When applying a product like Barricade 4FL Pre-Emergent Herbicide (Prodiamine) you should inspect the lawn and see if the soil is still saturated or not. Sometimes an inch of rain is absorbed well into the soil, and other times the soil may already have a lot of moisture and that could cause runoff and uneven weed control. If it was only a light rain and the soil is not saturated it should still be okay to apply. You do need to be sure to water in with irrigation or rainfall after application as directed on the label
Barricade 4FL Herbicide can be applied once or twice per year as long as you don't go over the 1.1 ounces per 1000 sq. ft per year(21 oz per acre/per year) for Turf Type Tall Fescue.
Doing a split application 60-90 days following the 1st application will give you longer residual control as opposed to a single application. We would recommend doing a second application at the 0.5 oz rate per 1000 sq ft to get the longer monthly residual.
Please review the charts of page 12 & 12 of the product label for more information.
Barricade 4FL Pre-Emergent Herbicide (Prodiamine) does not list Ajuga reptans on its label. For a complete list see the label here. The Dimension product label states that ajuga carpet bugle is tolerant to applications as an alternative.
Yes, once you apply Barricade 4FL Pre-Emergent Herbicide (Prodiamine) in February, you can apply fertilizer at or around the same time. The only time we don't recommend applying a fertilizer is if it already contains a pre-emergent. If it is only a fertilizer, you can apply it at any time.
Ideally watering in is done right after application of Barricade 4FL Pre-Emergent Herbicide but can be within 7 days of application. Timing your treatment with the rainfall is the best way to go as long as not too much! It only needs to be watered in ½ inch.
We always recommend using products exactly as directed on the product label for several reasons. First, a product label has been reviewed and approved by the EPA and, therefore, provides the legally allowed uses for a product such as an insecticide or herbicide: The Label is the Law. Second, lots of time and money goes into developing and testing products, which means the label rates are what have been proven scientifically to be effective for treating the pests/weeds/diseases on that label. Using more is not necessarily going to be better. In fact, using too much Barricade 4FL Pre-Emergent Herbicide can cause undesired effects on your turfgrass and on the environment, and simply wasting your time and money.
You would just squeeze the bottle to get the needed amount into the measuring chamber on Barricade 4FL Pre-Emergent Herbicide Following the instructions for the "squeeze and pour" bottle in this video should help. It says for "insecticides", but it will work for this too.
As with any pre-emergent you do have to water in after application to get down into the soil to create the barrier. Per the product label: Weed control is most effective when Barricade 4FL is activated by at least 0.5 inch of rainfall or irrigation or shallow incorporation (1-2 inches) before weed seeds germinate and within 14 days following application.
You can typically apply a pre emergent such as Barricade 4FL Pre-Emergent Herbicide (Prodiamine) the same day or the following day as a fertilizer application as long as they do not have competing use instructions regarding watering in after treatment and they do not contain the same active ingredient as a pre-emergent.
You will need to use 0.5 – 1.1 oz of Barricade 4FL per 1,000 sq. ft. for ornamental type areas, the amount of water you will need depends on the amount of water it takes to irrigate that area. If you're unsure, you will need to calibrate your sprayer. Please read the product label for complete application instructions.
Yes, Barricade 4FL Pre-Emergent Herbicide can be applied to creeping juniper and other listed varieties of juniper as directed.
Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is labeled to apply prior to germination of common purslane and other listed weeds found here on page 14.
Yes, you are correct. As with most herbicides the exact volume of water is not very important, you just need to be sure you are getting the correct amount of product on a specific area, such as 1,000 sq. ft. What you are referring to on the label is the total amount of active ingredient that is in each gallon of product.
The active ingredient Prodiamine in Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is not labeled for sandburs.
Pre emergents containing the active ingredients Dithopyr (Dimension 2EW) or Pendamethalin (Pendulum 2G Herbicide) would be recommended for preventing sandburs from germinating.
The rate per acre for Barricade 4FL Pre-Emergent Herbicide (Prodiamine) depends on the turfgrass being treated. Please refer to the Rate Chart on page 13 of the product label for recommended rates per acre.
When applying Barricade 4FL Pre-Emergent Herbicide (Prodiamine) the wait time to seed or overseed would vary depending on the rate that was used. It can be anywhere between 4-12 months after the application. Please refer to the product label for the full chart.
Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is only a pre-emergent, used to prevent weeds from emerging. It will not kill anything that is actively growing. You will wait until the new lawn is established (mowed at least twice) before you apply Prodiamine. Blindside Herbicide WDG is a post-emergent that is safe to apply to established centipede grass to get rid of spurge.
Yes, Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is safe on fescue when used as directed on the product label.
