Spinosad Insecticide Ready to Spray - Effective Bagworm & Caterpillar

In this review the reviewer tested the Fertilome Spinosad Ready to Spray to see how it performs in backyard gardens and on ornamental trees. The bottom line: this ready-to-spray formulation is best for gardeners who want a targeted, OMRI listed option to control caterpillars, bagworms and other chewing pests without mixing concentrates. It stood out for quick knockdown of worms and visible reduction of damage on shrubs and fruit trees, making it a solid choice when ease of application and organic compatibility matter.

Key Features

• Controls a variety of insects: Formulated to target bagworms, tent caterpillars, leaf rollers, armyworms and other listed chewing pests for broad garden protection.
• Ready to spray convenience: Comes in an easy-to-use spray bottle so users can apply directly without measuring or mixing concentrates.
• OMRI listed for organic gardening: Suitable for use in certified organic production and for gardeners seeking approved organic tools.
• Designed for outdoor use: Safe to apply on vegetables, trees, shrubs, flowers, fruits and citrus when used as directed.
• Available formats: Product is offered as both a concentrate and a ready-to-spray option to match different user preferences.

Who It's For

This product is a good fit for home gardeners, small orchard owners and landscapers who need a fast, simple way to control caterpillars, bagworms and similar chewing pests without complex mixing. The ready-to-spray bottle is especially useful for users who prefer a grab-and-apply solution or who treat a few infested plants at a time.

Those who should look elsewhere include gardeners managing very large acreages who may prefer the concentrate to reduce packaging and cost per acre, and individuals seeking a non-insecticidal preventative; this product is for active control of listed pests rather than general repellent use.

Pros & Cons

Pros

• Effective against a wide range of chewing pests, with many users noting quick reduction in visible damage.
• OMRI listing gives confidence for organic gardeners and certified operations.
• Ready-to-spray bottle makes application straightforward and reduces setup time.
• Works on vegetables, ornamentals and fruit trees, offering multi-use flexibility.

Cons

• Some users reported concerns about cap tightness, which can affect storage and handling.
• Perceived as pricey by a few gardeners compared with bulk concentrate options.

Specifications

Product name	Fertilome Spinosad Insecticide Ready to Spray
Volume	32 oz
Active ingredient	Spinosad (OMRI listed)
Use	Outdoor: vegetables, trees, shrubs, flowers, fruits & citrus
Targets	Bagworms, tent caterpillars, caterpillars, leafminers, borers and listed insects
Formats available	Ready to Spray and Concentrate

Our Verdict

Fertilome Spinosad Ready to Spray is a dependable, user-friendly option for home gardeners and small-scale growers who need effective control of chewing insects with an OMRI listed product. The ready-to-spray bottle saves time and reduces the chance of mixing errors, making it good value for those who prioritize convenience and organic compliance despite a slightly higher price per bottle.

Frequently Asked Questions

Can I use this on fruit trees and vegetables?
Yes. The product is designed for outdoor use on vegetables, fruit trees, shrubs and flowers when applied according to the label.

Is this product allowed for organic gardening?
Yes. It is OMRI listed, indicating it is approved for use in certified organic production and handling.

Is this a concentrate or ready to spray?
This listing is for the ready-to-spray 32 oz bottle, and the formulation is also available separately as a concentrate if preferred.