Commonwealth Agricultural Bureaux International (CABI) www.cabi.org and www.angrau.net ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY Rajendranagar, Hyderabad - 500 030. J. Res. ANGRAU Vol. XXXIX No.4 pp 1-134, October -December, 2011 ISSN 0970-0226 J. Res. ANGRAU Vol. XL No. 3 pp 1-146, July- September 2012