Assessment of changes in carbon stock from land use and land cover change in necessary for carbon emissions/removals monitoring and enable countries to comply in line with the Good Practice Guidance of IPCC. This study aimed to estimate and map the historical changes in carbon emission and removal from land use and land cover change from 1986 to 2016 in Sudan savannah ecological zone of Ghana. Nested plot design was applied for field measurement, and Random forest algorithm was used to classify images. The zone was stratified into four Districts and each District further stratified into various land use and land cover (LULC) classes. Emission factors were determined for each LULC. Activity data were obtained from the spatial analysis. The overall carbon released from forest degradation and deforestation was found to be 554,684.96 Mg CO2 or 77.19% with 163,956.93 Mg or 31.84% removed. The inter-annual changes exhibited a decrease from 1986 to 1999, 1999 to 2006 and 2006 to 2016 with value being 642,342.79, 545,125.53 and 445,142.17 Mg CO2, respectively. More CO2 was released from forest degradation and in the area where cropland and forest have been converted to shrub/grassland; whereas carbon was removed in the area where shrub/grassland has been converted to cropland and/or forest land. However, more carbon was recorded in cropland compared to forest and shrub/grassland, which explains the difference in emission factor from carbon. Based on this finding reforestation and REDD+ implementation will be an efficient strategy for sustainable development in the Sudan Savannah ecological zone. In addition, farmers should be encouraged to maintain more trees on their farms to compensate for the forest loss.

RESUMECe travail a permis d'évaluer l'utilisation de l'hyménoptère Adelencyrtus femoralis dans la lutte biologique contre la cochenille brune (Aspidiella hartii) des stocks d'ignames. Cette étude a montré que A. femoralis, bien qu'ayant une fécondité faible (12,4 ± 1,5 descendants par femelle) et un cycle de développement court (19,96 ± 1,24 jours), a la possibilité de réguler les populations de la cochenille brune qui a un cycle de développement relativement long (33,69 ± 1,42 jours). L'action parasitaire de l'hyménoptère a été beaucoup plus importante sur la fécondité des femelles de la cochenille. L'inondation des stocks d'ignames avec des adultes de A. femoralis peut aboutir à des résultats permettant une meilleure conservation des stocks d'ignames. This work was conducted to study the possibility of using hymenoptera Adelencyrtus femoralis in the biological control of brown yam cochineal (Aspidiella hartii) in yam stocks. The study showed that A. femoralis, in spite of weak fertility (12,4 ± 1,5 descendants per female) and short development cycle (19,96 ± 1,24 days), has can regulate brown cochineal populations which have a relatively long development cycle (33,69 ± 1,42 days). Parasitic action of hymenoptera was more important on the fertility of young cochineal females. The flood of yams in stock with adults of Adelencyrtus femoralis can lead to a better control of the parasite and a preservation of yams stocks.

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