التعرف على سلوك المبيدات الفطرية التابعة لمجموعة البنزيميدازول في غراس الزيتون بعد معاملة التربة

الملخص EN

The behavior and the systemic activity of three systemic fungicides (Carbendazim, Benomyl and Thiophanate methyl) belonging to the Benzimidazoles group were in¬vestigated after soil treatment on two-years-old olive seedl- ings.

Results indicated that soil treatment led to Carbenda¬zim presence in soil and roots for relatively short time after treatment, not exceeding 8 weeks.

Whereas, Benomyl and Thiophanate methyl persisted in the soil for more than 16 weeks, in concentrations sufficient to inhibit the fungus growth.

The three fungicides penetrated and accumulated in various parts of the roots.

The translocation to the leaves was weak and reached areas about 40-60 cm above the soil level, despite the high dosage of fungicides used (5.0 gr ac¬tive ingredient/seedling).

This indicated that soil treatment is not the method of choice to control this fungus in the higher parts of the trees.

The concentrations of fungicides in soil, roots, stems and leaves were determined using a bio-assay method which proved to be accurate and easy.