"Some African countries export fruit and import fruit juice, or export olives and import olive oil, simply because their past colonialists did not teach them how to process food, " he told the AFP news agency.

BBC: S Korea 'in Tanzania land deal'

The government forecasts that in fifteen years' time it will need to import substantial quantities of grain, pulses, rice, fruit and vegetables.

BBC: NEWS | Science/Nature | India unveils six-year GM plan

In fact, fruit flies are so common in African mangoes that America has banned their import altogether, to protect its own orchards.

ECONOMIST: Biological pest control