Monterey Garden Insect Spray RTU is a dual-action, broad-spectrum insecticide and fungicide containing the natural substances Spinosad and Potassium Salts of Fatty Acids to control a wide range of pests like caterpillars (worms), thrips, leafminers, and even powdery mildew.
 
Staggs Garden Center likely recommends it because its OMRI Listed® formula is approved for organic gardening, offering gardeners a powerful, ready-to-use solution that rapidly stops feeding damage while being less harmful to beneficial insects like ladybugs and lacewings when applied properly.