Studies of the reinfection of replanted cacao (Theobroma cacao) by cacao swollen shoot virus in Ghana
1988
Ollennu, L.A. | Owusu, G.K. (Cocoa Research Inst., Tafo (Ghana))
Investigation of the circumstances leading to re-infection of replanted cacao by cacao swollen virus (CSSV), a major cacao rehabilitation problem in the Eastern and Ashanti Regions (Ghana) is reported. The planting material includes virus-resistant inter-Amazon and Amelonado hybrids. The greatest number of infections occurred during the 4th and 5th year of planting after the plants have made canopy contact. Over 50% of infected trees occurred in the outer periphery of the plot. This suggests that infected old adjoining cacao trees close to the new plantings provide the ma1007in source of virus inoc
Показать больше [+] Меньше [-]