تأثير بعض المبيدات الجهازية في نمو نبات السعد (Cyperus rotundus L.)‎

الملخص EN

The factorial pot experiment was conducted in order to investigate the effect of some systemic herbicides (Topik 60, Focus ultra 300, Fusaltat 66 and Glyphosate 930 cm3 a.i / ha) and unweeded check treatment when it applied Tween 20 (for wax removing from leaves)on growth and production of tubers of purple nutsedge (Cyperus rotundus L.) in summer season 2005 at Agric and Forestry college, Mosul univ.

Data were collected after 107 day of sowing tubers.

The significant result indicate that Glyphosate had more efficiency for reduce plant growth by reducing dry weight of roots, number, weight and size of tubers up to 49.2, 52.5 and 63.6 %, respectively comparison with check treatment, while Focus ultra herbicide had increased number ,weight and size of nutsedge tubers up to 50, 24 and 29 %,respectively.

Others herbicides had less effectiveness.

However the wax on the nutsedge leaves did not effect on herbicides absorption and toxicity of the plants.

Therefore insignificant result had seen when it used material for wax removal (T20).

There was positive correlation between shoot growth (number of leaves and branches) number, weight and size of new formation tubers, while number of tuber have negative correlation with weight of new tubers.