اداء مبيدات مختلفة لمكافحة الأدغال المرافقة لمحصول الذرة الصفراء ( Zea mays L. )‎

الملخص EN

Field experiment was carried out in the growing season 2018 at Rashedai field in Nineveh provancy to determine the perform of ( pre_ planting herbicides Glyphosate 6.4 L/ ha , Gramaxon 2.8 L/ha and pre_ emergence Pendimethalin and Guardian at 2 , 4 , 6 L/ ha for each herbicide ) on weed control in Corn crop under different time of planting ( Spring and Fall season ) .

The results showed that weeds strongly effect on Corn crop especially perenual weeds which reduced seed yield .

Glyphosate and Gramaxon were significantly reduced dry weight of weeds which reached up to 32.8 % , 20.2 % with weeded treatment respectively .

Also they increased .

ear length , number of grain yield and biological yield especially with Glyphosate herbicide .

Pre_ emerges herbicide ( Guardian at 6 L/ha ) had superior than Pendimethalin and weeded treatment in ear length , grain yield / plant and grin yield ( kg/ha ) .

Grain yield was higher in fall than in spring season while weed dry weight and biological yield were decreased .

The pest grin yield noticed with interaction of Guardian 6L/ha in the fall season which treatment with Glyphosate .