My Chile de Arbol plants had something resembling powdery mildew on the back some leaves, so I bought some fungicide from a local company. The fungicide is Benomyl (used to be available in the US as Benlate).

I applied it at about 10am, using about 2.5 teaspoons per liter (about 22 grams per gallon, calculated at 2 grams per teaspoon). Also, I applied it to my Lime tree. About 6 hours later, when I went to my storage room, and looked at the label again, it hit me that I had used 5 times more than what I intended to use!

What I did, was try to wash it off my plants by hosing their leaves with water, and afterwards turning on the irrigation system.

Did I do the correct thing to prevent my plants from having leaf damage? How much fungicide is actually too much for a plant? When should I reapply the fungicide? (in it's correct dose!)

I now realize that while tending to my garden is relaxing, I shouldn't apply chemicals when I'm too concentrated on work stuff!