If poisonous weeds or poisonous woody plants are known to occur in 

 pastures or on rangelands, remove the livestock from the area for at 

 least 30 days after treatment. Several herbicides, including 2,4-D, 

 2,4,5-T, and MCPA, are known to produce marked changes in the chemi- 

 cal composition of treated plants. There also is evidence that some 

 herbicides affect the palatability of certain plants and that livestock 

 will eat some treated species that they normally would not eat. 



- 36 



