With the increase in biofuel production and increase in oil prices, its natural that the price of food is increasing. Biofuel production will increase the price of certain crops such as corn and also decrease the land available for
The lack of research into basic agricultural research means that current crops are vulnerable to pest resistant insects as seen from attacks on rice by pests. This lack a result of lack of funding into basic agricultural research with funding bodies now emphasizing on more lucrative sciences such as stem cell technology and tissue engineering.
This has not helped the situation.
The increase in oil prices also mean that many supporting services in farming; for example, machinery and transport is more expensive.
So various factors has caused a singular consequence experienced by many around the world and affecting the poor most.
UN report on food prices by BBC
BBC report on increasing food prices.
BBC report on Biofuels