Abstract:

This study evaluated the effect of 2,4-D on water content of shoot and root of mesquite seedlings, which raised from seeds collected from trees treated during the flowering stagewith various weights of 2,4-D (6, 12, 18, and 24 grams a.i.), dissolved in either diesel or water. The results showed that seedlings grown from seeds collected from different tree sizes treated with 12. 18, and 24 grams a.i dissolved in diesel, and those treated with 24 grams a.i dissolved in water exhibited a significant decrease in shoot water content compared to the control group. Additionally, the root water content of seedlings from seeds collected from trees treated with 18 and 24 grams a.i. of 2,4-D dissolved in either diesel or water also showed a significant decrease compared to the control. Overall, the study demonstrated a reduction in water content of seedlings raisedfrom seeds of mesquite trees treated with 2,4-D.This reduction in water content weakened the establishment of the seedlings and ultimately led to their death in the early stages