How long does Glyphosate take?

[LB1]

What concentration do y'all normally spray corn?

[Rem11-87]

I think i normally spray 1.5 quart an acre of the 41 % on the corn. Grass is usually small

When the grass and coffee weeds are taller in my dove field. I spray 2 an acre over the sunflowers, when flowers are dry.

[rrconductor]

I spray 74% gly and a shot of Crossbow and it will turn brown and wilt on a very hot day in 3 hours.

[Palmetto Bug]

Just a report back from the original post:

The grassy area under the powerlines was pretty dead and brown. Apparently, four hours was enough time to uptake the chemicals before the deluge of rain. I'm going to disc a break around it and burn it before discing the whole plot. Thanks for all the replies.

[ProvidenceSwamper]

Here is a handy table on rainfast times of common herbicides.

https://craven.ces.ncsu.edu/wp-conte...012.pdf?fwd=no