تحسين كفاءة المبيد الفطري دايثين م-45 باستخدام السكر المتعدد المايكروبي لمقاومة الفطريات المسببة لموت بادرات الباميا (Ablelmoschus Esculentus L)‎

الملخص EN

Laboratory tests of three fungicides, dithane M-45 (mancozeb), captan 50 and rhizolex with four concentrations each 0.0, 50, 100 and 200 mg active inegradient / l of potato dextrose Agar (PDA) medium on the growth of fungi Macrophomina phasealina 2 isolates of Fusarium solani and Rhizoctonia solani, the causal agents of damping off and root rot of okra, Dithane M-45 showed high inhibition (100%) effect for the mycelial growth of pathogenic fungi at 100 mg a.c / l PDA.

treating okra (Ablelmoschus esculentus) seeds (local cultivar) by various concentrations of dithane M-45 (0.0, 1.0, 2.0 and 3.0) gm / kg seeds with the microbial polysaccharide produced by the fungus Alternaria alternata or Arabic gum (5 gm / l distilled water) was superior than the fungicide alone through all the treatments in causing significant decrease in % infection and disease severity of the seeding damping off disease at conc.

3 gm / kg seeds with the polysaccharide which gave 4 %, 5.33 % and 0.07 respectively and 8.7 %, 10.0 % and 0.15 with the Arabic gum respectively.

there were no significant differences noticed between the treatment of the seeds with the polysaccharide with the Arabic gum in reducing% infection and disease severity of the disease.

also, it caused significant increase in the length of shoot and root systems and dry weight of the plants which reached 16.33 cm, 6.04 cm and 0.0204 gm at 3 gm / kg seeds with the polysaccharide and 13.91 cm, 4,99 cm and 0.144 gm for Arabic gum respectively as compared with the treatment by the fungicide dithane M-45 alone (without sticking material) which gave 11.95 cm, 3.95 cm and 0.124 gm respectively.