A couple weeks ago i brush hogg’d about 4 acres and immediately sprayed roundup. I plan on plowing, discing, then planting this weekend.
Just checked the plots today and there are tons of weeds and green shoots still coming up... probably because i mowed the plants just prior to spraying.
My question is whether I need to spray roundup again prior to broadcasting seed or will it not be a big deal since I am planning to plow and disc first..?
If I had more time, I’d just do it.. but it is going to be quite a crunch as it is..
Thanks for any input, Dan

I would suggest some type of herbicide prior to working ground/soil. Even if sprayed first by opening ground it is exposing seeds/ weeds but by spraying first it will limit weeds and/or competition for sun, minerals and water your wanting the crop you plant to utilize.

probably because i mowed the plants just prior to spraying.

Most likely that is the reason. It could be having no crop oil or non surfactant or not the correct mixture and/or not mixed satisfactory all of which can reduce the effectiveness. The problem with spraying after cutting is plants go dormant after cutting especially in summer months and grows new sprouts. The way to understand this is look at cutting trees and new growth, sprouts come from roots and stump. Thus the herbicide could not work it needs to be green and growing like those new sprouts you mentioned in your post, which are visible 2 weeks after cutting.

Hope this info helps but in the end it is your decision on how effective or what advantage you want for your seeds your planning on planting. Best of luck with your food plot.

 

After spraying it should be left alone time allow the herbicide to get to the roots and kill it. If you spray and miw you cut the the treated part from the root. Also, weeds and grasses are very adept at going dormant when stressed, this will delay transference of the killer juice. Some weeds and grasses can reproduce by broken pieces of root. Finally all soil that has be left fallow for some time will have a seed bank in the soil that has been built up by thousands of seed per plant for years. You won't get rid of that overnight

 

If its a food plot just do it! Many of the weeds that come up will be attractive to deer.

 

But it won't look like the picture on the bag

Plugger is correct.

 

After spraying it again, I would just disc and not plow. A good idea would be to get yourself a copy of Ed Spinazzola's book, "Ultimate Deer Food Plots" and follow his procedures. He's the most knowledgeable food plotter I have ever known.

 

A couple weeks ago i brush hogg’d about 4 acres and immediately sprayed roundup. I plan on plowing, discing, then planting this weekend.
............

Curious why you would plow. When you ran the brush hog were there a lot of bushes/saplings in the field and you want to turn the root systems ?

L & O

 

Thanks for the replies everyone. The reason for plowing is that I did hog quite a few Autumn Olive, and when I tried the disc earlier in the year for Egyptian Wheat, the disc seemed to barely be scratching the surface with weights and my brother standing on it..

I’m thinking I’ll do a real quick job with the roundup again and shoot for getting at least half of the plot. The rest will just be more browse variety as mentioned above.

Thanks again

 

I would mow it as close to the ground as possible. That will make it easier to disc. Also, if you can disc after it rains, when the ground is moist, it will be easier to disc. You can also disc in one direction, then disc 90 degrees to the first direction. This will help to break up the ground better.