دراسة مقارنة لتقدير مدى تأثير المبيد الحشري ديازينون و نوكوز على بعض فطريات التربة مختبريا

الملخص EN

Four fungi ,have been isolated from the rhizosphere of Viccia faba in the AL-Qadisiya District fields , were selected for their variable resistance to toxic insecticide Diazinon at the range of ( 0.2 , 0.4 and 0.6 )ppm concentration where the ( 0.6 ) ppm concentration represents to the initial concentration in the field soil .

Another Nogos insecticide have been Studied at the range of ( 0.1, 0.3 and 0.5 ) ppm concentration where the (0.5) ppm concentration represents the initial concentration in the field soil .

These fungi were Aspergillus niger , Rhizopus stolinifer ( high tolerance ) , Trichoderma harzianum ( moderate tolerance ) , Fusarium solani ( Low tolerance ) .

The inhibition percent age of T.

harzianum reaches to ( 18.8%) , ( 16.6%) with Diazinon on solid media in ( 0.2 and 0.4 ) ppm concentration , but the inhibition percent age of Fusarium solani reaches to ( 22.2 %) , ( 11.1%) In ( 0.4 and 0.6 ) ppm concentration .

The inhibition percent of T.harzianum reaches to ( 28.8%) with insecticide Vapona ( Nogos ) on solid media in ( 0.5 ) ppm concentration , but the the inhibition percent age of F.solani reaches to ( 45.5% ) in ( 0.5 ) ppm concentration and ( 36.6% ), ( 46.6 %) in ( 0.1 and 0.3 ) ppm concentration .

The results have shown that A.niger , R.

stolinifer and T.

harzianum are able to convert these insecticide to other compounds in laboratory , but F.

solani dose not convert these insecticides .