The
Pyranha Zero - Bite Natural Insect Repellent is for use on horses, dogs, cats, ferrets, caged pets, and their premises but does not list vegetables as an acceptable application. The sponge method you are considering is also not permitted per the product label so therefore we cannot advise using this product in that manner. Per the
product label: Thoroughly spray infested areas, pet beds, resting quarters, nearby cracks and crevices, along and behind baseboards, moldings, window and door frames plus entire area of floor and floor covering. Place fresh bedding in animal quarters following treatment.
For controlling flies in vegetable gardens,
Cyonara Lawn & Garden RTS (Ready-to-Spray) would be recommended for a broad spectrum insect control.
Catchmaster Disposable Fly Traps are great to use outdoors around the home or property to draw flies away for 4-6 weeks. These traps should be placed atleast 30-50ft from the home and hung 4-5 ft high off the ground preferably where direct sunlight will hit it.
Please review our
How to Get Rid of Flies Treatment Guide for more information.