What was the product? Generally a fungicide/insecticide won't kill a veggie, but some products may be unsuitable for veggies or tender green plants such as those that have an oil base if applied when it is hot/sunny out.

Letting us know what the product is can help us tell you if it is likely the cause of your plant's current struggles.

As a general rule, stay away from products that contain more than what you actually want. If you need a fungicide, but not an insecticide, don't use a combo product. Nothing good will come from it.

Sorry. The product is Garden Safe brand (not sure about that). It is a Fungicide 3 in 1. Fungicide, Insecticide and Miticide. It says it can be used on Roses, Flowers, Vegetables, Trees, Fruits and Shrubs. I hope that helps a bit.

Is there any possibility the sprayer was previously used with weed killer?

Other than that the only causes I can think of are that either the product was not labeled for some of the things it was used on or that it was applied improperly, maybe under hot sun as justaguy said.

A very rare situation would be that there was something wrong with the product. Very unlikely, but it has happened.

Jim

Ok, after more grilling of my hubby. It looks like he misread the size of the sprayer which was only 1/2 gallon and used enough fungicide for a 1 gallon sprayer. So, is there any hope for my garden and all my other fruits now that we know it was diluted incorrectly? UGH!!!