Get this BT Concentrate:
https://www.amazon.com/Bonide-Products-803-Thuricide-16-Ounce/dp/B001D1H6SE/ref=sr_1_3?dchild=1&keywords=bt+concentrate&qid=1585892432&sr=8-3
and this Mist Sprayer:
https://www.amazon.com/2-Liter-One-Hand-Pressure-Adjustable-Telescoping/dp/B000AQNQ4Q/ref=sr_1_9?dchild=1&keywords=pressure+sprayer&qid=1585892471&sr=8-9
and spray once a week until a week before harvest and you should be caterpillar free. ezpz.