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In Vivo Study of Different Compounds and Sowing Time for the Management of Turcicum Leaf Blight of Maize caused by Exserohilum turcicum (Pass.) Leonard and Suggs

Author: Shakeelahamed J.T., Venkatesh, Mallikarjuna N. and Muniswamappa M.V.

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Abstract

To identify improved control strategies for maize turcicum leaf blight (TLB) disease, including the use of different fungicides, bioagents and botanicals to decrease yield loss in the crop. Maize ( Zea mays L.) is one of the most important food crops worldwide, along with rice and wheat, serving as a staple food, livestock feed, and industrial raw material. TLB of maize is caused by Exserohilum turcicum (Pass.) Leonard and Suggs, and it is one of the primary constraints in all major maize growing areas of Southern Karnataka, causing higher grain production losses in maize crops. Seed treatment and foliar spray were used to test the efficacy of eleven treatments, including bioagents, botanicals, and fungicides, in reducing TLB in susceptible maize variety CM 202. In Kharif and Rabi 2016, foliar sprays with Trifloxystrobin 25% + Tebuconazole 50% @ 0.7 g/l were found to be effective in reducing disease severity by 66.93 and 67.06 per cent, respectively, while foliar sprays with M

Keywords

Maize, turcicum leaf blight (TLB), Exserohilum turcicum, Fungicides, Bioagents, Management.

Conclusion

Foliar sprays with Trifloxystrobin 25% + Tebuconazole 50% @ 0.7 g/l effectively reduced disease severity, increased grain yield, and had a high benefit to cost ratio, followed by foliar sprays with Mancozeb @ 2.5 g/l and foliar spray with Tebuconazole @ 1ml g/l. Seed treatment combined with foliar sprays of Trichoderma harzianum @ 5g/l and Azadirachta indica @ 10 per cent reduced disease severity among bioagents and botanicals. In the susceptible inbred line CM- 202, disease severity was found to be low during early and mid-sowing.

References

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How to cite this article

Shakeelahamed J.T., Venkatesh, Mallikarjuna, N. and Muniswamappa, M.V. (2021). In Vivo Study of Different Compounds and Sowing Time for the Management of Turcicum Leaf Blight of Maize caused by Exserohilum turcicum (Pass.) Leonard and Suggs. Biological