Effects of tillage operations and plant density on leaf spot disease severity and grain yield of maize in ultisols

  • GO Ihejirika
  • MI Nwufo
  • EU Onweremadu
  • CI Duruigbo

Abstract

Two seasons experiments conducted in 2002 and 2003 revealed that Tillage operations significantly influenced leafspot disease severity; Percentage lodging 3.14; 2.08 and Grain yield 3.02; 3.84 in 2002 and 2003 respectively. Plant density also had significant difference on leafspot disease severity; Percentage lodging 4.82, 3.16 and Grain yield 4.00; 4.18 in 2002 and 2003 respectively. Spot tillage recorded low leafspot disease severity 0.94; 1.02 in comparison with Strip tillage 1.18; 1.30 when zero tillage (control) 2.28; 2.77 were high. 53,000 plants/ha recorded high leafspot disease severity 1.84, 1.95 in comparison with 26,666 plants/ha 1.05, 1.14 when 17,777 plants/ha 0.92; 1.00 were low in 2002 and 2003 respectively. Spot tillage recorded significantly highest grain yield 4.35; 4.72 tons/ha followed by strip 3.82; 4.02; when zero tillage 3.20; 3.66 were lowest. 53,000 plants/ha recorded high grain yield 4.51; 4.30 tons/ha in comparison with 26,666 plants/ha 2.48; 1.10 when 17,777 plants/ha 2.02; 1.95 were low in 2002 and 2003 respectively.

International Journal of Agriculture and Rural Development Vol. 7(1) 2006: 33-36
Published
2006-09-18
Section
Articles

Journal Identifiers


eISSN: 1595-9716