The overall objective of this paper is to know the structures, increases diametric means and the production of biomass and the amount of carbon sequestered four years later, between 2008 and 2012. The inventory was made in a permanent plot of 9 acres located in the northern block of the permanent device Yoko, whithn which all endividuals Prioria oxyphylla to dbh≥10cm were measured at 1.30m from abive the ground and surveying was materialized by two reds ripes painted and positioned by the coordinates x, y in the first season in 2008. And the second campaign made in 2012, was re-measure the same people and the same places. After the analysis, the total basal area was 1.1031m2 / ha (0.1226 ± 0.113 m2 /ha) in 2008 and that of 2012, it is 1.1599m2 /ha (0.1289 ± 0.1354 m2 /ha). The diametric structures and the years 2008 and 2012 are «S stretched». Diametric annual increases are 0.3 ± 0.46 for dominant and 0.16 ± 0.16 for the dominated. The biomass production increased from 19.5300t/ha (0.4246 ± 0.5545t/ha) in 2008 to 20.6724t/ha (0.4494 ± 0.5638t/ha) in 2012, a gain of about 0.2856t/ha/ Year. While the amount of carbon sequestered is increased from 9.7650t/ha (0.21123 ± 0.2726) in 2008 to 10.3362t/ha (0.2247 ± 0.2819t/ha) in 2012, a gain of the order of 0.1428 t/ha/year. Individuals Prioria oxyphylla are randomly distributed and the dominated are independent of the dominant within the permanent plot of the northern block of Yoko.

The Banana Bunchy Top Disease (BBTD), caused by the Banana Bunchy Top Virus (BBTV), is one of the important banana diseases in the Democratic Republic of Congo. It drastically reduces the production and diversity of bananas. This study focused on the production of banana and plantain planting materials free of BBTV from plants infected by micro-propagation and macro-propagation. 15 suckers of cultivars Litete [plantain (Musa AAB), French type)], Libanga Likale [plantain (Musa AAB) False Horn type)] and Bluggoe (Musa ABB) were used for micro-propagation and 15 others for macro-propagation. These suckers were collected from banana mats with stages 4 or 5 of BBTD symptoms. The Murashige and Skoog (MS) medium augmented with 30 g glucose, vitamins, 1 μM of Indole Acetic Acid (IAA) and 10μM of 6-Benzyl aminopurine (BAP) was used for micro-propagation. The plants resulting from stem fragments was used for macro-propagation. After 5 subcultures in micro-propagation, the sanitation rate was 76.6% for Litete, 66.6% for Libanga Likale and 76.6% for Bluggoe. After macro-propagation, the rate was 27.5% for Litete, 6.6% for Libanga Likale and 73.3% for Bluggoe. These results indicate that the proliferation rate increases the chance to clean up infected planting material explaining why macro-propagation is less effcient than micro-propagation.