Seedlink are designing a low-cost, easy-to-use chemical swab which tests for pesticide residue on food crops. A large percentage of cocoa exported from West Africa is rejected because of high levels of pesticide residue. Current testing methods are lab-based and far out of reach for smallholder farmers or cooperatives. Seedlink allows testing to take place at the source, so farmers can measure and control their pesticide use. This also gives smallholder farmers the ability to know whether their cocoa passes EU regulations for pesticide use, enabling those farmers to access the lucrative export markets directly.