September 2006

Aspect of the biology of Rastrococcus sp. (Hemiptera: Psuedococcidae) on Acalypha hispida in southern guinea savanna of Nigeria

  The biology and description of various developmental stages of the mealybug found on the green acalypha plant in Ogbomoso, Southern Guinea Savanna was evaluated. The study shows that the stylets of the 1st and 3rd instars as well as adult stages are straight while that of the 2nd instar is somewhat coiled up. Furthermore, identification key chart was prepared using the characters which are peculiar to...

Author(s): Akintola A. J. and Ande A.T.

September 2006

Effect of Intra- and inter-row mixing of sorghum with two varieties of cowpea on host crop yield in a Striga hermonthica infested field

  A trial was conducted in the International Institute of Tropical Agriculture (IITA) research farm in Kano, Nigeria during the 2002/2003 cropping season to evaluate the effect of intrarow and interrow mixing of sorghum with two varieties of cowpea on host crop yield in a Striga hermonthica infested field. Significantly (P≤0.05) highest number of Striga per sorghum plant were obtained...

Author(s): B.S. Aliyu and A.M. Emechebe

September 2006

Effects of hydraulic retention time and media of constructed wetland for treatment of domestic wastewater

  A greenhouse experiment was conducted to investigate the effect of varying soil-to-sand ratios of constructed wetland on wastewater treating efficiency. Wetland beds were prepared with locally available plants, specifically cattail (Typha sp.). Treatment efficiency was evaluated for parameters such as BOD5, COD, SS, TKN and TP. The results indicated that the nutrient reduction corresponds to a longer...

Author(s): Suntud Sirianuntapiboon, Manoch Kongchum and Worawut Jitmaikasem

September 2006

A phenotypic study of growth traits in indigenous. Nguni cattle of Zimbabwe

Data from 2438 indigenous Nguni calves born at Matopos Research Station representing a total of   526 dams and 56 sires were used to evaluate the phenotypic variability and correlations of growth traits. Traits analyzed were weights at birth (BWT) (, weaning (WWT), yearling (YWT) and eighteen. A multivariate statistical model was used to analyze the data using SAS (1985 ). Sex and year of birth were highly...

Author(s): N. Assan