Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2002.177.183 Mononychellus tanajoa (Bondar) (Acari: Tetranychidae) as Influenced by Varietal Resistance]]>NukenineE.N. HassanA.T. DixonA.G.O. FokunangC.N. 2200252The population dynamics of Mononychellus tanajoa as influenced by varietal resistance of cassava was determined over two cassava planting seasons (dry and wet season), using biweekly samples from 11 cassava genotypes in Ibadan, Nigeria. The population size of M. tanajoa and the damage scores were higher during dry than wet season. In 1993, there was a higher mite population and damage peak in January than in March, while in 1994, the peak occurred only in April. Mite population and damage generally varied significantly among genotypes and sampling dates, and decreased as the plant aged. High relative humidity rainfall, and low temperature inhibited the mite population growth. During dry season, the rate of mite increase was higher on the susceptible cassava genotype than on the resistant genotypes while situation was reverse in wet season. The study showed that varietal resistance of cassava had a significant effect on the population growth rates of M. tanajoa. January was the favourable period for screening cassava genotypes for resistance to M. tanajoa in Ibadan, Nigeria regions.]]>Akinlosotu, T.A., 1982Mononychellus tanajoa population on cassava, Manihot esculenta and its relationship with weather factors at moor plantation.]]>3251254Byrne, D.H.,1980Mononychellus tanajoa (Bondar) and Mononychellus caribeanae (McGregor) in cassava, Manihot esculenta (Crantz).]]>1980Byrne, D.H., J.M. Guerrero, A.C. Bellotti and V.E. Gracen, 1982Mononychellus mite resistant and susceptible cassava cultivars under protected vs. unprotected conditions. ]]>22486490CIAT., 19771977CIAT., 19921992Ezulike, R.T., R.I. Egwuatu and S.O. Odurukwe,1991Mononychellus tanajoa (Bondar) and its indigenous predator, Amblyseius fustis (Pritchard and Baker) in Nigeria.]]>8131137Hahn, S.K., J.C.G. Isoba and T. Ikotun,1989Vol. 35,pp: 147-168pp: 147-168Herren, H.R. and P. Neuenschwander,199136257284IITA.,19921st Edn.,pp: 208pp: 208IITA,1993Vol. 1,pp: 42pp: 42Kanno, H., A.G.O. Dixon, R. Asiedu and S.K. Hahn,19921992pp: 99102Markham, R.H. and I.D.A. Robertson,19871987Ndayiragije, P.,1984Mononychellus tanajoa Bondar) in Burundi.]]>1984pp: 6773Nukenine, E.N.,1996Mononychellus tanajoa Bondar.]]>1996Nukenine, E.N., A.G.O. Dixon, A.T. Hassan and J.A.N. Asiwe, 199974757Nyiira, Z.M.,1972Mononychellus Tanajoa Bondar. ]]>pp: 14pp: 14Nyiira, Z.M.,1976Mononychellus tanajoa in Uganda.]]>1976pp: 2229Ojo, J.B.,19921992Painter, R.H., 1951pp: 550pp: 550Peters, K.M. and R.E. Berry, 198073235238Samways, M.J., 197969491505SAS Institute, 19931st Edn.,Shukla, P.T., 1976Mononychellus tanajoa Bondar) resistance in Tanzania local cassava varieties.]]>425559Toko, M., J.S. Yaninek and R.J. Oneil,1996Mononychellus tanajoa (Acari: Tetranychidae) to cropping systems, cultivars and pest interventions.]]>25237249Yaninek, J.S., G.J. de Moraes and R.H. Markham, 1989Monoychellus Tanajoa Bonder) in Africa.]]>pp: 210pp: 210Yaninek, J.S., H.R. Herren and A.P. Gutierrez,19878861865