The project aimed at developing effective integrated management methods for white coffee stem borers (CSB) in India, Malawi and Zimbabwe to reduce production and quality losses. CSB infestation causes national average annual reduction in yield of 13.4% and 14.8% in Malawi and Zimbabwe, respectively. CSB incidence is in general higher in marginal areas with low input production systems.
Field with more than 60% borer damage should be uprooted to avoid further losses. However, if farmers can handpick the larvae there is still a chance of coffee trees recovering. Shade trees can reduce CSB incidence. Biological control should focus on the conservation of native natural enemies attacking CSB. In Africa, white enamel paint applied to the lower 50 cm of coffee trunks was the most promissing physical control measure followed by bark smoothening with a maize cob. The pheromone trap technology developed in India is promissing, if cost of this to farmers can be reduced. Awareness raising and training of farmers and field extension workers regarding CSB and control measures proved to be successful.
More details about agricultural environmental parameters influencing CSB incidence, socio-economic factors and CSB control methods and their costs can be found by following the above link of the Final Technical Report.