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Resistance and resilience to naturally acquired gastro-intestinal (GI) nematode parasite infections (predominantly Haemonchus contortus) were studied in 1785 lambs born over six lambings (1991 to 1996) consisting of 212 Red Maasai, 311 Dorper and 1262 crossbred (Red Maasai-Dorper) lambs in the su...


Baker, R.L.Nagda, S.M.Rodríguez Zas, S.L.Southey, B.R.Audho, James O.Aduda, Eric O.Thorpe, W.R.[Resistance and resilience to gastro-intestinal nematode parasites and relationships with productivity of Red Maasai, Dorper and Red Maasai X Dorper crossbred lambs in the sub-humid tropics]Resistance and resilience to gastro-intestinal nematode parasites and relationships with productivity of Red Maasai, Dorper and Red Maasai X Dorper crossbred lambs in the sub-humid tropics

Ewe lambs attain puberty at 10 months and 16.9 + 0.01 kg (56 percent of mature weight) and first lamb at 15 months. Postpartum anoestrus in 76 days, lambing interval is 8.4 months and 65 percent of ewes lamb three times in 2 years with a gestation period of 149 days. Ewes cycle year-round but oes...


Mukasa-Mugerwa, E.Lahlou-Kassi, A.[Reproductive performance and productivity of Menz sheep in the Ethiopian highlands]Reproductive performance and productivity of Menz sheep in the Ethiopian highlands

Tsetse control is often applied to an area which covers several herds. To carry out a trial using an uncontrolled area would be difficult because of the virtual impossibility of findings two areas identical in every respect. One solution (method 1) is to compare animal productivity before and aft...


Rowlands, G.J.[Assessing impacts of animal health interventions on productivity]Assessing impacts of animal health interventions on productivity

Presents the growth performance data of mainly indigenous trypanotolerant Djallonke sheep kept under traditional or improved management conditions in the humid south-east of Cote d'Ivoire; and reports that most lamb weights were significantly influenced by birth season.


Armbruster, T.Peters, Kurt J.Metz, T.[Sheep production in the humid zone of West Africa. II. Growth performance and liveweight of sheep in improved and traditional production systems in Cote d'Ivoire]Sheep production in the humid zone of West Africa. II. Growth performance and liveweight of sheep in improved and traditional production systems in Cote d'Ivoire

In 1988 and 1989, the effects of endoparasites on reproductive performance of on-farm sheep were studied at 5 sites in the Ethiopian highlands using nematode eggs per gram (EPG) counts, treamatode EPG and packed-cell volume (PCV). Mean litter size, lambing interval, annual reproductive rate and a...


Tekelye BekeleBruns, E.Kasali, O.B.Mutiga, E.R.[The effects of endoparasites on the reproductive performance of on-farm sheep in the Ethiopian highlands]The effects of endoparasites on the reproductive performance of on-farm sheep in the Ethiopian highlands

This article attempts to evaluate the current state of knowledge on questions such as, to what extent is inheritance important and how is it influenced by environmental factors; what are the mechanisms underlying increased resistance; and how productive are these breeds under various levels of ch...


Murray, M.Morrison, W. IvanMurray, P.K.Clifford, D.J.Trail, J.C.M.[Trypanotolerance - a review]Trypanotolerance - a review

Approx 20 insects and mites were found attacking cassava in several regions of Colombia at different growth stagcs and seasons. Thrips (Frankliniella williamsi), gall midges (Cecidomyiidae) and whiteflies (Bemisia sp. and Trialeurodes sp.) were present in greater than 50 percent of the plantation...


Díaz, R.O.Bellotti, Anthony C.Schoonhoven, Aart van[Insectos y acaros que atacan el cultivo de la yuca en Colombia]Insectos y acaros que atacan el cultivo de la yuca en Colombia

Chamaecrista rotundifolia cWynn has been identified as a promising forage legume for use in subhumid Nigeria. To establish if other accessions of this species have potential in the region, 21 accessions were evaluated for flowering, seed production, dry matter production, disease and pest inciden...


Tarawali, Shirley A.[Grassland improvement in subtropical Guangdong Province, China.]Grassland improvement in subtropical Guangdong Province, China.

The agricultural sector of the Democratic Republic of Congo continues tosuffer from declining productivity after a decade of civil unrest andunderinvestment. Plantain and banana (Musa spp.) are considered the second mostimportant staple crop after cassava (Manihot esculenta). The Congo basin is a...


Hauser, S.Dheda, B.Vangu, G.Mobambo, P.Staver, Charles[An innovation capacity analysis to identify strategies for improving plantain and banana (Musa spp.) productivity and value addition in the Democratic Republic of Congo]An innovation capacity analysis to identify strategies for improving plantain and banana (Musa spp.) productivity and value addition in the Democratic Republic of Congo

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