Help - joint grass(?)or pop grass(?)creeping out into field

andy r · Apr 22, 2020

I am not completely sure of the name of this weed. I really do not think it is joint grass or pop weed, but people might call it that. When you pull the stem it separates from the lower stem and on and on. It is like a hollow straw. Dark green color. Diameter of the stem might be 3/16 inch possibility up to 1/4 inch. It is growing at the edge of the field and seems to be creeping in a foot or two each year. This is a no-till field that gets traditional herbicides including roundup, but it doesn't seem to slow this weed down. I think tillage or cultivation might kill it or at least slow it down. Probably has an underground root system. What do you call it and what will help stop it? Thanks.

Janicholson · Apr 22, 2020

Casoron provides preemergence control. According to the PNW Handbook, Casoron applied in three consecutive years at rates of 4, 3, and 2 lb ai/acre suppressed horsetail From Weed management home page.

really an ancient type of plant more like a fern than a seeded plant. Tough to kill because it doesn't fit the genetics of common weeds. Jim
wiki reference

cjunrau · Apr 23, 2020

It is called elephant grass here. I would run a 3 point cultivator or disc around the field. Do that 1-2 years every spring. Probably get rid of it. I don?t think there are many chemicals that kill it. Seems to grow where the ground doesn?t get worked.

big jt · Apr 23, 2020

I call it joint grass also. Have a small patch on one farm in a wet spot. Get out of the wet spot and that stuff stops. Just doesn't like dry feet.

I haven't found a chemical program that really touches it yet.

jt

David Snipes · Apr 23, 2020

If it is equisetum, the only thing that I've found that kills it is Telar. It's extremely expensive but you don't need much. You can get it from an ag chemical outlet in small vials of powder to mix with water and surfactant. 24D will burn it down but not kill it. It is round up resistant. It actually looks like a relative of equisetum, but I can't remember the name of it, but it reacts the same way to the herbicides.

Aaron SEIA · Apr 23, 2020

Scouring Rush is what it's called around here. Darn tough stuff.
AaronSEIA

Mac AR · Apr 23, 2020

Plow it under. I had some in a low place that spray wouldn't kill, and I tried a couple different chemicals. I plowed them under 2 years in a row, and the third year they stayed under. If its just a field edge, a little plowing wouldn't hurt. A disk or field cultivator might do just as good too.

Mac

Help - joint grass(?)or pop grass(?)creeping out into field

andy r

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Janicholson

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cjunrau

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big jt

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David Snipes

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Aaron SEIA

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Mac AR

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