2,4-D
2,4-D (various names) is a broadleaf contact herbicide that will not control grasses. It is particularly useful for controlling perennial weeds. It should not be applied to bare ground or under hot dry conditions. DO NOT use ester formulations of 2,4-D because they are extremely volatile and could vaporize and damage surrounding nontarget vegetation. Use with extreme caution if grapes or Solanaceous vegetable crops are in the immediate vicinity. Not recommended if the area to be treated contains a domestic well field.