norwalk
ArboristSite Lurker
I made an awful mistake yesterday - I accidentally sprayed a non-specific herbicide the active ingredient of which is Prometon 2.5% (.25lb per gallon of active ingredient) under the "drip line" of several mature evergreen and deciduous trees.
Luckily I didn't use anywhere near full strength - the label says it covers 800 sq ft per gall & I used 1/2 gallon, spread over approx 2800 sq feet, diluted with a constant stream of water from the hose end sprayer as it was applied.
Several web sites I investigated talked about effective doses of Prometon being in the neighborhood of 10 - 60 lbs of active ingredient per acre. Since an acre is 43,560 sq ft and the lowest effective dose is 10 lbs, 1 lb would cover 4,356 sq ft. I covered approx. 65% of the area 1 lb should cover using approx. .12 lbs. So the minimum effective dose appears to be about .65 lbs and I used about .12 or about 1/5th the minimum effective dosage.
One web site talked about Prometon being applied at the rate of 1 lb per 100 sq ft to be effective against some weeds. I figure I applied .0042 lbs per 100 sq ft.
I spoke with a local arborist who didn't think the trees would be affected too badly and reccommended I spread ROOTS fertilizer (3-3-3) under the trees and on the area I sprayed and then some watchful waiting.
I'm very concerned about damaging these trees - anyone have any thoughts? The trees are a mix of evergreens & deciduous with trunks of approx 10-12" across.
Luckily I didn't use anywhere near full strength - the label says it covers 800 sq ft per gall & I used 1/2 gallon, spread over approx 2800 sq feet, diluted with a constant stream of water from the hose end sprayer as it was applied.
Several web sites I investigated talked about effective doses of Prometon being in the neighborhood of 10 - 60 lbs of active ingredient per acre. Since an acre is 43,560 sq ft and the lowest effective dose is 10 lbs, 1 lb would cover 4,356 sq ft. I covered approx. 65% of the area 1 lb should cover using approx. .12 lbs. So the minimum effective dose appears to be about .65 lbs and I used about .12 or about 1/5th the minimum effective dosage.
One web site talked about Prometon being applied at the rate of 1 lb per 100 sq ft to be effective against some weeds. I figure I applied .0042 lbs per 100 sq ft.
I spoke with a local arborist who didn't think the trees would be affected too badly and reccommended I spread ROOTS fertilizer (3-3-3) under the trees and on the area I sprayed and then some watchful waiting.
I'm very concerned about damaging these trees - anyone have any thoughts? The trees are a mix of evergreens & deciduous with trunks of approx 10-12" across.
