Browsing by Author "Kagezi, G.H."

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    Ecological factors influencing incidence and severity of Coffee Leaf Rust and Coffee Berry Disease in major Arabica coffee growing districts of Uganda
    (Uganda Journal of Agricultural Sciences, 2013) Matovu, R.J.; Kangire, A.; Phiri, N.A.; Hakiza, G.J.; Kagezi, G.H.; Musoli, P.C.
    Coffee Leaf Rust and Coffee Berry Disease are the most devastating diseases of Arabica coffee in Africa. The importance of coffee in economies of many African countries like Uganda, presents urgent need for cost-effective disease control strategies. In this study, 192 coffee farms were surveyed and their corresponding incidence and severity recorded. Nebbi district had the highest CLR incidence (90.2%) and severity (2.2%) followed by Sironko (67.9% and 1.9%) and least in Kapchorwa (20.4% and 1.3%) respectively. CBD incidence was highest in Kapchorwa (6.0%) followed by Nebbi (1.7%).There was no CBD incidence observed in Sironko. There was a significant (pd”0.05) interaction between altitude and disease severity. Thin and medium shade intensity had highest CLR incidence followed by thick and no-shade levels. CLR was highest in farms under mono-shade followed by farms under mixed-shade and least in open-farms. CLR severity was found to be highest at very steep slopes and medium slopes and least on gentle slopes. In conclusion, CLR was present in all surveyed districts while CBDoccurred in Kapchorwa and Nebbi districts at intensity levels enough to trigger economic losses.
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    Implications of Black Coffee Twig Borer on cocoa in Uganda
    (African Journals Online (AJOL), 2014) Kagezi, G.H.; Kucel, P.; Egonyu, J.P.; Ahumuza, G.; Nakibuule, L.; Kobusinge, J.; Wagoire, W.W.
    Cocoa (Theobroma cacao L.) is one of Uganda’s major cash crops. It is grown by 15,000-18,000 smallholder households on an estimated 20,000 hectares. Cocoa contributes about US$65 million annually to the country’s foreign exchange earnings. On account of its perennial nature and robust vegetative growth, cocoa harbors a wide range of insect pests which affect its production. Here, we report for the first time an outbreak of the Black Coffee Twig Borer (BCTB), Xylosandrus compactus (Eichhoff), a new pest on cocoa in Uganda. To determine its spread and impact, we surveyed 20 households in Bundibugyo, Kibaale and Hoima districts in January 2014. On each field, 10 cocoa trees were examined for BCTB infestation along a transect. Overall, more than half of the cocoa plantations, 13% of trees and 3.8% of primary branches were infested. At district level, Kibaale had the highest proportions of infested fields (100%), trees (30%) and primary branches (8.5%). The seriousness of BCTB prevalence is likely to complicate the current BCTB spray programme on coffee in the country.