Food crops represent one third of Rwanda’s GDP, but the supply remains fragile due to soil pests such as white grubs, cut worm and bean fly which damage vegetable and root crops. Options for control are limited. A team from China, Africa, the UK and Switzerland is working with the Rwandan Agricultural Board (RAB) to provide farmers with access to an environmentally friendly, biologically-based control solution in the form of naturally occurring parasitic worms called entomopathogenic nematodes.