We are unsure what you are treating for but we have linked the product label instructions below:
Monterey B.t. Insecticide? is an organic OMRI rated insecticide and should not be mixed with any other insecticides. Doing so would change its formula and composition and it would not longer work as intended. Monterey B.t. Insecticide is mixed at 1.5 oz. per 3 gallons of water per 1,000 sq. ft. for Fruits and Vegetables and 2 oz. per 3 gallons of water per 1,000 sq. ft. for Ornamentals.
Sevin Insecticide Granules are not labeled for Gypsy Moth Caterpillars. Monterey B.T. Insecticide is labeled for gypsy moth caterpillars and can be used on fruits, vegetables, ornamentals and shrubs.
Fruits and Vegetables: 1.5 oz. per 3 gallons of water per 1,000 sq. ft.
Ornamentals 2 oz. per 3 gallons of water per 1,000 sq. ft.
Monterey B.t. Insecticide should be applied with a handpump sprayer. It is not labeled to be used in a cold fogger.
Monterey B.t. Insecticide can be applied in a hand pump sprayer or hose end applicator for applications to shade trees and ornamentals.
Monterey BT would be a great option for use on insects that are commonly found on cabbage. The mixing ratio is 1.5 fl. oz. per 3 gallons of water.
Monterey B.t. Insecticide is not labeled for fleas or ticks. Wondercide Outdoor Pest Control - Lawn and Landscape would be a good natural product to use.