Evaluation of Yield and Resistance Effect of Some Yam Genotypes (Dioscorea rotundata Pior) to Pest Attack at Harvest in Uyo, Southeastern Nigeria

Abstract

Two years study was carried to assess level of resistance to yam beetle and termite attack by some yam genotypes in Uyo, southeastern Nigeria. The experiment was laid out in randomized complete block design replicated three times. The five yam genotypes tested for yam beetle and termite attack at harvest were; TDr 95/19127, 95/18894, 95/19531, 75/1/2 and Uyo popular local variety eteme. The results showed variations in yield and susceptible to termite and beetle attack at harvest. The TDr 75/1/2 had highest yield 30.41 and 29.75t/ha, followed by TDr 95/18894, 28.86 and 27.93t/ha in 2008 and 2009 respectively. The local variety had lowest yield 9.75 and 10.07 t/ha in 2008 and 2009 respectively. The local variety had 14.58% termite attack in 2008 while 95/19127 had 12.64% in 2009. The local variety had highest beetle attack 45.83% and 32.76% in 2008 and 2009 respectively. The least prone to termite and beetle attack was recorded in TDr 75/1/2, 2.72 and 8.15% respectively in 2008 and 2.99 and 6.59% in 2009 respectively. The study suggested that TDr 75/1/2 and 95/18894 should incorporate in the farming system of the study area due to their high yielding capacity and resistance to pest attack at harvest.

Analysis of Soil Chemical Properties to Application of Poultry and Cow Manure from Different Housing and Stacking Types Following Telfairia occidentalis (HOOK F.) Production

“…Also, the finding of Follett et al ( 2007) confirmed this fact that application of organic residues heighten soil organic carbon level. It also supports another assertion that addition of organic manures regularly is the only method to increase soil organic carbon status [18,19,20]. Olowoake [5] also found that addition of manure improves soil properties.…”

Growth, Yield and Yield Characteristics of Three Pepper Cultivars to Fertilizers Application in the Mount Cameroon Region

“…In sweet pepper, it has been reported that, poultry manure alone increased plant height, yield and yield component [24]. In the same line, [25] have shown that the application of organic fertilizer affects the Journal of Agricultural Chemistry and Environment growth of soybeans. The increase in growth with poultry manure might be due to increase in nutrients supply that improved on the crop growth and the high level of organic matter also enhances the physico-chemical properties of the soil.…”

Yield and Post-Harvest Pest Status of Some White Yam (Dioscorea rotundata Poir.) Landraces in Uyo Southeastern Nigeria

“…The actual number of roots which eventually from tubers depends on several factors including genotypes, assimilate supply, photoperiod and temperature (IITA, 1990; Ikeh eta al, 2012). Despite genetic makeup of the crop, resistance to biotic stress such as insect pest, pathogens, nematodes also would encourage good quality tubers (Ikeh, 2010 andIkeh et al, 2012). Tuber yield also is a dependent on its photosynthetic efficiency and assimilation rate of such yam cultivar which usually correlate with leaf area, leaf area duration and crop management practices.…”