The new approach USES four or five weaker defences, for example reducing the area of the wheat plant that Ug99 destroys, or slowing down the spread of the fungus.

新的办法用的是四种或者五种更弱的防御措施，比如减少Ug 99能够杀死的小麦品种的种植面积，或者是减缓真菌的传播。

youdao

The new approach uses four or five weaker defences, for example reducing the area of the wheat plant that Ug99 destroys, or slowing down the spread of the fungus.

ECONOMIST: Wheat rust and world farming