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Monterey Once A Year Insect Control II is an imidacloprid insecticide for control of leaf hoppers, mealy bugs, scale, whitefly, borers (including Emerald Ash Borer), and many other pests in ornamental trees, shrubs, and certain fruit and nut trees. Once A Year Insect Control II is used as a soil drench treatment that controls target pests for a whole season.
Product Documents
| Active Ingredient | Imidacloprid 1.47% |
|---|---|
| Target pests | Adelgids, Aphids, Vine Weevil Larvae (including Black Vine Weevil), Borers: Roundheaded Borers (including Asian, Longhorned Beetle and Eucalyptus, Longhorned Borer); Flatheaded (including Bronze Birch Alder and Emerald Ash Borers), Japanese Beetles, Lacebugs, Leaf Beetles (including Elm Leaf Beetles and Viburnum Leaf Beetles), Leafhoppers (including Glassy-winged Sharpshooter), Leafminers (including Birch Leafminers), Mealybugs, Pine Tip Moth Larvae, Psyllids, Royal Palm Bugs, Sawfly Larvae, Scales (including Armored Scale [Suppression] and Soft Scale), Thrips, Whiteflies |
| For use in | For use on outdoor trees and shrubs, including listed fruit and nut trees: Apple, Loquat, Oriental Pear, Pecan, Crabapple, Mayhaw, Pear, Quince |
| Application |
Trees: 1 oz. per inch of distance around trunk Shrubs: 3 oz. per foot of height |
| Pet safe | Yes, when used as directed on label - Safe when dry |
| Formulation | Systemic Insecticide |
| NOT FOR SALE TO |
CA, CT, DC, MD, ND, VT AZ, CO, MA, ME, NJ, NV, RI (Restricted To Licensed Applicators Only) |
| Shipping Weight | 2.26 lbs |
| Manufacturer | Monterey Lawn & Garden (Mfg. Number: LG 6340) |
| UPC | 022179102620 |
| EPA Registration | 228-525-54705 |
Do not apply near lakes, streams, rivers, or ponds. Do not apply to soils which are water-logged or saturated. Bucket or measuring utensils should not be used for any food or drinking water purposes after use with this insecticide.
For use on outdoor trees and shrubs, including listed fruit and nut trees:
DO NOT apply this insecticide, by any application method, to linden, basswood or other Tilia species.
Monterey Insect control
By Darrell on 07/24/2016
I was recommended to this product by Pro-cure Nursery. It was the end of May and I was told, that to be effective it should be applied in March, before sap was rising, to be effective. I went ahead and applied to 5 mature pecan trees. In mid June the worms hit heavy. I watered heavy with my springlers and could the see leaves green up and grow darker. Leaving me to believe I was pulling the sap to all of the tree. The worms were very active for about 3 weeks, Since July ! I have not found a single live worm. They have completely dried up. (They look like sand burrs in a wad) I will for sure treat all trees in March nest year
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11 of 11 people found this review helpful
Monterey
By Drucilla on 01/19/2015
Verified Purchase
It was easy to mix and use. Not sure how the end results will pan out because it is a systemic application and it takes time for the plants to take in the product and the insects to die. I'm hopeful that it will work and I will continue to purchase this
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5 of 9 people found this review helpful
Monterey Once A Year Insect Control II
By Pete on 04/30/2017
Monterey Once a Year with Imidacloprid is a tree saver!
By Kathy on 07/23/2019
Our apple trees have hundreds of holes in the bark. Looking up the problem on the internet, I suspected flat head and round head borers. Using the description, I pulled away the bark & found both kinds of borers and lots of frass. Not many products will kill these borers and still allow the fruit and nuts to be eaten. I have been using this product for 5 years and now buy it by the gallon because of all the different trees it can be used on.
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4 of 4 people found this review helpful
Didn't fix my Mealy Bug Problem
By Rusty on 08/09/2017
It didn't work on my Problem !!! BUT I was using it on Dipladenia & Mandevilla and the Mealy bug were well ahead of me. I had used Lady bugs. They got the Aphids but maybe I waited too Long to use the Juice. I used half a bottle in 2 gallons of Mix on 6 POTS.
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2 of 2 people found this review helpful
After using the drench early in the spring, is the fruit safe to eat? Can it also be used on pears and grapes?
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32 of 40 people found this answer helpful
I was told that this would only work on bare soil, otherwise just the plants would absorb the product and not the tree
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3 of 3 people found this answer helpful
I used your product on my columnar aspen trees and they started dropping a lot of leaves. Will your product kill my trees?
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0 of 1 people found this answer helpful
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2 of 5 people found this answer helpful
Instructions for Monterey say it is a systemic insecticide.
I live in Central Calif and our crepe myrtles are emitting lots of "honey dew" right now (late Sept) . If I apply Monterey OAY Insect control now, will it help the tree for 12 months? O is it best to wait and apply before the next grow season?
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1 of 3 people found this answer helpful
trying to make sure I am measuring these multi trunk trees correctly. Some have 5+ trunks.
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5 of 5 people found this answer helpful
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8 of 8 people found this answer helpful
Yes, you may consume apples from a tree that has been treated with the Monterey Once A Year Insect Control II.
Monterey Once A Year Insect Control II is labeled to control soft scale and suppresses armored scale.
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4 of 4 people found this answer helpful
Our grapefruit tree had over 400 fruit fully matured when the tree was diagnosed with a fungus and treated with the insect systemic in November. We are beginning to harvest and eat the fruit. I am worried that it might be destroying our gut bacteria! Please help.
Yes, you can harvest and eat fruit from trees that have been treated with Monterey Once A Year Insect Control II. It would have no effect on humans or destroy natural bacteria we have in our bodies just the pests that are on the label. However, this product does not have fruit flies or citrus on the label. I would recommend that you contact the product manufacturer Monterey Lawn & Garden to see what there recommendation would be. They can be reached at 559-499-2100.
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3 of 5 people found this answer helpful
Monterey Once A Year Insect Control II can be appled any time of the year as long as the ground is not frozen.
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41 of 44 people found this answer helpful
I have scales on my jasmine and I have used Monterey once a year in the past but this year its not working.
If you have already applied the Monterey Once a Year, and you are still seeing scale populations, then we would recommend pairing that treatment with a topical spray to knockdown the existing insects. Ferti-Lome Triple Action with 70% Neem Oil contains both pyrethrins and neem oil to suffocate and kill insects on leaf surfaces such as scale. Be sure to treat either in the morning or evening and to get thorough coverage of all leaf surfaces, especially the undersides of leaves.
If you are concerned about resistance to the imidacloprid because of years of use, then you could switch to a newer active ingredient, dinotefuran, which is found in Safari 20SG and Zylam.
Monterey Once A Year Insect Control II
Rating: 4.6 (9 Reviews / 58 Q&A)
