The effect of indole acetic acid, soil salinity and Macrophomina phaseolina fungus that causes rot coal and overlap with each other in the germination percentage of two varieties of okra Al_Husenawe and Petra weight soft seedlings

Abstract

This study aimed to determine the effect of different concentrations of acetic acid( Indole Acedic Acid)(IAA) and salinity in the growth and activity of pathogenic fungus Macrophomina phaseolina that causes charcoal rot disease on okra plants, The results showed that soak the seeds of okra in acetic acid led to reduce of the fungus effect and salinity on the seed germination and seedling length and weight of the two varieties Al_Husenawe and AL Petra . The results showed that soaking the seeds using a concentration of 200 μm of the IAA gives positive results on germination percentage, weight and length of the seedling which was more effective after reaching its highest percentage of germination of the cultivars okra Al_husenawe and Petra 93% and 90%, respectively, when the electrical connection 2 Dessie Sameenz.m -1 and the concentration of 200 μm of IAA . Less germination percentage was showedin the two cultivars Al_Husenawe, Petra (40 and 36.6%) respectively, at the same electrical connection treatment 6 Dessie Sameenz. m -1 and 0 μm from the IAA in the presence of fungus as well as the impact of the IAA positively on the length and weight of seedling which reaching 10cm and 668g for Al_Husenawe variety and 9.5cm and 660g for Petra variety stood. The lowest rate was 4 cm length of the seedling for both cultivars and the lowest rate of seedling weight cultivars (Al_Husenawe and Petra) 313 and 316g respectively. Also the results showed that soaking seeds in IAA gives positive results on germination percentage. The concentrations 200 μm of the IAA was more effective where the highest percentage of seed germination of the two varieties Al_husenawe and Petra was 74.22 and 75.15% respectively. The effect of fungus was significant and reached lowest germination percentage for both cultivars Al_husenawe and Petra ( 56.53 and 54.8%) respectively. The percentage at highest concentrations of salt 6 Dessie Sameenz. m-1 gave a high germination of for bothvarieties Al_husenawe and Petra (54.83 and 56.09%) respectively, which was significantly difference from the rest of concentrations. The best germination percentage when the salt concentration 2 Dessie Sameenz. m-1 reached 77.03 and 75.5% respectively.