Setting up sprayer need help

Systemic means the spray gets absorbed & flows through the plant, including the roots, and generally kills the whole plant, roots & all.

Contact sort of has 2 meanings - I've heard it used for Roundup used with a wick applicator - you contact only the weeds with the herbicide....

But generally it means a spray that kills the parts of the plant it contacts - not for sure the roots, or othar parts of the plant.

You would _have_ to list the crop for us to say what herbicides work for it!

Glysophate (active ingredient in Roundup, etc.) kills most anything green & growing that it contacts, unless it is a gmo crop engineered with gene insertion tonot be affected by glysophate.

2,4D comes in 2 flavors - basically oil based or water based - and will kill most broad leafed (not a grass) plants. And can also be very hard on grasses if applied at the wrong time - such as corn, if you apply it after the growing point leaves the ground.

--->Paul

Also the last sentence in your post says volumes. These chemicals need to be handled with due care. They weren't in times past and some people are now suffering for it. I think the people who don't either didn't get exposed as much or are somewhat more resistant.

I love the city types that rant and rave about farmers wrecking the water. Then they want to use all sorts of stuff on their lawn. You ask them what rate and what the product is and they get a blank look on their face. Then ask them if they are licensed applicators!!!!! Love to do that:-)

Have a good weekend

jt

K-Mo

That being said 2 4D and Roundup can be handled with the same rig depending on what you intend to do.

Usually Roundup requires a low drift nozzle of some sort. I use TurboTeeJet's. As to nozzle selection there are a bunch of variables that figure into that formula. Spacing, spraying speed, Pressure, and nozzle size. Might want to go to a local farm supply store and pick up a "Spraying Systems" catalog I think TeeJet puts this one out. It will have charts That will help with nozzle selection. Flat fans were the old all purpose tip and your sprayer probably has those unless it has been used for Roundup on beans.

Your question about herbicide selection is kind of open ended ie need a little more info. What weeds are you trying to kill? What crop are you working in? Is the crop Roundup Resistant? It is too late for 24D in corn here but if you use it before you spray any broad leaf crop (like beans or alfalfa) Clean the sprayer real good and use a neutralizer or you will hate yourself. Just a whiff of that stuff will kill Alfalfa.

The difference between Contact and Systemic is the method that the herbicide acts on the plant. Systemic will move throughout the plant and Contact will kill the parts that it gets on.

I would suggest you get your self licensed as a private applicater next winter. You won't need a license for the products you mentioned but you will learn about safe handling get answers to most of the questions you asked while studying for the test. Test is not super difficult (I passed it!!).

Hope this answers some of your questions and sorry about the long post.

JT