Monterey Once A Year Insect Control II Systemic Insect Treatment Concentrate
Best long-term pest solution for busy ornamental tree and shrub owners.
Protect your ornamental trees and shrubs from damaging pests with Monterey Once A Year Insect Control II. This powerful insecticide is applied as a simple soil drench around the roots, eliminating the need for spraying. It provides a full year of systemic protection against a wide array of insects, including borers like the Emerald Ash borer, adelgids, scale, whiteflies, and many more. Ideal for ornamental trees, shrubs, and certain fruit and nut trees, it ensures season-long defense for robust plant health.
$35.99
Owner Satisfaction
4.7
/ 5
Category Rank
23
/ 1717
#23 in Pesticides
Price vs Category Average
-19%
Below average
Container Size
1
/ Gallon
Who it's for
- Homeowners preferring easy, mess-free soil application methods
- Plant owners needing thorough coverage for hard-to-reach foliage
- Busy gardeners wanting low-maintenance, season-long plant protection
Who should skip it
- Eco-conscious gardeners prioritizing the safety of local bee populations
- Gardeners needing an immediate solution for active, severe pest outbreaks
- Vegetable growers looking for treatments safe for edible harvests
Performance breakdown
Application Efficiency
Soil drench method eliminates the hassle and mess of overhead spraying.
Protection Longevity
Single annual treatment provides reliable, season-long defense for ornamental plants.
Pest Spectrum
Highly effective against stubborn borers, scale, and various sap-sucking insects.
Systemic Potency
Active ingredient absorbs thoroughly to protect plants from the inside out.
User Convenience
Concentrated formula simplifies storage and reduces the frequency of garden maintenance.
Application Versatility
Safe for a wide range of ornamental trees and specific fruit varieties.
Key Specs
Container Size
1 Gallon
Application Method
Soil Drench
Control Duration
Full Year
Active Ingredient
Imidacloprid
Product Form
Concentrate
Model Number
HGC704617-01
Net Volume
128.0 fluid ounces
Application Frequency
One Time Application
Features
- Provides a full year of systemic insect control
- Simple application via soil drench, no spraying needed
- Controls a broad spectrum of common pests
- Effective against difficult pests like Emerald Ash borer
- Systemic protection for long-lasting defense
- Designed for ornamental and fruit/nut trees
What customers say
Monterey Once A Year Insect Control is highly regarded for its exceptional reliability and long term value. Its systemic action provides season long protection, removing the need for frequent applications. Users report significant improvements in plant health after a single treatment, finding it very effective against common pests. This convenience, combined with proven results, makes the concentrate a worthwhile investment for gardeners desiring dependable, low maintenance pest management. It offers peace of mind for a healthy garden throughout the year.
Know before you buy
This product is applied as a soil drench. You simply mix the concentrate with water according to the label instructions and pour it around the base of the tree or shrub, allowing the roots to absorb the insecticide.
Yes, it provides systemic protection for 12 months. Because the plant absorbs the active ingredient through its roots, it remains protected against targeted pests throughout the entire growing season.
It is labeled for use on certain fruit and nut trees, but you must check the product label to ensure your specific tree variety is listed. Always follow the pre-harvest interval guidelines provided on the packaging before consuming any fruit or nuts.
Yes, this product is effective against the Emerald Ash Borer. It works systemically to protect the tree from the inside out, which is the recommended approach for managing this specific pest.
As with any pesticide concentrate, you should follow standard safety precautions. Wear gloves and protective eyewear during mixing and application, and ensure you wash your hands thoroughly after handling the product.
This product contains Imidacloprid, which is toxic to bees. To protect pollinators, avoid applying the product to plants that are currently flowering or where bees are actively foraging.
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