HERBICIDE
                 DAMAGE
 

Herbicide damage to plants very often resemble disease

infection and nutritional damage.

Therefore, it is useful to have on-hand descriptions and

 pictorial illustrations of what herbicide injuries look like.

Here are a few good web sites on herbicide
injury.

 

http://extension.agron.iastate.edu/soybean/documents
/herbicideinjury_05.pdf

This site has an easy to understand diagrammatic
and pictorial key to help you identify which herbicide caused the injury. There are good pictures of symptoms.

 

http://foragesoftexas.tamu.edu/pdf/hermode.pdf

has good descriptions of the type of injury based
on the kind or class of herbicide.

 

http://wric.ucdavis.edu/information/herbicideinjury
/herbicideinjury.html

Here the type of injury is divided into seven main
groups based on the mode of action of each group of herbicide.
 

http://gardenline.usask.ca/misc/symptoms.html

has symptoms of specific herbicide injury to plants.