Quinclorac 75 DF should be applied when the ground is not frozen and rainfall/snow is not expected for more than 24 hrs. You want to treat when the weeds when they are actively growing for the best results. We recommend to make the application in the cooler times of the day also when temps are between 65-80 degrees.
Quinclorac 75 DF can be tank mixed with pre-emergents such as Prodiamine as long as rates for each product are followed. We do recommend that you do a jar test to ensure proper mixing before adding to your tank, and also that you add a surfactant for the Quinclorac to be more effective
When Quinclorac 75 DF is applied can vary depending on the target weed as directed on the product label. Retreatment intervals can be 14-21 days. Keep in mind that post-emergent herbicides will work best when the target weeds are young and actively growing. Quinclorac is only a post-emergent herbicide, so it doese not prevent any new weeds from germinating.
We would recommend to seed and then wait 28 days to apply Quinclorac 75 DF
When using Quinclorac 75 DF you would want to use a methylated seed oil surfactant like Prime Source Duo Stick.
The amount of time you will need to wait to reseed after applying Quinclorac 75 DF will depend on the type of seed you are using. Please refer to the seeding chart on p. 11 of the product label for specific timing.
Quinclorac 75 DF is safe to use on bermuda as directed on the product label.
Quinclorac 75 DF is a post-emergent herbicide, so the best time to apply it is when the target weeds are actively growing. If you are targeting crabgrass, then it is best to treat in late spring/early summer when the crabgrass is still small, or later in the summer or early fall when the grass has resumed growing again. You want to be cautious about broadcast applications of this or other post-emergent herbicides during the hottest parts of the summer: the desirable turf will be under more stress from the heat and the target weeds will not be growing much. You can broadcast or spot treat with Quinclorac at labeled application rates.
Quinclorac 75 DF needs to time to be absorbed through the weeds and you do not want the weeds to be stressed from mowing or it will not be effectively absorbed. You need to apply at least 2 days before mowing or wait 2 days after application to mow.
Quinclorac 75 DF lists on the product label that centipede grass is susceptible to damage if applied so it would not be recommended.
No, quinclorac products are not labeled for use on St Augustine. This is a very sensitive turf type and quinclorac may harm it. Instead you can use a product like Image Kills Nutsedge or Atrazine for small lawns, or Blindside for larger areas.
There is not a specific amount of time you need to wait to apply your fertilizer after applying Quinclorac 75 DF. Since Quinclorac works best when it has at least 24 hours to dry after application, then waiting at least 1 day before watering or applying a liquid fertilizer would be advantageous.
Quinclorac 75 DF is mixed at the rate of 0.367 oz per 1000 sq. ft. in 1-2 gallons of water for broadcast or spot treatment per the product label. The use of a methylated seed oil surfactant is recommended rather than a nonionic surfactant. Duo Stick Select would be a better choice than the Hi Yield Spreader Sticker. The rate would be 0.55 oz per 1000 sq. ft.
Quinclorac 75 DF should not be applied to exposed feeder roots of trees, ornamentals or within the dripline of trees and other ornamental species.
Quinclorac 75 DF is not labeled for torpedo grass. However, Drive XLR8 would be a better option.
When using Quinclorac 75 DF, optimal control may not be achieved when treating crabgrass at the 2-4 tiller stage. Sequential applications may be necessary when treating during that stage. For best results, you should use a methylated seed oil with the Quinclorac 75 DF either before the 2nd tiller stage, or on mature crabgrass. The amount of time you will need to wait to reseed after applying Quinclorac 75 DF will depend on the type of seed you are using. Please refer to the seeding chart on p. 11 of the product label for specific timing.
Quinclorac 75 DF is not recommended to be used in a hose end sprayer. For best results, a hand-pump or backpck sprayer should be used.
Quinclorac 75 DF is not labeled for barnyard grass. Q4 would be a good option but the turf needs to be established, which means it needs to be mowed twice before applying or be at least 4 weeks since seeding.
Quinclorac 75 DF is a water dispersable granule. Quinclorac 1.5L is a liquid. Both have the same active ingredient. Both require the addition of a methylated seed oil surfactant such as Duo Stick Select for best results. Both will control foxtail.
It is recommended not to mow within 2 days before or 2 days after applying Quinclorac 75 DF.
