Exploring Host Plant Resistance of Cowpea as for Macrophomina Phaseolina (Tassi.) Goid) Causing Dry Root Rot Pathogen under Artificial Inoculation Condition

Abstract

Background: Cowpea (Macrophomina phaseolina (Tassi.) Goid) is accepted as a very critical commercial crop belong to arid and semi-arid region. Among various diseases of cowpea dry root rot caused by M.P. is a major constrain to drop down the significant yield loss as factor that it was serve as both seed and soil borne with wide host range. Dry root rot disease in cowpea causes the lowering of average yield as compared to its potential yield. The current study greatly emphasized to find out suitable resistance genotype against cowpea and adverse remark of dry root rot on yield

Methods: Screening was conducted against nineteen cowpea genotypes to find out the resistance reaction against dry root rot under artificial inoculated condition between for three consecutive three year that is 2019, 2020, and 2021.

Conclusion: Cowpea genotypes were explored to find out the resistant source against dry root rot of cowpea, none of the entry was found free from dry root rot. The data on severity index reveals that the highest disease severity index was recorded with accession GC-1712 (91.69 %), followed by KBC-11 (88.91 %), TC-1901 (80.53%), CPD-311 (75.00 %), KBC-13 (72.22 %), DC-15 (63.90 %), PCP 1124-1 (20.54 %), PCP-0306 (19.99 %), KBC-9 (6.67%), RC-101 (5.56 %), CPD-313 and GC-1602 (5.00 %), GC-3 (4.44 %), Pant lobia-3, PGCP-69  and TPTC-29 (3.89 %), PGCP-70 (2.22 %), while disease severity index minimum was recorded in accession Pant lobia-4 and MC-17-2 (KBC-12) (1.11 %) respectively. Eleven entries viz.,  GC-3, TPTC-29, RC 10, KBC-9, Pant Lobia-3, Pant Lobia-4, MC 17-2 (KBC-12), CPD-313, PGCP-69, GC-1602, PGCP-70 were found moderate resistant, two entries PCP-0306 and PCP 1124-1 were moderate susceptible and six entries  DC-15, CPD-311, KBC-13, KBC-11, TC-1901 and GC-1712 were highly susceptible.