Dylox 420 SL Insecticide


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3.5 out of 5 stars Rating: 3.5

2 Reviews | 6 Q&A



{ $195.95 { $193.08
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Dylox 420 SL Insecticide jug (2.5 gals)

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Dylox 420 SL Insecticide

Dylox 420 SL Insecticide provides fast acting grub control. Dylox 420 SL Insecticide treats surface feeding insects on lawns, landscape and recreational turf, such as golf courses. After irrigation or rainfall, grub control is established in as little as 24 hours and penetrates thatch up to ½ inch thick. Dylox 420 SL Insecticide works by both contact and ingestion. This kills insects on landscape flowers, trees and shrubs instantly within contact. This also works on lawns and turf against damage from predators such as birds, raccoons and skunks. Dylox 420 SL Insecticide is known to be the best product available for third instar grubs because it works later in the season and provides a longer effective application window than other competitors.

Dylox 420 SL is compatible with registered pesticides, fertilizers or micronutrients.

Mixing Instructions

  1. Fill the spray tank 1/4 to 1/3 full with clean water
  2. While recirculating and with the agitatior running, add any products in PVA bags
  3. Continue to fill spray tank with water until ½ full
  4. Add any other wettable powder or wettable granules products
  5. Add any flowable ( FL or SC type products)
  6. Allow enough time for thorough mixing of each product added
  7. Add the required amount of Dylox 420 SL Turf and Ornamental insecticide and any other ‘SL’ type products; emulsifiable concentrates (EC), fertilizers, micronutrients and spray adjuvants
  8. Fill spray tank to desired level and maintain constant agitation to ensure uniformity of spray mixture

NOTE: Do not use PVA packets in a tank mix with products that contain boron or release free chlorine. The resultant reaction is a plastic that is not soluble in water or solvents.

Aerial application is prohibited. Not for use through any type of chemigation system. Do not use this product on turf being grown for sale nor is it for the use of crops used for food or forage.

Limit applications to 3 per calendar year with re treatment intervals of 7 days for turf. Do not apply more than 24.5 lbs of active ingredient per acre per year for controlling grubs and no more than 16.2 lbs for surface feeding insects.

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  • 22 of 23 people found this review helpful:

    5 of 5 stars  Dylox 402 SL for white grubs
    By Brent in Midland, MI on 05/14/2014
    Verified Purchase

    We tried GrubEx, Diazinon, and most other big box store products over the past 5 years or so with no noticeable impact on our lawn's grub infestation. This product killed the grubs overnight, after watering in. Birds no longer dig out grubs to eat, they just feed on surface insects now. Our lawn is coming back nicely. I applied this in May when the grubs were quite large and the product worked perfectly. I used the label suggested rate of 6.9oz/1000sqft.

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  • 2 of 5 stars  Dylox
    By Roger in Brooklyn ct on 10/16/2016

    applied product 2 weeks ago and had no effect on grubs ,very disappointed in the results,I thought this product was superior then Grub X .I am very disappointed in this product .

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05/21/2013 Bud from Palm Coast, Florida

QOn the average, how many gallons of water per 1000 square feet would be considered adequate?

AOn average you would use about 2 gallons of water per 1000 sq/ft.

7 of 7 people found this answer helpful.
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03/25/2014 Pat from Cape Coral Fl

QWhat is the ratio of Dylox Concentrate per gallon of water?
How many gallons of Dylox does each 2.5 gal of the concentrate make.

AThe mixing ratio for Dylox 420 SL Insecticide is dependant upon what you are treating for. Typically, you would use 4.6-6.9 oz per 1,000 square feet. Therefore, one 2.5 gallon jug of Dylox 420 SL Insecticide will cover 46,000-69,000 square feet depending on the ratio used. The amount of water is not as important as making sure to mix specified dosage of DYLOX 420 SL Turf & Ornamental Insecticide in sufficient water to provide adequate distribution during application to lawn, turf or groundcover area.

4 of 7 people found this answer helpful.
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01/23/2015 Bob from Cynthiana,ky

QIs Dylox 420 SL Insecticide safe for humans and pets?

ADylox 420 SL Insecticide is safe for humans and pets once the area that has been treated has dried. Please follow the label insturctions for application guidelines.

4 of 4 people found this answer helpful.
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11/05/2015 Kyle from Columbia, Il

QCan I apply Dylox 420 SL Insecticide after a good rain?
If I apply after a good rain is that good enough to where I don't need to water in the product?


We would advise to apply Dylox 420 SL Insecticide within 24-48 hrs within any rainfall before or after,†mixing at the recommended rates†so that the material can leave the residual to be effective for eliminating the taregted pests in the area.

1 of 1 people found this answer helpful.
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08/14/2014 Chrster from Mechanicsville Va

QIs two gallons of water really the right amount for 1000 sq. ft.??
This question and answer is currently in the Q&A section, but I am curious if the amount of water is correct.

AYes, with Dylox 420 SL Insecticide, you will need to use enough water that is going to give complete coverage of the soil or turf. Two gallons of water will ensure that the product is getting into the soil properly. The type of equipment used will determine the concentration required. Please let us know if you have any additional questions.

1 of 1 people found this answer helpful.
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06/03/2015 Richard from Orlando, Fl

QCan I use Dylox 420 SL while I'm seeding?
I have grass seeds on the ground that have not yet germinated. If I spray Dylox before germination while it kill the grass seeds? If so, how long should I wait before spraying?

ADylox 420 SL Insecticide can be applied while you are seeind. In fact it would be a good thing, since you would be watering more often. 

1 of 1 people found this answer helpful.
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