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the use of liq. amonium nitrate as herbicide

Don Staples dstaples at livingston.net
Tue Jan 27 09:09:15 EST 1998

hovav wrote:
> It is a common practice in agricultury in israel to use this salt in high
> concentration as  foliar contact herbicide substituting the use of other
> foliar herbicides.
> I will appriciate comments on this , aspecialy on comperativ environmental
> effects.
> thanks hovav

We call it Amate in the US, it has been used extensively in control of
vegetation on high lines, yet has fallen from favore to be replaced with
mechanical pruning.  the material can be very selectively applied.  I
once did the ground work in a study to see the effects of amate on
trees, grasses and understory plants when applied by a mist blower that
sprayed an inverted oil/water/amate emulsion along power line rights of
way.  The machine could accurately place the mist to 120 feet height. 
There was a little "buck shot" damage to lower vegetation, yet little
real damage in our thick east Texas piney woods.  You can effectively
prune a tree with the amate, with no long term damage to the tree.

Apparently, the material breaks down rapidly upon contact with soil. 
Improper applications was the cause of nearly all cases of adverse
enviromental effects.  

One side note, we found that the oleoresin pressures on trees treated
with amate showed a short term raise, this increase in pressure seemed
to have reduced the number of attacks by bark beetles in trees treated.

Largest drawback was the association of any herbicide applied by such
means and overspray on surrounding plants/streams.

Don Staples

My Ego Stroke:  http://www.livingston.net/dstaples/

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