فعالية بيروكسيد الهيدروجين في تحفيز المقاومة لمرض ذبول فيوزارم على الطماطم البندورة المتسبب عن الفطر Fusarium oxysporum

الملخص EN

This study was carried out in the Plant Pathology Laboratory, Department of Agricultural Research, Ministry of Science and Technology, Iraq during 2016- 2017 to evaluate the efficiency of using hydrogen peroxide to enhance resistance in tomato to fusarium wilt disease caused by Fusarium oxysporum under laboratory, green house and field conditions.

Results of the effect of hydrogen peroxide treatment on growth of the peroxide concentrations (50, 100, 200 ppm) significantly inhibited the rate of linear growth of pathogen dry weight, biomass and number of spores.

The highest H2O2 concentration treatment (200 ppm) was significantly superior to the other treatments in reducing the linear growth rate, dry weight of biomass and number of spores which reached 26.0 mm, 0.0 mg, 0.46 x 106 spores/cm2 as compared to the control treatment which reached 46.67 mm, 0.33 mg and 9.17 x 106 spores/cm2, respectively.

The results showed that the 200 ppm hydrogen peroxide treatment gave highest inhibition rate of growth and biomass dry weight that reached 43.06% and 100 %, respectively.

Results of the effect of three concentrations of hydrogen peroxide (50 , 100 and 200 ppm) on some tomato plant growth parameters under green house and field conditions indicated that all the treatments significantly improved most of the tested growth parameters as compared to the control and significantly reduced wilting rate of infected plants.