TriStar 8.5 SL

$49.75 - $599.00

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Not for Sale to: NY
NY residents, see our New York Pest Control page.

{ $49.75 { $49.33 $274.99 $271.90 $599.00 $590.00
  Size/Description Price/Ea. Qty
TriStar 8.5 SL bottle (4 oz)

Buy 1: $49.75 each

Buy 2 or more: $49.33 each

TriStar 8.5 SL - Quart quart (32 oz)

Buy 1: $274.99 each

Buy 2 or more: $271.90 each

TriStar 8.5 SL - Gallon gallon (128 oz)

Buy 1: $599.00 each

Buy 2 or more: $590.00 each

Total Price: $0.00

Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.

TriStar 8.5 SL

TriStar 8.5 SL is the longest lasting residual foliar spray available controlling insects for 4 to 6 weeks. TriStar 8.5 SL has mulitple ways to work on contact, systemically, and through translaminar activity to control a wide variety of insects including aphids, leaf-eating beetles (Japanese beetle), caterpillars, leaf miners, scales (soft and hard), mealy bugs, whiteflies, and thrips.

The EPA has classified TriStar 8.5 SL as a reduced risk insecticide providing for greater worker safety with a 12 hour re-entry interval for greenhouses and nurseries; and re-entry into commercial or residential areas when the application has dried. TriStar 8.5 SL also works well with miticides and fungicides.

Supplemental labeling for use on greenhouse grown tomatoes.


FOR USE ON ORNAMENTAL PLANTS, FLOWERING PLANTS, AND VEGETABLE TRANSPLANTS GROWN OUTDOORS AND IN GREENHOUSES, SHADEHOUSES AND LATHHOUSES: bedding plants, flowers grown for cuttings,foliage plants, potted flowering plants, ornamental trees, listed vegetable transplants and non-bearing fruit and nut trees (Non-bearing crops are perennial crops that will not produce a harvestable raw agricultural commodity during the season of application).

Do not apply to bearing fruit and nut trees.

For control of insect pests, apply either as foliar broadcast spray to obtain thorough and uniform spray coverage of the plants or via a basal bark or injection treatment. For foliar broadcast sprays, choose a finished spray volume appropriate for the size of the plants and amount of foliage which will provide thorough coverage throughout the canopy. For optimum control, allow at least 6 hours before overhead irrigation of foliage. Do not allow public use of treated area during application.

The longest lasting foliar spray residual on the market today.

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02/02/2014 Katherine from Grosse Pointe Shores, Mi

QWhat is the application rate for mealy bugs on orchids when using TriStar?
I have a stubborn mealy bug infestation on my small collection of orchids. How much should I use if I use a gallon sprayer? Can that amount be measured accurately with the measuring spout? Should I repeat the application, and if so, after what period of time?

AWhen treating for mealy bugs with the TriStar you will use 7.5 ml (0.25oz, 1.5 tsp) per 3 gallons of water for effective control. The Tristar bottle will measure as low as 5 ml in the built in measuring reservoir. It is suggested that you mix a surfactant with the TriStar when treating for mealybugs for better control. You can use the Non-Ionic surfactant we carry at the rate of 1-2 teaspoons per gallon of water. Do not make more than 4 applications per year. Do not reapply more than once every 7 days. To determine if application is necessary, monitor pest densities.

6 of 6 people found this answer helpful.
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03/27/2014 Niki from Ohio

QIn preventing thrip in a greenhouse...would this be best used as a spray or drench?
How much to use for preventing thrip in a 4 gal Bp sprayer or injector set at 1:100 ,


TriStar 8.5 SL has mulitple modes of action, on contact, systemically, and through translaminar activity to control a wide variety of insects including thrips. The best treatment method would be to use a combination of a soil drench and foliar spray. The soil drench will provide a longer residual and the foliar spray will provide a fster knockdown. You would mix 12.5-25.3 oz per 100 gallons of water or 0.125-0.253 per gallon of water.

2 of 2 people found this answer helpful.
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09/02/2015 Richard from Coventry

QAre there any heat restrictions on TriStar 8.5 SL?


TriStar 8.5 SL  like with most insecticides should be applied in the cooler times of the day. As far as shelf life, be sure to store in a cool dry area where temps do not freeze or go above 95 degrees. 

1 of 1 people found this answer helpful.
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09/01/2014 Dean from Charlotte Hall, Md

QHow much TriStar 8.5 SL would you use in a 2 gallon sprayer for Aphid control on Crepe Myrtle?

ATriStar 8.5 SL is labeled to be mixed at 4 fluid ounces per 100 gallons of water. There is a conversion chart on page 7 for smaller tank sizes.

1 of 1 people found this answer helpful.
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06/09/2017 Joe from California

QI'm trying to get rid of root aphids and fungus gnat larvae in potted plants. How much TriStar 8.5 SL should I use?
Would it still kill the aphids and gnat larvae in the pot if applied as a foliar spray? What rate do I use for foliar spraying?


Per the TriStar 8.5 SL instructions on the product label:For Aphids,†use 0.04 per gallon of water. †Apply as a full coverage foliar spray with a nonionic spreader-sticker adjuvant. When mixing with surfactant treat a small area first to make sure the surfactant does not cause phytotoxicity. For†Fungus gnat larvae, use 0.085 to 0.165 fl oz per gallon, ase the higher rate when insect pressure is high.†Apply as a directed spray to thoroughly wet the upper 1/2 to 1 inch of soil media.

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07/10/2013 Al from Eau Claire, Wi

QCorrection to previous question
that was 12 OZ - not 12 GAL - per thousand square ft. (conflicting data on TruGreen's work order slip)

ACan you please let us know what question you previously submitted that this is in reference to? There is not enough data in this for us to pull up the other question and accurately answer you. Thank you

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05/31/2017 Matt from Or

QCan TriStar 8.5 SL be used in a ULV fogger?


TriStar 8.5 SL is not labeled for fogging applications. Please take a look at our selection of ULV fogging concentrates here.†

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12/05/2013 Ann from Jupiter Fl

QWhat is the rate for 1/100?
My dosatron is set for 1/100 and I wanted to know how much Tristar I should use.

AThe amount of TriStar diluted with water would depend on what you are treating for. Below is the product label for more specific mixing instructions. Please let us know if you need anything else.

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