It causes an infection called wheat streak mosaic virus. 它還引起了一場(chǎng)被稱(chēng)為小麥紡錘狀條紋花葉病毒的傳染病。
Two years age, Africa lost more than half its cassava crop -- a key source of calories -- to the mosaic virus. 兩年前,花葉病毒使非洲損失了超過(guò)一半的木薯,而這種作物是當地人的主要食物。