Control of Helminthosporium leaf blight of spring wheat using seed treatments and single foliar spray in Indo-Gangetic Plains of Nepal
Citation
Dipak Sharma-Poudyal, Ram Sharma, Etienne Duveiller. (18/6/2016). Control of Helminthosporium leaf blight of spring wheat using seed treatments and single foliar spray in Indo-Gangetic Plains of Nepal. Crop Protection, 88, pp. 161-166.
Abstract
Four fungicides for seed treatments and one as foliar spray were tested in replicated field experiments in
a strip plot design to determine the effect of fungicides on Helminthosporium leaf blight (caused by
Cochliobolus sativus and Pyrenophora tritici-repentis) severity and grain yield of wheat. Wheat seed cv. RR
21 was treated with fungicides, carbendazim (Areestin), triadimenol (Baytan), tebuconazole (Raxil), and
carboxin þ thiram (Vitavax 200B). Single foliar application of propiconazole (Tilt) was sprayed at
flowering stage. Controls were included for both factors and treatments were replicated four times.
Triadimenol and carboxin þ thiram increased seed germination in both years. Triadimenol, tebuconazole,
and carboxin þ thiram reduced the number of infected seedlings and seedling root rot severity in both
years. Number of tillers was higher in carboxin þ thiram treated plots compared to other seed treatments.
Compared to the control, carboxin þ thiram increased grain yield by 9% and 8% in 2004 and 2005,
respectively, and triadimenol by 6% in both years. The foliar spray of propiconazole significantly reduced
Helminthosporium leaf blight severity and increased thousand-kernel weights. Propiconazole spray
increased grain yield by 15% and 14% in 2004 and 2005, respectively. Therefore, seed treatment either
with triadimenol or carboxin þ thiram in combination with single post-flowering foliar spray of fungicides
should minimize grain yield loss due to wheat foliar blight in South Asia. The findings of this study
could be useful in developing strategies to manage Helminthosporium leaf blight in South Asia and other
warm wheat growing regions of the world.
DSpace URI
https://hdl.handle.net/20.500.11766/6387Other URI
https://mel.cgiar.org/dspace/limitedCollections
Author(s) ORCID(s)
Sharma, Ramhttps://orcid.org/0000-0002-7785-363X
Subject(s)
AGROVOC Keywords
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