View Full Version : henbit not being killed

03-23-2004, 03:42 PM
new in the biz

sprayed several lawns and using trimec

sprayed henbit (some are 6 to 10 inches tall) it is not being killed after 2 weeks.

weather has been 40's at night to low 70's during the day

other weeds are being killed

using the dosage 2.5 pints per acre
sprayer calibrated at 2 gallons per minute
so 2.5 pints per 86 gallons

any ideas or help

03-23-2004, 03:51 PM
henbit can be stubburn, i'd up your rate of trimec.

you say you're doing 2.5 pints/acre?
if my math is correct thats 0.9oz per 1000sf
kick it up to 1.5oz per 1000sf, which is 4pints/acre?

03-23-2004, 04:13 PM
I am also new in Oklahoma. I am using Trimec at 4 pints per acre with 1quart of Surf King per acre. Also 4 pints of Pendimethalin per acre. Henbit is fried but it took a while on the February apps.

03-23-2004, 04:21 PM
also using 2 pints of surf king per acre
4.8 pints of pendimethalin

so i need to up the dosage

03-23-2004, 10:18 PM
henbit that is 10" is near flowering stage and has pretty much run its course. A lawn mower is the best prescription. You can hammer it with 1.5 oz of trimec and it will eventually die about the same time it is going to die out anyway. Simazine in nov. works wonders on henbit down south.

03-24-2004, 12:46 AM
If you hit it with about a pint and a half of roundup per acre and 2 to 3 oz. (and only 2 to 3 oz.) it will be killed in about two weeks. Plus i wouldn't up your surfking rate you only need a few ounces per acre unluss you are running large amounts of water per acre i.e. 50 or more. I agree with greener pastures, the november application of a preemergent like simazine will do more good than anything to stop it before it ever showes up. I also think that you are using plenty of pendulum, unless youare only making one pass peer year. hope my thoughs could help for what they are worth, good luck.

03-24-2004, 08:50 AM
after talking to the estes guy
I am going to cut the pendulum to 3.6 pints per acre so I can do a split app

and go to 4 pints of trimec until it the heat arrives

i agree on the simazine I sprayed my yard, mom's & mother-in-law's with it and what job it did. the only patches were where a bunch of leaves were piled up along the fence

03-24-2004, 12:35 PM
A little late in the season now but next year switch to ester formulation.