Big Blog Of Gardening has been reporting on DuPont ’s tree diagram - killingweed sea wolf Imprelissince problem start in July 2011 . Hard to believe , but as of this date , few tree diagram owners have received settlement checkseven months after they thought they had resolved their title with DuPont .

Imprelis’ residual chemical action

This year , many homeowners are seeing newdamage to treesmore than one twelvemonth after Imprelis was go for . The dynamic chemical substance , aminocyclopyrachlor ,   does not break down in the soil in the same means as other chemical substance weed killer do – aminocyclopyrachlorrequires ultraviolet light and bacteria to use up aside at it . If sun and bacteria ca n’t act on it ( like if it ’s below the surface in chemically fertilized soil which has destroyed the bacteria ) , when new rains fall , the lying - in - wait Imprelis is pushed deeper into the soil where it finds ornamental works root systems to attack .

Twenty - two states , from Kansas to Pennsylvania , initially reported damages to trees and ornamental plants . Coincidentally , many of these state had higher - than - have a bun in the oven rainfall last give . Imprelis had n’t had time to break down , was moved along by rain , and found Sir Herbert Beerbohm Tree roots that attacked deep in the soil .   damage tree diagram late added to the list are willow and poplars .

From the University Of Minnesota Extension ( link has been removed from UMN website):“Imprelis does not attach well to grease subatomic particle and is a very water - soluble compound … Because it is alive over a long period of metre in soils and because its low surface assimilation and high solubility permit it to move downward in soil , … Imprelis was able to reach the radical system of ornamental plants , … and injury happen . It is still not known why particular spruce and pine metal money are so susceptible to Imprelis . ”

If the Imprelis problem was in my cubic yard , I would be very untrusting of engraft novel tree in the same area as the discredited or beat trees . When the Imprelis - damaged trees are toil up , and the soil is commove , that action may stir the still - combat-ready Imprelis down toward the roots of the novel trees and nearby plants . The young tree and plants could be damaged by Imprelis , initiate the whole aggravating process over again .

FromMichigan State University ’s Extension Service : “ Where … trees were kill or badly damaged … it is less open that it will be safe to plant this spring . DuPont conducted a study in which they planted cotton , soybeans , and sunflowers in field of study   one yr after   Imprelis coating and found that answer varied from no plant damage to plant dying . ”

As homeowner grow more irritated with DuPont ’s delayed resolution appendage and legal firms become more aggressive in raise them , it ’s estimated that DuPont ’s Imprelis financial obligation may rocket from the Wall Street estimation of 1 billion one dollar bill to 3 to 4 billion . In fact,29 new lawsuitswere file in February 2012 in Wisconsin .

and

“ This time Dupont wo n’t be capable to background this Imprelis mess because it damage the properties of a wide range of professionals who are look to see if Dupont makes unspoiled on their vows of compensation . These dimension possessor are lawmakers , jurist , attorneys , tv producers , medium news pro and others who will not allow this go unnoticed by the public or Dupont shareholders if they are not satisfied … ”

If your trees are damaged by Imprelis , if an adjoining attribute has trees damaged by Imprelis , or if you live on or near a prop treated with Imprelis last outflow ( even if no trees are damaged ) , do not employ lawn press clipping , tree or shrub debris as compost . Lingering Imprelis may be present in yard waste and may make damage to the flora you treat with this compost . This warning is clearly submit on the Imprelis label bring out by DuPont ( except for the tree damage part ) .