تأثير ايضيات الفطرين Rhizoctonia solani و Trichoderma harzianum الناميين في مياه البزل على بعض مؤشرات نمو الحنطة و وزن الكتلة الحيوية الجافة للفطرين

Abstract EN

Rhizoctonia solani and Trichoderma harzianum were isolated from cultivated soils and drainage soils of Al-Haffar, Al-Eqbariah, Al-Dassim and Al-Chabab belong to different towns of the Najaf province that include Abbasiya, Hurriayh, Hirra and Mashkhab to determine the effect of diferent levels of electrical conductivity 4,8 and 12 d.Sm-1 in performance of five isolates of Rhizoctonia solani (R.s1, R.s2, R.s3, R.s4, R.s5) and four isolates of Trichoderma harzianum (T.h 6, T.h 7 , T.h 8, T.h 9) such as their dry biomass , pathogenicity and some growth indicators, The results indicated that the dry biomass of both fungial species had an inversely proportional with the increase of electrical conductivity.

The effect of both fungal species on the percentage of seed decay percentage of wheat was also determine intp petri dishes the exudate of R.s 3 at 12 d.sm-1 resulted in highest level of seed decay which was 85 % compared with 10 % in the control treatment after 28 days in addition R.

s had gave a highest level of healthy seedlings at 4 d.Sm -1 after 21 days which was 95 % compared with 35 % in the control treatment .

however , control treatment (with out adding fungi) resulted in increasing the length of hypocotyl at both 8 and 4 d.Sm -1 after 21 days which was 6.8 cm for both of them.