1. Phytopathogens can cause significant damage to crops and affect agricultural productivity.
植物病原体对作物造成严重的损害，影响农业生产力。
2. Researchers are studying ways to control the spread of phytopathogens and develop resistant plant varieties.
研究人员正在研究控制植物病原体传播和培育抗病植物品种的方法。