Demand-Driven Technologies for Sustainable Maize ... - IITA

277Table 2. Plant counts/ha (x1000) of Striga species in crop and fallow fieldsin three ecological zones of northeast Nigeria.Ecological zoneType of fi eldand fi eld locationSorghum 1 Maize 1 Rice 2 Fallow 3 Cowpea 4Ecological ZoneSudan savanna 123.8 a 97.4 a 1.7 b 8.6 a 24.8 bNorthern Guinea 98.3 ab 44.0 b 13.3 a 4.5 ab 37.4 asavannaSouthern Guinea 72.2 b 43.6 b 7.5 a 2.7 b 13.3 bsavannaMean 94.5 64.8 8.8 5.3 26.9SE 61.4 50.8 6.8 3.6 9.3Field LocationCompound 116.7 a 56.1a 13.2 a 6.1 a 30.7 aBush 76.2 a 72.9 a 5.1 b 4.4 a 23.3 aSE 25.6 36.7 4.8 3.7 9.0Associated Striga species were 1= Striga hermonthica, 2 = Striga aspera 3 = Striga densiflora,4 = Striga gesnerioidesMeans followed by the same letter in a row are not signifi cantly different at P