Q.I Have Something Eating Leaves On Eggplant And Pepper Plants. And Browning And Curling Leaves On Squash And Cucumber Plants. All F
ine a week ago. See photos. Used Deconil insect on eggplants peppers and Deconil fungicide on the squash Cucs but getting worse. See pictures. Planted all plants. What do I need to do save my garden?

Certified GKH Gardening Expert
This looks a lot more like root rot than insect damage. Usually, this is caused by overwatering or having too heavy of a soil, that it doesn't dry out between waterings.
This problem will take, at least, a season to clear up.
The less that you can use to get rid of this problem the better. Using too many things on a problem will leave the soil unable to support plant life.
I recommend pouring boiling water over the whole area, first.
Solarize the spot. Laying plastic over the area, and letting the sun heat it up will kill off anything living there.
I would recommend amending the spot with plenty of organic compost. This will bring it back to a fertile condition and ensure that the correct types of microbes are in your soil. They will help fight off future infections.
Here are some articles that will help:
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/special/organic/the-importance-of-soil-for-an-organic-garden.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/improving-garden-soil.htm
After all is said and done, test your soil's pH and nutrient contents:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm