المعالجة المغناطيسية لمحلول رش مبيد Glyphosate و أثرها في كفاءة مكافحة الحلفا لتقليل التلوث البيئي

الملخص EN

An experiment was conducted during summer season of 2011and 2012, in the experimental farm, Department of Field Crops, College of Agriculture-University of Baghdad on cogon grass infested area for many years, according to the randomized complete block design with three replicates, to investigate the effect of magnetized spray solutions of glyphosate for improvement of control reducing herbicides rates.

The study included two factors, the first with four levels of magnetized spray solutions [0 (normal water), 500, 1000 and 2000 Gs.], and the second factor included four levels of glyphosate 48 % [0, 50 %, 75 % and 100 %] of the recommended rate (12L.ha-1).

The results showed that 100 % of recommended herbicides rate achieved highest injury score in 2011 with magnetized spray solution of 1000 Gs gave 4.93 and 4.67 with magnetized spray solution of 2000 Gs.

in 2012.

Magnetization of spray solution also reduced shoots no.

With 14.90 shoot.0.25 m-2 for magnetized spray solution of 500 Gs.

with 100 % herbicide rate in 2011 and 15.90 shoot.0.25m-2 for magnetized spray solution of 1000 Gs.

with the same herbicide rate in 2012.

Similarity lowest no.

of rhizomes were recorded with magnetization of the spray solution of 2000 Gs.

with 100 % of recommended herbicide rate which gave 12.33 rhizom.0.25 m-2 in 2011 and 9.22 rhizom.0.25m-2 for 1000 Gs.

in 2012.

Also lowest percentage of rhizome bud viability was obtained with spray solution of 2000 Gs.

with 100 % of the recommended herbicide rate, which gave 2.33 % and 3.33 %.

From the present study conclusion in could be draw that there was possibility of improving the efficiency of lower rates of Glyphosate for cogongrass control, 75 % of the recommended rate herbicide with magnetization of the spray solution of 1000 and 2000 Gs.

gave similar effect of 100 % of the recommended herbicide rate when added with normal water spray solution and contributed highest effect on most of characters studies and this indicted that magnetization of spray solutions may led to increase efficiency of lower herbicide rates equal to higher rates with normal water spray solution minimizing the environmental pollution caused by the use of higher rates of herbicides.