Leaf stripping: an alternative strategy to manage banded leaf and sheath blight of maize
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RESEARCH ARTICLE
Leaf stripping: an alternative strategy to manage banded leaf and sheath blight of maize Harleen Kaur1 · Sanjay Kumar2 · K. S. Hooda3 · Robin Gogoi4 · Pravin Bagaria3 · R. P. Singh5 · Rakesh Mehra6 · Ashwani Kumar6 Received: 14 March 2019 / Revised: 7 August 2019 / Accepted: 13 February 2020 © Indian Phytopathological Society 2020
Abstract Banded leaf and sheath blight disease caused by Rhizoctonia solani f. sp. sasakii is a major constraint of Kharif maize. Wide host range of pathogen, its ability to survive as sclerotia under adverse environmental conditions and lack of resistant sources are some of the bottlenecks in its management. To reduce our dependence on chemicals, experiment was conducted at five hot-spots in India viz., Ludhiana (PAU and Ladhowal), Delhi, Karnal and Pantnagar centres to study the effect of leaf stripping method on disease severity and yield parameters of present day maize hybrids of different maturity groups as well as speciality corn cultivars. Per cent disease control achieved with leaf stripping treatment in different cultivars varied from 16.66 to 54.76% being highest at PAU, Ludhiana centre and lowest at Pantnagar centre. Maximum percent increase in yield was observed at Delhi centre (28.37%) closely followed by PAU, Ludhiana centre (28.23%). Positive correlation (r) was observed between mean per cent disease control and mean percent increase in yield. Keywords Banded leaf and sheath blight · Hot-spots · Leaf stripping · Maize · Rhizoctonia solani f.sp. sasakii
Introduction Maize (Zea mays L.) is the third most essential cereal crop in the world widely utilized as sustenance and domesticated animal fodder, as well as material in industries for items mainly starch and biofuels. Maize ranks fourth in production and fifth in area among the major cereals in India. Considering the losses caused by diseases, 16 out of 62 diseases have * Harleen Kaur [email protected] 1
Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab 141004, India
2
Department of Plant Pathology, Punjab Agricultural University, Ludhiana, Punjab 141004, India
3
ICAR-Indian Institute of Maize Research, PAU Campus, Ludhiana 141 004, India
4
Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi 110012, India
5
Department of Plant Pathology, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand 263001, India
6
CCS Haryana Agricultural University, Regional Research Station, Uchani, Karnal, Haryana 132001, India
been identified as the major constraints. Among the foliar diseases, leaf blights and downy mildew are of economic importance. Among blights, banded leaf and sheath blight (BLSB) incited by Rhizoctonia solani f.sp. sasakii Exner (Thanatephorus sasakii (Shirai) Tu and Kimbrough) (Tu and Kimbrough 1978) is an important disease causing huge economic losses in maize growing areas of the world. Rhizoctonia solani being most widespread, versatile and destructive pathogen is r
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