Management of root-rot disease complex of mungbean caused by Macrophomina phaseolina and Rhizoctonia solani through soil application of Trichoderma spp

• Published in: Crop protection Vol. 119; pp. 24 - 29
• Main Authors: Khan, Mujeebur Rahman, Haque, Ziaul, Rasool, Farahnaz, Salati, Khalid, Khan, Uzma, Mohiddin, Fayaz A., Zuhaib, Mohammad
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2019
• Subjects: Nodulation; Root-rot index; T. harzianum; T. viride; Trichoderma hamatum; Nodulation; Root-rot index; T. viride; T. harzianum; Trichoderma hamatum
• ISSN: 0261-2194; 1873-6904
• DOI: 10.1016/j.cropro.2019.01.014

This is the first study that reports management of root-rot complex caused by Macrophomina phaseolina and Rhizoctonia solani concomitantly (104−6 CFU g−1 soil) in mungbean by Trichoderma spp. under field condition. Effectiveness of Trichoderma harzianum, T. hamatum, T. viride, T. polysporum and T. koningii against root-rot causing pathogens, M. phaseolina and R. solani was evaluated in vitro (dual inoculation test). The field performance of above Trichoderma spp. against root-rot disease complex caused by M. phaseolina and R. solani in mungbean was evaluated during two consecutive years. The farmyard manure colonized by T. harzianum, T. hamatum and T. viride was applied in the soil at 250 kg/ha (50 g/microplot) under field condition. The Trichoderma strains were characterized for fungicide sensitivity to distinguish from indigenous isolates, if they are present in the field soil. Mungbean cv. T44 expressed higher susceptibility to concomitant inoculations of M. phaseolina and R. solani, and exhibited significant suppression in plant growth (12–17%) and grain yield (26–30%) in two years. Treatments with Trichoderma species controlled root-rot, and improved mungbean yield, highest with T. viride, followed by T. harzianum and T. hamatum. Soil populations of M. phaseolina and R. solani decreased significantly in the plots receiving T. viride, T. harzianum or T. hamatum, whereas Trichoderma populations increased correspondingly. Soil application of T. viride or T. harzianum effectively controlled the root-rot disease complex (5–15%) and improved the grain yield of mungbean (14–19%) in diseased plots. Overall performance of T. viride was relatively better than carbendazim. •Rhizoctonia solani and Macrophomina phaseolina caused root-rot disease complex.•The pathogens significantly suppressed the seed germination and yield of mungbean.•Soil application of Trichoderma spp. controlled disease better than carbendazim.•T. viride checked the disease (46–61%) and improved the yield (9–17%) of mungbean.•Soil population of T. viride increased (57–60%), but of pathogens declined (57–60%).