Evaluation the efficiency of different concentrations of Chitosan, regular and Nano urea fertilizer in inhibiting the growth of the fungi Penicillium digitatum and P. italicum that cause Green and Blue mold on oranges

Abstract

The results showed isolating the pathogen from the infected orange fruits, which were collected randomly from the local markets of Babylon Governorate / Al-Musayyab district. Four isolates of Pencillium digitatum and three isolates of Pencillium italicum were obtained. One isolate of Aspergillus fumigatus was discovered. The study showed the superiority of Nano urea fertilizer over regular urea fertilizer, but with a small percentage in inhibiting both P. digitatum and P. italicum. The percentage of inhibition achieved 88.88, 100 and 100% for each of the concentrations 5, 10 and 15%, respectively, for P. digitatum, and the percentage of inhibition of 89.25, 100 and 100% for each of the concentrations 5, 10 and 15% for P. italicum, respectively, compared to With regular urea fertilizer. The results showed that there were significant differences between the regular and Nano chitosan treatments and the comparison treatment with its effect on the growth rate of P. digitatum and P. italicum for both normal and Nano chitosan, each of which achieved a high rate of inhibition of the two pathogenic fungi.