吾家有6株Rose,4株也許品種較耐,少有病葉
只有1株多斑,1株多銹
正在弄
Cornell Formula,每周噴一次試試
The formula:
In one gallon of water, mix
1 tablespoon baking soda
1 tablespoon vegetable oil
1 or 2 drops dishwashing liquid
Shake well and then spray on the plant you wish to protect and/or rescue.