Browsing by Author "Msogoya, T.J."

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Effect of harvest methods on yield and quality of Marketable flowers of greenhouse rose cultivars of different growth habits
(2001) Msogoya, T.J.; Morisot, A.
This study was carried out to determine the effects of harvest methods (proximal and median harvests) on yield and quality of marketable flowers of greenhouse hybrid tea rose (Rosa hybrida L.) cultivars of different growth habits. The cultivar Grant Galla represented cultivars of vigorous growth habit whereas 'Vivaldi' respresented those non-vigorous growth habit. The proximal harvest method significantly reduced the number of marketable flower stems of non-vigorous cultivars but did not significantly affect the number of flower stems of vigorous cultivars. The proximal harvest method also improved flower quality in terms of grades, lenghts and weights of individual flower stems of both vigorous and non-vigorous cultivars. According to market studies, the proximal harvest method would increase revenue from vigorous cultivars and decrease revenue from non-vigorous ones. The median harvest method should be applied to non vigorous Rose cultivars.
Effects of local storage practices on deterioration of African eggplant (solanum aethiopicum l.) fruits
(2015) Majubwa, R.O.; Msogoya, T.J.; Maerere, A.P.
The objective of this study was to evaluate the influence of postharvest storage practices on shelf life of African eggplant fruits based on decay and water losses. A laboratory experiment was laid out in a split plot arrangement following a complete randomized block design with three replications. Three African eggplant cultivars (Tengeru white, Manyire green and AB2) and four post-harvest storage practices (perforated polyethylene bags, woven polypropene bags, closed paper boxes and on-bench storage) were used as main plot and sub-plot factors, respectively. Data were subjected to analysis of variance and means separation was conducted based on Student- Newman Keuls at P<0.05 using MSTAT-C statistical software. Results indicated that fruits stored in perforated polyethylene bags had significantly (p=0.001) the lowest water loss and longest shelf life though they suffered the highest incidence of decays. The decay and shelf life varied with African eggplant cultivars where cv. AB2 had significantly (P=0.001) the lowest decay incidence and longest shelf compared with cv. Tengeru white and Manyire green. Further studies are required to evaluate the effect of fruit disinfection prior to storage in perforated polyethylene bags on the shelf life of eggplant fruits.
Effects of weaver ants on fruitfly and disease-inflicted postharvest losses of oranges in small-scale farming in Tanzania
(2015) Msogoya, T.J.; Mamiro, D.P.; Mtui, H.D.
The objective of this was to evaluate the effect of African weaver ant (Oecophylla longinoda) on fruit fly disease-inflicted postharvest losses of oranges in small-scale farming in Coast region, Tanzania. The treatments consisted of weaver ant population estimated based on the number of nests (0, 2, 5 and 8) of weaver ants per tree and each was replicated three times. Orange fruits were randomly picked from farmers’ orchards at color breaker stage and were immediately transported and placed on benches in a postharvest laboratory at Sokoine University of Agriculture with average temperature of 19 and 28 °C during the night and day, respectively. Data were subjected to analysis of variance using GenStat Statistical Programme 12th Edition and treatment means separation was conducted based on LSD test at P ≤ 5 %. Results indicated that the incidence of fruit fly infection in orange fruits significantly (P < 0.05) decreased from 0.8 to 0.4 % as weaver ant population increased from 0 to at 2 nests per tree and the average number of pupae per fruit decreased from 0.58 to 0.04, respectively. Similarly, orange fruit decays significantly (P < 0.05) decreased from 20.4 to 10.2 % as weaver ant population increased from 0 to 2 nests per tree. Specifically, the incidence of decays due to anthracnose (Colletotrichium gloeosporioides Sacc.) decreased from 11.1 to 7.8 % and that caused by green moulds (Penicillium italicum Wehmer) decreased from 9.3 to 2.4 % as weaver ant population increased from 0 to 2 nests per tree. It is concluded that two nests of weaver ants per tree is an optimal population for substantial reduction of orange postharvest losses caused by fruit fly and fungal infections. The use of weaver ants can find wide applications in organic farming and small-scale orange farming where pesticide application is unaffordable. As the number of weaver ants per nest may differ, further studies are recommended to determine the actual number of weaver ants that can effectively reduce fruit fly and disease-inflicted decays, particularly in small-scale mixed cropping systems.
Effects of weaver ants on fruitfly and disease-inflicted postharvest losses of oranges in small-scale farming in Tanzania
(1998) Msogoya, T.J.; Mamiro, D.P.; Mtui, H.D.
The objective of this was to evaluate the effect of African weaver ant (Oecophylla longinoda) on fruit fly disease-inflicted postharvest losses of oranges in small-scale farming in Coast region, Tanzania. The treatments consisted of weaver ant population estimated based on the number of nests (0, 2, 5 and 8) of weaver ants per tree and each was replicated three times. Orange fruits were randomly picked from farmers’ orchards at color breaker stage and were immediately transported and placed on benches in a postharvest laboratory at Sokoine University of Agriculture with average temperature of 19 and 28 °C during the night and day, respectively. Data were subjected to analysis of variance using GenStat Statistical Programme 12th Edition and treatment means separation was conducted based on LSD test at P ≤ 5 %. Results indicated that the incidence of fruit fly infection in orange fruits significantly (P < 0.05) decreased from 0.8 to 0.4 % as weaver ant population increased from 0 to at 2 nests per tree and the average number of pupae per fruit decreased from 0.58 to 0.04, respectively. Similarly, orange fruit decays significantly (P < 0.05) decreased from 20.4 to 10.2 % as weaver ant population increased from 0 to 2 nests per tree. Specifically, the incidence of decays due to anthracnose (Colletotrichium gloeosporioides Sacc.) decreased from 11.1 to 7.8 % and that caused by green moulds (Penicillium italicum Wehmer) decreased from 9.3 to 2.4 % as weaver ant population increased from 0 to 2 nests per tree. It is concluded that two nests of weaver ants per tree is an optimal population for substantial reduction of orange postharvest losses caused by fruit fly and fungal infections. The use of weaver ants can find wide applications in organic farming and small-scale orange farming where pesticide application is unaffordable. As the number of weaver ants per nest may differ, further studies are recommended to determine the actual number of weaver ants that can effectively reduce fruit fly and disease-inflicted decays, particularly in small-scale mixed cropping systems.