The UN's Food and Agriculture Organization says, brown streak disease does more damage since it affects the root of the crop.

联合国粮农组织称褐色条斑病造成的损害更大，因为它影响了作物的根部。

There are many species;they become pesticide resistant; and they transmit hundreds of plant viruses that cause cassava brown streak disease and cassava mosaic disease.

种类繁多，对杀虫剂产生抗药性；它们传播数百种植物病毒， 导致木薯褐条病和木薯花叶病。