تأثير بعض عوامل المكافحة الإحيائية في خنفساء الحبوب المنشارية (ذات الصدر المنشاري)‎ Oryzaephilus surinemensis (Silvanidac : Coleopetra)‎

Abstract EN

This study was conducted in the College of Agriculture ,University of Basrah, to evaluate the effectiveness of Using four bio control agents, the fungiis Trichoderma harzianum Rifai and fungus Beauveria bassiana, and the bacteria Bacillus cereus ; and bacillus thuringsis :on the insect saw toothed grain beetle Oryzaephilus surinamensisThe result showed that treatment with T.

harzianum gave highest effect on insect with 90%death rate after 5,7 days of treatment with concentration of 1,2,3 gm/dish the effectiveness rate of T.harziamum revealed 67.2%as compared with 45.2% for treatment with the fungus Beaveria bassiana .the treatment with T.harzianum in concentration of 3gm showed significant difference with the concentration l,2gm indicating death rate of 66.6% ,36.2 and 47.0 % Respectively.

The results revealed the death rate was increased with increasing the time of exposure ,reaching to 28.1,60.1 and 61.5 % after 3,5,7 days of treatment respectively.

The weight of the seed was 7.91 gm and 6.27 gm after treatment with fungi T.harzianum and B.

bassiana respectively .

Also the general mean of effect of the fungus T.harzianum after one month of treatment was 7.25 gm as compared with the fungus B.

bassiana with 6.13 gm ,the weight of the seeds was as 7.1 gm in concentration of 3 gm as compared with 6.00 ,6.3 gm in the concentration 1,2 respectively .

The results showed that the effect of the bacteria B.

cereus on the weight of seed was 6.09 for the concentration of 4.98 gm as compared with 4.57 and 4.43 gm for the concentration of 1,2 gm respectively .The loss in seed weight was reduced to 0.56 in treatment with T.harzianum and 0.56 in treatment with B.

cereus.