تقييم القدرة التضادية لأربعة و ثلاثين عزلة من الفطر .Trichoderma spp ضد الفطر Macrophomina phaseolina تحت ظروف المختبر و البيت الزجاجي

Abstract EN

The result of antagonistic activity of thirty four isolates of Trichoderma spp.

against a highly virulent isolate of Macrophomina phaseolina using dual culture technique showed that isolates no.

12, 21, 22 15, 28, 29, 27, 8, 9, 5, 6, 10, 11 and 23 were of a high antagonistic activity of 1.1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.8, 1.8, 1.8, 1.8 and 1.8, respectively, based on an antagonistic scale of 1-5.

Under greenhouse conditions, the tested isolates T21 and T22 were found to be highly effective in inducing significant reduction in sesame charcoal rot disease severity of 0.29 and 0.31, respectively, compared to untreated control treatment (1.0), 5 weeks after planting.

Isolates (T.21 and T.22) were identified as T.

pseudokoningii (Rafi), and T.

viride (Rafi) respectively.