Research article

EFFICIENCY OF RESIDUES OF AGARICUS BISPORUS MEDIUM FORTIFIED WITH MICROELEMENTS IN CONTROLLING RHIZCTONIA ROT DISEASE ON COWPEA PLANT CAUSED BY RHIZCTONIA SOLANI

Muqdad Salih Al-Darraji* and Abdullah Abdulkarim Hassan

Online First: December 21, 2022


The experiment was conducted in the fields of the Faculty of Agriculture, Tikrit University, during the summer season of 2021.The fungus culture residues were tested with five salts of some microelements, namely iron sulfate FeSO4, manganese sulfate MnSO4, sodium molybdate Mo3Na, and zinc sulfate ZnSO4.Boric acid H3BO3, and the sixth treatment, a combination of these elements, inhibited the disease of rhizoctonia mold on the cowpea plant Vigna unguiculata, which is caused by the fungus Rhizoctoia solani. The treatment of molybdenum and zinc and the mixture of elements excelled with the highest germination percentage, which was 100%, while it reached the lowest percentage when compared to 45%. The highest rate of infection with the pathogenic fungus in the control treatment was 42%, while the highest infection severity in the control treatment was 55%. As for the percentage of chlorophyll, it reached the highest percentage when treated with the mixture of elements with the mixture of residues, as it reached 59 spad, compared to the control, which amounted to 39 spad. In terms of yield weight, the treatment with molybdenum was excelled with the mixture of residues, amounting to 1253.17 gm, while the control treatment amounted to 895.38 gm. The treatment of molybdenum, zinc and succulents mixture excelled in the weight of cowpea seed, reaching 30.59, 30.66 and 30.32 gm, respectively. The treatment with the mixture of elements gave a higher number of grains in one pod, and it was 10.6 grains. As for the qualitative traits, The treatment of the mixture of elements gave the highest percentage of phosphorous elements, which reached 0.55%, and in the percentage of protein, it reached the highest percentage when treated with the mixture of elements and the molybdenum element, which amounted to 24.53 and 24.05%, respectively.

Keywords

cowpea, mineral elements, molybdenum, zinc, fungus culture residues, rhizoctony mold.