Journal of Entomology1812-56701812-5689Asian Network for Scientific Information10.3923/je.2011.468.475Pineus boerneri) in Sao-Hill Forest Plantation, Tanzania]]>PetroR. MadoffeS.S. 5201185The status of Pine Woolly Aphid (Pineus boerneri) was studied at Sao-Hill forest plantation, Southern Highlands of Tanzania. The major objectives of the study were to determine distribution and abundance of Pine Woolly Aphid (PWA) affecting main plantation species (Pinus patula and P. elliottii) and to assess intensity of damage between different age classes. Other objectives were to determine the parts of the tree crown mostly damaged and the extent of damage and to find out relationship between aphid abundance and damage. The main findings of the study were; the population densities of adult PWA did not differ significantly (p>0.05) for both P. patula and P. elliottii among the three blocks (Divisions) studied. However, Division one was more affected by aphids than other Divisions with the mean total adult population number of 17.4, 16.5 and 13.6 for P. patula and 6.7, 6.3 and 6.1 for P. elliottii for Divisions I, II and III, respectively. The mean total adult aphid population was found to be 10.1, 20.2 and 17.3 for P. patula for young, middle and old age classes respectively. In P. elliottii stands where only old class was observed, the mean total adult aphid was 19.1. Similarly, this age class was more affected than P. patula. On the other hand, the middle part of the tree crown was more damaged than other crown parts. There was a strong relationship between aphid abundance and damage between Divisions and age classes with coefficient of determination (R2) of 99.7 and 99.9%, respectively. The overall low intensity of aphid population recorded was probably due to the effect caused by predators like Tetraphleps raoi and some native natural enemies. Silvicutural operations, regular insect survey and monitoring programmes should be intensified in order to reduce the intensity of attack and spread of the pest.]]>Clementine, D., S. Antoine, B. Herve and F.B. Kouahou,2005Clavigralla tomentosicollis stal(Hemiptera: Coreidae), the pod sucking bug of cowpea in the sahelian zone of Burkina Faso.]]>2916Kisaka, E.Z.,1990Pineus pini) at Sao-Hill.]]>1990Leather, S.R., S.I. Ahmed and L. Hogan,1994Hylobius abietis.]]>91385389Madoffe, S.S. and O. Austara,1990Pineus pini (Macquart) (Hom., Adelgidae), on growth of Pinus patula seedlings in Tanzania.]]>110421424Madoffe, S.S. and O. Austara,1993Pineus pini in Pinus patula stands growing on different sites in the Sao Hill district, Tanzania.]]>72118121Madoffe, S.S. and R. Day,19951995pp: 99-108pp: 99-108Madoffe, S.S.,1989Pineus pini) on Pinus patula as related to site productivity at Sao- Hill Forest Plantation.]]>1989Madoffe, S.S.,20062006pp: 140-158pp: 140-158Mailu, A.M., C.P.M. Khamala and D.J.W. Rose,1980Pineus pini (Gmelin) (Adelgidae) in Kenya.]]>70483490Massawe, A.,1991Pineus pini (L.), a pest of pine plantations in Tanzania.]]>1991pp: 6872Mazodze, R., G.D. Piearce and P. Shaw,19901990Mlowe, E.M.,20072007Murphy, S.T., Y.J. Abraham and A.E. Cross,19911991pp: 124132Muthomi, J.W., P.E. Otieno, G.N. Chemining`wa, J.H. Nderitu and J.M. Wagacha,20085156163Ngegba, M.S.,19981998Nsolomo, V.R., S.S. Madoffe and S.M.S. Maliondo,20062006pp: 159-184pp: 159-184Odera, J.A.,1991pp: 135pp: 135Ruohomaki, K., M. Tanhuanpaa, M.P. Ayres, P. Kaitaniemi, T. Tammaru and E. Haukioja,2000Epirrita autumnata (Lepidoptera, Geometridae): grandiose theory and tedious practice.]]>42211223Solangi, G.S., G.M. Mahar and F.C. Oad,200853137Ullah, F., R. Gul and H. Badshah,2005Phyllocnistis citrella stainton (Lepidoptera: Gracillariidae).]]>22528Zwolinski, J.B.,1989Pineus pini (L.). A pest of pines in South Africa.]]>1515257Mirmoayedi, A. and M. Maniee,2009Earias insulana) with spray of diazinon and relaese of green lacewings.]]>65661