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Articles by R. Mahmood
Total Records ( 2 ) for R. Mahmood
  M. Ayub , R. Mahmood , A. Tanveer and M.S. Sharar
  Two varieties of maize viz., Neelum and Akbar were compared at seed rates of 75, 100, 125 and 150 kg ha–1 in Faisalabad conditions. Varieties showed non-significant differences for all parameters studied except dry matter yield. Cultivar Akbar gave significantly more DM yield (7.18 t ha–1) than Neelum (6.09 t ha–1). Seeding densities showed significant effects growth and yield parameters. Plant height, green fodder yield, dry matter yield and crude fibre percentage was increasing with increasing seed density, whereas, the increase in crude fibre percentage could not reach to a significant level. While stem diameter, leaf area plant–1, crude protein percentage, total ash percentage and ether extractable fat percentage decreased significantly with increased seed rate. The cultivar Akbar and seed rate of 150 kg ha–1 seems to be the best for producing higher fodder yield of maize in Faisalabad conditions.
  R. Mahmood , M.A. Poswal and A. Shehzad
  Two species Sipha maydis and S. elegans were recorded from Pakistan. First one seems to be restricted to hilly areas of temperate climate and lesser annual rainfall with host range mainly restricted to Gramineae. The wild growing grasses including Phacelurus speciosus, Polypogon fugax, Hordeum murinum and Cynodon dactylon seemed its preferred hosts. In laboratory it did not complete its development on some of the reported hosts like sorghum, maize and Arundo donax. S. elegans was recorded occasionally in small numbers in mixed population with S. maydis on barley, wheat, P. speciosus, H. murinum and P. fugax. It was a first record from Pakistan and seems to be an introduced species. It did not breed well on wheat and barley therefore, it may have some other preferred host not recorded during the present studies. Lysiphlebus ambiguus was the only parasitoid recorded from S. maydis from Pakistan. It did not complete development in other aphids tried including some reported hosts such as Aphis gossypii and Aphis donacis. L. ambiguus is an aggressive parasitoid and its parasitism in field populations of S. maydis exceeded 62%.
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