دور حامض السالساليك و مركب البايون في حث المقاومة الجهازية المكتسبة في نبات الطماطة Lycopersicon esculentum Mill ضد الفطر Alternaria solani المسبب لمرض اللفحة المبكرة

Abstract EN

The current research aims at studying the effectiveness of salsanic acid and bayon compound individually and by mixing with them in stimulating the system resistance of tomato.

The direct effect of four concentrations of the above mentioned materials on the fungus growth of Alternaria solani in the laboratory conditions.

Results showed that the concentration 150 mg/liter of salsanic acid and bayon compound gave the highest inhibition percentage for the fungus colony which was 52.66 and 55.60% respectively.

The experiments of the acquired system resistance were conducted on tomato super species in the plastic house in which two ways of irrigation were used; watering and sprinkling three days before and after the infection with the Alternaria solani fungus.

All the treatment achieved an increase in the effectiveness of peroxidase enzyme and the highest increase in the effectiveness of the enzyme was with the treatment of the salsalic acid using the sprinkling method and treating it three days before the treatment with Alternaria solani fungus.

The increase in the enzyme effectiveness was 0.0880 (minute/gr of the wet weight).

From the other hand the effective of the enzyme in the contaminated treatment of the fungus was 0.081(minute/gr of the wet weight).