Vol. 12, Issue 5 (2023)

Author(s):
Meghana SP, SI Harlapur, Pavitra and Ranjana

Abstract:
Turcicum Leaf Blight (TLB) is a major foliar disease of maize caused by the fungus Exserohilum turcicum. The disease is most prevalent in all the major maize growing regions of India during rainy (kharif) as well as in winter (rabi) season since last two decades. However, management of the TLB through the continuous use of chemicals may alarm new problems in crop production. Hence, the host plant resistance is a cheap and environmentally reliable component to minimize the disease intensity below the threshold level. Keeping in view the above points, screening of 55 hybrids along with two standard checks i.e., CI 4 (Resistant check) and CM 202 (Susceptible check) were evaluated against E. turcicum under artificially inoculated field conditions. Using 1-9 rating scale disease reaction and AUDPC values of hybrids were also calculated. Among the 55 hybrids, five hybrids viz., DKC 7074, DKC 7173, DKC 8174, DKC 9145, DKC 9157 and CI 4 (RC) recorded resistant reaction.