Re: Spraying roundup on beans

Posted by fixerupper on June 12, 2015 at 11:11:47 from (100.42.82.100):

In Reply to: Spraying roundup on beans posted by jon f mn on June 12, 2015 at 09:50:22:

There is a liquid product called Optima that can be used in place of AMS. For me it's easier using Optima than lugging around bags of AMS, but each has it's advantages. Optima is added at the rate of 5oz per acre so for me it's costing $2.90/A for Optima. That cost will vary of course. Get those weeds when they are small when you use Roundup, 2" or maybe a little bigger but if the waterhemp gets any bigger than that you might not get the resistant ones. I have 80 acres I planted without a preplant residual. I have sprayed them with Roundup (32 oz/$6.75 per Acre each time) twice already. First time I sprayed the temperature was around 60 which is a little cool for the weeds to be active, but rain was in the forecast (imagine that!) I killed some and made the rest mighty sick but they never did die, just stayed yellow. A couple of days ago I sprayed them again because the new flush of weeds was coming on strong and they were in the 2" stage. Temp was in the high 80's, perfect temp. This is a field that has some resistant waterhemp from me letting the weeds get too big before I sprayed them in the past. The rest of my beans have Authority First sprayed preplant during burndown and those beans are mostly clean except for where it drowned out last year. Now I'm kicking myself for not taking the hour and a half to spray a Roundup burndown with a residual like Authority before I planted.

We can't procrastinate and wait till every weed has come up to spray. The taller ones will be too mature. It's a new ballgame now that weeds are learning how to survive Roundup. There is an old post emerge herbicide called 'corn knife', the kind you swing with your hand and arm but I don't want to go back to those days. LOL

Edit, just read our second post about it being former sod for 40 years. You won't have to worry about resistant weeds this time. Roundup will do a good job of burning the volunteer grass at 32 oz/A

This post was edited by fixerupper at 11:17:03 06/12/15.

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