Best Spray For Gypsy Moths: Compare 10 Caterpillar Sprays

#1 · Best Overall

1. Safer Caterpillar Killer II

• Weight: 1 lb
• Form: Liquid
• Warranty Description: Warranty

Best for: Organic garden caterpillar control.

Why it ranks #1: Its listing explicitly names gypsy moth larvae and Bacillus thuringiensis var. kurstaki; the 16-fluid-ounce concentrate suits users able to mix spray.

OMRI Listed concentrate that names gypsy moth larvae among its targets gives organic gardeners a clearly specified option for caterpillar control. Safer’s formula contains Bacillus thuringiensis var. kurstaki, and the listing says it can be used up until the day of harvest when used as directed.

This 16-fluid-ounce liquid is a concentrate, so it suits gardeners prepared to follow the label and mix a spray rather than reach for a ready-to-use bottle. Its stated target list includes gypsy moth larvae, worms, and cabbage loopers, tying the product directly to caterpillar and leaf-feeder concerns. The listing also identifies use in organic gardening through its OMRI Listed status and says it can be applied up until harvest day. When used as directed, it is described as having no effect on birds, earthworms, or beneficial insects.

Skip it if you want a ready-to-spray bottle; Bonide Captain Jack's Bt Thuricide Ready-to-Use avoids concentrate mixing.

A good match for organic gardeners who need a product that names gypsy moth larvae and want harvest-day use when following directions. Choose another format if measuring and mixing a concentrate does not suit your spraying routine.

Listed on Amazon as: Safer Brand Caterpillar Killer II Concentrate Spray, 16 fl oz

#2 · Best Spinosad Option

2. Monterey Garden Insect Spray

• Form: Liquid

Best for: Organic gardeners targeting moths.

Why it ranks #2: The listing names gypsy moths and identifies spinosad; it is also OMRI Listed for organic gardening, though the 16-ounce liquid requires label-directed mixing.

Monterey’s 16-ounce Spinosad spray specifically names gypsy moths and tent caterpillars, giving gardeners a direct match for those listed pests. The product is OMRI Listed for organic gardening and described as fast-acting and odorless, useful details for choosing a garden spray.

The liquid formula uses Spinosad, identified in the listing as a naturally occurring bacteria, and controls a range of named insects that includes caterpillars, leafminers, codling moth, tent caterpillars, and gypsy moth. Its OMRI Listed status makes it relevant to gardeners selecting products for organic gardening. A measuring spoon is included, which supports measured use rather than guessing portions. The supplied information does not give a mixing rate, so follow the product directions for preparation and application rather than infer a dilution amount.

Skip it if you need a stated mix rate and treated-area coverage; Atticus Talak 7.9 F lists both for lawn and landscape use.

A fit for organic gardeners seeking a product that names gypsy moths and tent caterpillars, with a measuring spoon included. Because the supplied details omit a mix rate, consult its directions before planning application.

Listed on Amazon as: Monterey Garden Insect Spray, 16 oz with Measuring Spoon

#3 · Ready-to-Use Pick

3. Bonide Captain Jack's Deadbug Brew

• Weight: 2.4 lb
• Form: Spray
• Warranty Description: Warranty

Best for: Multi-crop organic garden spraying.

Why it ranks #3: This 32-ounce ready-to-use spray lists gypsy moth among its target pests and contains spinosad, making it a direct-match option without concentrate mixing.

Spinosad-based ready-to-use spray explicitly lists gypsy moths among a broad set of pests, helping gardeners address more than caterpillars with one product. Bonide also names a wide range of vegetables and fruit crops for use, making this a flexible option across mixed plantings.

The 32-ounce spray is applied after shaking, with directions to thoroughly cover the tops and undersides of leaves; that approach brings the treatment to both leaf surfaces. Its target list includes gypsy moths, tent caterpillars, borers, beetles, and other insects, while the stated crop range spans vegetables, stone fruits, bushberries, pome fruits, citrus, flowers, and ornamentals. The product is described as approved for organic gardening. This breadth suits mixed gardens, but application still needs to follow the listed directions and crops.

Skip it if you prefer a concentrate with a named Bt active ingredient; Safer Brand Caterpillar Killer II contains Bacillus thuringiensis var. kurstaki.

A practical pick for gardeners who want gypsy moths named on the label and need to treat varied edible and ornamental plants. Its leaf-coverage directions make it less suited to anyone seeking a quick, perimeter-only application.

Listed on Amazon as: Bonide Captain Jack's Deadbug Brew Insecticide, 32 oz

#4 · Bt Garden Spray

4. Bonide Captain Jack's Bt

• Weight: 2.3 lb
• Form: Spray
• Warranty Description: Warranty

Best for: Leaf-feeding caterpillar gardeners.

Why it ranks #4: Its Bt spray targets worms and caterpillar-stage insects and covers shade trees and ornamentals, but its listed pests do not specifically name gypsy moths.

Ready-to-use Bt spray lets you treat caterpillars on foliage without first measuring and mixing a concentrate. Bonide lists tent caterpillars among its targets and identifies use on fruits, vegetables, shade trees, and ornamentals, making it a fit for gardeners protecting more than one kind of planting.

Shake the bottle well and apply directly to the tops and undersides of leaves, so treatment reaches both exposed and sheltered foliage. For larger jobs, the product can be mixed with water and applied using a hose-end sprayer, pressurized sprayer, or mist blower, giving you a choice of application equipment. Its listed targets include tent caterpillars, and its use range covers fruits, vegetables, shade trees, and ornamentals. The stated selectivity is another consideration: the listing says it does not harm birds, earthworms, or beneficial insects.

Skip it if you need a product listing that specifically names gypsy moth larvae; Safer Brand Caterpillar Killer II does.

Choose this for a garden with caterpillar-prone vegetables, fruit plants, or shade trees, especially if you want several application-equipment options. Its listed pest targets include tent caterpillars, but do not assume every caterpillar species is named.

Listed on Amazon as: Bonide Captain Jack's Bacillus Thuringiensis BT, 32 oz

#5 · Hose-End Pick

5. Summit Caterpillar and Webworm Control

• Form: Spray
• Warranty Description: Warranty

Best for: Tree owners with hose access.

Why it ranks #5: This biological caterpillar and webworm control comes in a convenient hose-end quart and yields 12 to 24 gallons when mixed with water.

A hose-end format makes this Summit caterpillar and webworm control convenient for treating shade and fruit trees. The quart product mixes with water to yield 12 to 24 gallons of material, a stated range that helps tree owners plan coverage for larger foliage areas.

The ready-to-spray hose-end setup connects the product to a workflow that avoids manually loading a separate sprayer, while the description specifically calls out shade and fruit trees. Once mixed with water, the quart yields 12 to 24 gallons of material, giving buyers a clear stated range for planning a tree-treatment session. The product is described as biological caterpillar and webworm control. Its provided target description is narrower than a broad insect list, so match the named pests to your garden concern.

Skip it if you need gypsy moth larvae explicitly listed; Safer Brand Caterpillar Killer II names them as a target.

Consider this for shade or fruit tree owners who prefer hose-end application and value a stated mixed-volume range. Its description focuses on caterpillars and webworms, so check that the named targets fit your pest-control need.

Listed on Amazon as: SUMMIT 021-6 Caterpillar and Webworm Control-Hose End For Insects, 1-, Quart, White

#6

6. Southern Ag Thuricide BT

• Weight: 9.9 oz
• Form: Liquid

Best for: Biological caterpillar control seekers.

Why it ranks #6: This 16-ounce liquid is a biological Bt caterpillar control, but the listing does not specifically identify gypsy moths or provide application instructions.

Southern Ag Thuricide BT uses Bacillus thuringiensis in liquid form, offering a biological insecticide approach for buyers focused on caterpillar control. The supplied details identify it as toxic to certain pests, but do not provide a specific target list or application directions.

The product is identified as a 16-ounce pint of liquid Thuricide BT, with Bacillus thuringiensis named as its active ingredient and described as the same active ingredient as Dipel. That makes the biological-control approach clear for shoppers comparing caterpillar products by formulation. However, the supplied facts do not specify which caterpillar species it targets, how to dilute it, or which application equipment to use. Those omissions limit how confidently buyers can match it to a gypsy moth problem from this information alone.

Skip it if you need gypsy moths explicitly named with application details; Safer Brand Caterpillar Killer II lists gypsy moth larvae and provides a concentrate format.

This may suit shoppers specifically seeking a liquid Bt biological insecticide, but the supplied facts leave target species and application directions unspecified. For a gypsy moth treatment, prefer a listing that names the pest and explains its format.

Listed on Amazon as: Southern Ag Thuricide BT Caterpillar Control, 16oz – Pint

#7

7. Sevin Insect Killer Concentrate II

• Weight: 2.2 lb
• Form: Liquid
• Warranty Description: Warranty

Best for: Measured concentrate for garden pests.

Why it ranks #7: The 32-ounce concentrate covers over 500 listed insects and mixes with water, but its supplied pest information does not name gypsy moths.

A measuring cap and compatibility with handheld, hose-end, or tank-type sprayers give Sevin Insect Killer Concentrate II several ways to fit a garden’s application routine. Its listing covers more than 500 insects and states that control lasts three months for most listed pests.

This 32-ounce concentrate is mixed with water, so it suits buyers who already use a sprayer and want to prepare the amount needed for a job. The included measuring cap supports measuring to the label rate, and the product can be applied with a handheld, hose-end, or tank-type sprayer. It is described for gardens and flowers and says it will not harm plants or blooms when used as directed. The three-month duration excludes fire ants, fleas, ticks, and mosquitoes.

Skip it if you want ready-to-use spray with gypsy moths explicitly listed; Bonide Captain Jack's Deadbug Brew names them and needs no dilution.

A fit for gardeners who already own a compatible sprayer and want measured concentrate for flowers and garden plants. Its stated three-month duration has listed pest exceptions, and gypsy moths are not specifically named.

Listed on Amazon as: Sevin Insect Killer Concentrate II, 32 Oz

#8

8. Sevin Insect Killer Spray

• Weight: 8.4 lb
• Form: Liquid

Best for: Ready-to-spray broad garden coverage.

Why it ranks #8: This ready-to-use gallon spray kills over 700 listed insects, but the supplied details do not establish gypsy moths as a target.

The one-gallon ready-to-use format lets you begin spraying without mixing concentrate, while the listing says this Sevin formula kills on contact across more than 700 listed insects. It is aimed at protecting roses and edible plants from listed damaging pests.

This liquid is applied by shaking and spraying, with directions to hold the sprayer one foot from the plant and spray evenly. That ready-to-use workflow avoids a separate dilution step, while the gallon format provides a larger amount for garden tasks than a small bottle. The product is described for roses and edible plants and says it will not harm plants or blooms. Apply early or at the first signs of insect damage, as specified in the listing.

Skip it if you need gypsy moths explicitly named; Bonide Captain Jack's Deadbug Brew lists gypsy moth among its targets.

Choose this when you want a ready-to-use gallon for roses and edible plants and value the broad listed insect count. If gypsy moth specificity is essential, select a product whose supplied target list names them.

Listed on Amazon as: Sevin Insect Killer Spray, Ready-to-Use 2, 1 Gallon

#9

9. Atticus Talak 7.9% Bifenthrin

• Weight: 2 lb
• Form: Liquid

Best for: Indoor-outdoor perimeter treatment.

Why it ranks #9: Its 7.9% bifenthrin concentrate covers indoor and outdoor settings, but the listing does not identify gypsy moths or caterpillars as targets.

A water-based bifenthrin concentrate that can be used indoors and outdoors gives Talak 7.9 F a broad setting range beyond garden foliage. The listing says it dries clear, leaves no residue, and is odor-free, details that matter when choosing a treatment for living areas as well as outdoor spaces.

Mixing instructions specify one to six teaspoons per gallon of water for lawns and landscapes, with one gallon of mixed solution treating 1,000 square feet. A separate rate of two to six teaspoons per gallon is listed for surface-perimeter barrier treatment, helping buyers distinguish yard coverage from indoor-edge work. The concentrate contains 7.9% bifenthrin, and the formula is water-based. People and pets may re-enter once sprays have dried completely; the product is not available for sale in Connecticut, New York, or Vermont.

Skip it if you need a product whose supplied target list specifically names gypsy moth larvae; Safer Brand Caterpillar Killer II does.

This suits buyers managing both lawn or landscape areas and indoor perimeters who can measure and dilute concentrate. Follow the separate listed rates, allow the spray to dry before re-entry, and note the state-sale restrictions.

Listed on Amazon as: Atticus Talak 7.9% Indoor/Outdoor Bifenthrin Insecticide Concentrate (32oz)

#10

10. Agrisel Bifenthrin Pro 7.9

• Weight: 9.2 lb
• Form: Liquid

Best for: Large-area bifenthrin concentrate users.

Why it ranks #10: This gallon of 7.9% bifenthrin is described for broad pest control, but its listed examples and use details do not establish a fit for gypsy moths.

The one-gallon Bifenthrin Pro 7.9 gives buyers a larger-volume concentrate for lawn, ornamental, and agricultural settings. Agrisel also states that the formula becomes safe for pets one to two hours after application has dried, a useful re-entry detail for households with animals.

The product is a liquid insecticide with 7.9% bifenthrin and is positioned for multiple environments, including lawn care, ornamental plantings, and agricultural needs. Its broad-spectrum description lists pests such as spiders, ants, fleas, mole crickets, and stink bugs, while the verified directions mention spraying trails, entry points, and nests for the relevant pests. The pet-safety statement is conditional: the formula becomes safe for pets one to two hours after application has dried. The supplied target list does not specifically name gypsy moths.

Skip it if you need a spray explicitly listing gypsy moths; Monterey Garden Insect Spray names gypsy moth among its targets.

Consider this for buyers needing a gallon of bifenthrin concentrate across lawn, ornamental, or agricultural settings. Its stated pest examples do not include gypsy moths, so choose a specifically named caterpillar product for that target.

Listed on Amazon as: Agrisel Bifenthrin Pro 7.9 Insecticide, Insect Control, 1 Gallon