Cassava Brown Streak Disease spread pattern

Cassava Brown Streak Disease (CBSD) is a serious viral disease affecting cassava production across East, Central, and West Africa. Recent field surveys show expanding distribution, with new infections confirmed in previously unaffected districts. Key symptoms include: - Yellowish brown streaks on mature stems and storage roots. - Root necrosis that renders tubers inedible. - Mild leaf chlorosis that can be confused with other cassava viruses. Recommended actions: - Plant certified disease-free cuttings from reliable sources. - Rogue infected plants and destroy them away from fields. - Practice crop rotation and avoid moving planting material from endemic areas. - Report unusual symptoms to WAVE diagnostic teams for confirmation. Continued surveillance and farmer education remain essential to limit further spread.