| Many of the residual herbicides such as simazine can normally be applied directly over trees at any time with no expected damage to the foliage. |
| To reduce or eliminate this problem, use no more than 1.6 pounds active per acre of atrazine or simazine the year before planting soybeans. |
| Atrazine and simazine are corn herbicides used by growers worldwide. |
| Bioassays with lettuce and cucumber seedlings showed that simazine, a triazine herbicide related to atrazine, can persist in soils and cause subsequent replanting problems. |
