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Old 10-21-2013, 03:34 PM
gregory gregory is offline
LawnSite Bronze Member
Join Date: May 2007
Location: southwest florida
Posts: 1,065
Originally Posted by Skipster View Post
I think I might look more at application technique, tank mix, and carrier volume than excessive absorption. Research has shown us that equipment traffic (even in excess of 5000 pounds) does very little to wound grass plants, even when turning, as long as the plants aren't ripped out of the ground. Aside from that, numerous studies hav ealso shown that herbicide uptake is decreased during plant wounding, not increased. The Dismiss label warns against applying to mechanically damaged turf because of the reduced recuperative ability, not because of increased uptake.

If you're seeing damage from sulfentrazone applications, check theses things:

1) Application technique and rate -- its easy to double or quadruple your desired application with just a small overlap

2) Tank mix -- any type of soluble fert or adjuvant in the tank will enhance the phytotoxicity response from sulfentrazone

3) Carrier volume -- Dismiss label specifies carrier volumes in LV applications to be no less than 0.5 gal/M. A lot of guys run 0.25 gal/M. That leaves a concentrated droplet on the leaf surface and can cause some damage.

I've seen thousands of sulfentrazone applications from ULV applicators and usualyl don't see any damage at all. The case I've seen the most is from improper mixing and application. I don't have to tell anyone here, but we all know how important that math calculation is when mixing and loading.
i would think you are right if it only didnt happen where the tire tracks were.. i can understand if the whole yard looked bad after i applied but like i posted it only happens where the tire tracks are.. i would think the tires would be the cause of this..not my math..
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