Integrated pest management for beans and gherkins in Madagascar   COLEAD is working with an exporting company based in Madagascar that is experiencing a drop in yields of green beans and gherkins due to heavy nematode pressure. This problem is since the same crops have been grown for several consecutive seasons without rotation or fallow periods, leading to a deterioration in soil quality. The company has begun to explore solutions, such as crop rotation with cover crops, which have shown… +