The influence of herbicides on major field crops in the newly reclaimed areas of egypt part 1 effect of preemergence application of herbicides on rice cotton maize and wheat seedling growth

Shaalan, M.I.; El-Khishen, A.A.

Libyan Journal of Agriculture 6(1): 193-202

1977


Accession: 006697624

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Abstract
Atrazine, linuron, 2,4-D, trifluralin, fluometuron, molinate and propanil were tested. Wheat seedlings were sensitive to all herbicides at all concentrations except 2,4-D at the rates of 0.5 and 1.0 l/f(f = faddan = 4200 m2). 2,4-D could be applied as a preemergence treatment to control weeds in wheat at the rate of 1.0 l/f. Trifluralin and fluometuron did not injure cotton seedlings up to the rates of 1.0 l/f and 1.5-2.0 kg/f, respectively. However, the other herbicides killed cotton seedlings, especially at the higher concentrations. Trifluralin and fluometuron might be applied as a preemergence treatment to control weeds in cotton at 1.0 l/f and 1.5-2.0 kg/f. Trifluralin, molinate, propanil and 2,4-D were effective at rates of 1.0, 2.5, 6.0 and 1.0 l/f, respectively, and atrazine at the concentration, 1.0 kg/f. Rice seedlings were killed by the highest rates of these herbicides. The seedlings were seriously injured by fluometuron and linuron, especially at higher concentrations. Maize seedlings were very sensitive to all herbicides at all concentrations, except linuron, atrazine and 2,4-D up to 1.0 kg/f, 1.0 kg/f and 1.0 l/f, respectively. These latter herbicides and concentrations might be safely applied as preemergence treatments to control weeds in maize.