Corn. Again. (Long post)

[N80]

If you use regular round-up, how long do you have to wait before planting?

 

[Luremaker]

My neighbor plants his sweet corn then sprays roundup with 2,4-d right after his corn is planted and before the corn has had a chance to sprout to knock down all the sprouted weeds.

My "Guide to Weed Control" lists Princep Nine-T, Simadex, atrazine and Simazine 480 (and others) as approved soil (for use in Ontario) applied grass and broad-leaf herbicides for sweet corn.

This entire publication is available as a free download in pdf format. Each chapter is a separate pdf file.

Publication 75, Guide to Weed Control

Chapter on Field and Sweet Corn (pdf)

http://www.omafra.gov.on.ca/english/crops/pub75/chapter9.pdf

 

[charlz]

When the corn gets up about 8 inches or so you can spray with 2,4,d to control broadleaf weeds. Problem is I mostly have grassy weeds.

In other threads on here I have seen Prowl recommended as a pre-emergent you put down right after the corn pops up. From the research I did there are at least two different Prowl's, one is labeled for sweet corn and the other is not so if you try it make sure you get the right one. I have not been able to find it locally with a casual look through the farm stores so have not tried it yet.

 

[charlz]

Stupid question, a while back I bought a really nice push spreader for my yard and it has rusted to peices in no time. It is kept indoors and never really gets wet. Is lime really corrosive? If so, I really don't want to put it in my new 3 pt spreader.

'Agricultural' lime isn't, it is just ground limestone or chalk. This is mostly what you get when getting 'lime'.

'Burnt' or 'quick' lime is caustic.

 

[Luremaker]

When the corn gets up about 8 inches or so you can spray with 2,4,d to control broadleaf weeds. Problem is I mostly have grassy weeds....

In Ontario 2,4-d is not approved for use on post-emergence sweet corn. Prowl is not approved for use pr-emergence on sweet. If they are not approved here they may not be approved for use on sweet corn elsewhere.

 

[charlz]

In Ontario 2,4-d is not approved for use on post-emergence sweet corn. Prowl is not approved for use pr-emergence on sweet. If they are not approved here they may not be approved for use on sweet corn elsewhere.

Is 2,4-d use restricted in general in the province? It is not here in Idaho but I know it is restricted or possibly banned in other states.

 

[Luremaker]

Is 2,4-d use restricted in general in the province? It is not here in Idaho but I know it is restricted or possibly banned in other states.

2,4-d has few restrictions in Ontario from a farming standpoint if the farmer has an applicator's license which is easy enough to get. There are, however, restrictions on which crops you may apply it on and when you may apply it. There must be reasons why it is not approved for use on sweet corn and seed corn but is approved for use on field corn.

2,4-d is on the list of banned herbicides for residential use in Ontario.