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Post by kenmb on Sept 5, 2020 7:54:17 GMT -6
One of the things on my to do list is some post harvest spraying this fall. Lots of issues with Canada thistle and annual sow thistle in my peas and yellow mustard. Not much for perennial sow thistle.
I swathed the yellow mustard because it was so weedy but also with the mind to allow for good regrowth for a fall spray application so should be in good shape to do that. Swathed it a couple weeks ago and combining now so will just be a matter of timing a spray around weather/growing conditions.
The peas got 440g/ac of glyphosate at 10 GPA pre harvest. Starting to think a heavier rate may have been a good idea. So open to suggestions on whether a post harvest spray is a good idea there too. Canada thistle was really bad so a second application in fall would not be off the table if it meant better results for the next few years. Barley goes on the peas next year.
So, post harvest, I have done some in years past for grass control with around 400 g/ac in early October and got good results. But if targeting heavy Canada thistle pressure (like areas 40' round with more thistle than crop) does a guy go with a stronger mix yet, and what would be a good tank mix partner? Sow thistle completely choked out the mustard in low areas, no mustard to be seen - 100% dense 5' tall sow thistle.
My yellow mustard stubble is a priority, peas go on that next year. But would consider a second hit on the peas stubble as I would prefer not waiting till next year to have someone say that a second pass this fall would have been very effective.
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Post by Beerwiser on Sept 5, 2020 10:18:15 GMT -6
Depending on your crop rotation for next year Express pro is a great tank mix for fall perennial broadleaf plants. Next would be just Express sg if the residue on the pro will mess with your rotation(next years peas/canola). Ideally if you can wait for a touch of frost or damn close is great for for Canada thistle and dandelion. Annual sow is a spring hit so don't prioritize on the annual plants.
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Post by kenmb on Sept 6, 2020 8:28:49 GMT -6
Express is one of the things I am considering for peas next year. Figured I would post without mentioning it so as not to try and steer the discussion. One of the versions is not recommended for our sandy soil so have to check my notes or talk with local agronomist on it. The annual sow thistle I am wondering if there is something with a residual to help with control for a few weeks in spring, or help thin the seed bank this fall somehow. Don't know, just wondering. The crop production handbook helps a lot but does not aid in figuring which chemicals are particularly effective on which weeds in the spectrum listed. So looking for any other experiences before talking with my local chemical reps.
I found a publication that said Banvel at 0.5l/ac with 360g of glyphosate is very good on Canadian thistle post harvest. Also mentioned dicamba but didn't note a rate.
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Post by Beerwiser on Sept 6, 2020 11:17:35 GMT -6
The pro is the one that has the issue with sandy soils. Most of the reason is leaching if you got a high water table. Are you greater then 40% sand? Banvel is dicamba and will work good too although not as well as Express IMO. It boils down to price per acre at this point. I have no idea on banvel, but SG is just under 4.50/ac. With your sow, off the top of my head anything that will have any residual is going to mess with next year's rotation. What you need is some chlorsulfuron. See if anyone remembers that one.
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jaymo
Full Member
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Post by jaymo on Sept 6, 2020 14:21:47 GMT -6
I've left part of field sprayed with just glyphosate vs glyph/expressSG. Early next spring it all looked nice and tidy but later into June spraying in crop herbicide could see the area sprayed with just glyphosate definitely had more dandelion and sow thistle starting to pop up again.
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Post by kenmb on Sept 9, 2020 8:06:38 GMT -6
I got the dicamba/banvel thing sorted out. Always thought they were both trade names but never had cause to look into it before. Will talk with my chem retailer this week and see what they have to say. What I have been seeing is sow thistle keeps coming through out the season. Hopefully it's thinning out now. All our drowned out areas from 2010-2016 that couldn't be farmed but are now seed able in 2018,19 and 20 have had large flushes of sow thistle. This year, even in the ditches that were full of water years ago had a lot of sow growing in the grass. Had pretty clean barley crop last year, thought I had the sow thistle beat, but mustard there this year showed me otherwise. So that is on my mind for what may come next year. And Viper in my peas this year didn't get the sow thistle, could have been lack of rain that didn't get an early flush of weed growth before spraying.
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Post by torriem on Sept 9, 2020 8:26:57 GMT -6
I found a publication that said Banvel at 0.5l/ac with 360g of glyphosate is very good on Canadian thistle post harvest. Also mentioned dicamba but didn't note a rate. Banvel is dicamba. Compare the grams/l to get the equivalent rate. 0.5 l/ac Oracle dicamba is 240 g/ac. |
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Post by kenmb on Sept 10, 2020 7:44:49 GMT -6
So Express Sg was the first thing my local retailer suggested for peas next year at $4/ac. We had talked about it before so no surprise. Since that product keeps coming up it looks like I will use that this fall on my mustard stubble with around 450g/ac glyphosate and 5 GPA water.
Hitting my pea stubble again is still an option. The 440g/ac glyphosate preharvest may benefit from another pass this fall. Distinct (dicamba) was suggested at $4.25/ac and requires Merge with the glyphosate so pushing up to $5/ac, Prepass is another option at $4 ac. Thinking something with dicamba is probably my better choice for fall spraying. Would go 450g glyphosate there too, barley seeded there next year. I could always spray Prepass or some other product in spring if I want. But seems to me dicamba is kind of a fall only use for best results.
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Post by Oatking on Sept 17, 2020 21:27:34 GMT -6
Hey Kenmb, just a quick question, I have found out it is very important to use good water for in crop or fall spraying. Hard water can lessen the effectiveness so if rural water is near by it can improve glyphosate effectiveness. Some research has showed reverse osmosis water is very effective for decreasing herbicide amounts and improve weed control. search the web for the results, or I ll try and get a link. reverse osmosis seems far fetched but something to think about.
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Post by kenmb on Sept 18, 2020 7:53:59 GMT -6
I am pretty convinced of that. Has been a big issue for me last few years. Looked into RO systems but didn't do it. Being a small farmer, I collect a good portion of my needs via rain water off the shed roofs and into tanks. Have 4500 gal of storage and 1" of rain gets me 1000 to 1300 gallons roughly. So an inch or two in spring plus snow melt off roofs gets me set up ok. But haven't had spring rain last few years and no sloughs to pump out of so have a well on farm at 750 grains hardness and dug out a couple miles away at same hardness. Being using AMS as recommended (60l into 1200 gal I am told) but don't think it is as good as rain water. RO would be comparable to rain water.
I had about 1200 gallons of rain water and hauled 1200 gal from a community well that is fairly soft (but no test data) this week and mixed that to spray with. Water has been an issue here. Don't know how the wildlife is doing it. On 10 quarters I have that one dug out with water and it is probably close to running dry again. Sprayed through a slough the other day that I have never driven anything through in my lifetime. The last bit of ground that would have been close to being moist.
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