enfermedades de soya y su manejo. Imprenta Landivar, Santa Cruz de la Sierra, Bolivia, 87 p.

[5]   Mehta, Y.R., Motomura, K.F. and Almeida, W.P. (2005) Corynespora Leaf Spot of Cotton in Brasil. Fitopatologia Brasileira, 30, 131.

[6]   Dixon, L.J., Schulb, R.L., Pernezny, K. and Datnoff, L.E. (2009) Host Specialization and Phylogenic Diversity of Corynespora cassiicola. Phytopathology, 99, 1015-1027.
http://dx.doi.org/10.1094/PHYTO-99-9-1015

[7]   Girotto, L., Marangoni, M.S., Matos, J.N., Almeida, W.P. and Mehta, Y.R. (2013) Identification of Phenotypic and Genotypic Variability among the Isolates of Ramularia areola of Brazilian Cotton. American Journal Plant Sciences, 4, 1893-1898. http://dx.doi.org/10.4236/ajps.2013.49232

[8]   Cutrim, F.A. and Silva, G.S. (2003) Pathogenicity of Corynespora cassiicola to Different Plant Species. Fitopatologia Brasileira, 28, 193-194. http://dx.doi.org/10.1590/S0100-41582003000200014

[9]   Spencer, J.A. and Walters, H.J. (1969) Variations in Certain Isolates of Corynespora cassiicola. Phytopathology, 59, 58-60.

[10]   Shimomoto, Y., Sato, T., Hojo, H., Morita, Y., Takeuchi, S., Mizumoto, H., Kiba, A. and Hikichi, Y. (2011) Phenotipic and Genetic Variation among Isolates of Corynespora cassiicola in Japan. Plant Pathology, 60, 253-260. http://dx.doi.org/10.1111/j.1365-3059.2010.02374.x

 
 
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