Create your own conference schedule! Click here for full instructions

Abstract Detail

Host/Plant Pathogen Interactions and Plant Health Management

MacLean, Dustin [1], May, William [2], Peng, Gary [3], Coles, Ken [4], Turkington, T. Kelly [5], Harding, Michael [6], Kutcher, H. Randy [1].

Fungicide application at anthesis provides effective leaf spot control in spring wheat.

Leaf spotting diseases commonly occur in spring wheat causing yield losses of up to 15%, depending on cultivar and environmental conditions. Recently, fusarium head blight (FHB) has become a major concern as yield losses may be >50%, and the pathogen produces mycotoxins. Optimal fungicide timing to control leaf spots is at the flag leaf stage and for FHB at anthesis. The objective of the current study was to determine whether applying fungicide at anthesis would provide adequate control of leaf spots compared to application at flag leaf. Five fungicide treatments were applied to cv. Carberry at two timings: flag leaf or anthesis, and both. The experiment was conducted at 10 locations over 2 years. Results were analysed by: 1) brown soil zone with low disease severity, 2) black soil zone with low disease severity, and 3) black soil zone with high disease severity. There was no difference in yield when applying fungicide at flag leaf or anthesis in either black or brown soil zones with low disease severity. In the black soil zone with high disease severity, there was a greater reduction in leaf spot severity when fungicide was applied at flag leaf stage or at both timings than at the anthesis stage. However, yield was higher when fungicide was applied at anthesis compared with flag leaf stage, and greater with applications at both timings than a single application at either timing. These results suggest the optimum timing of fungicide application for maximum yield is at anthesis of wheat.

Log in to add this item to your schedule

1 - University of Saskatchewan, Plant Sciences, 51 Campus Drive, Saskatoon, SK, S7N1L5, Canada
2 - Agriculture and Agri-Food Canada, PO Box 760, Indian Head, SK, SOG 2K0, Canada
3 - Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, S7N 0X2, Canada
4 - Farming Smarter, #100 5401-1st Ave. S., Lethbridge, AB, T1J 4V6, Canada
5 - Agriculture and Agri-Food Canada, 6000 C and E Trail, Lacombe, AB, T4L 1W1, Canada
6 - Agriculture and Rural Development, Crop Diversification ctre., S. 301 Horticultural Stn. Rd. E., Brooks, AB, T1R 1E6, Canada

Disease management.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PPA014
Abstract ID:1218
Candidate for Awards:CPS Best Student Presentation Awards,CSA Graduate Student Competition for Best Poster Presentation

Copyright 2000-2015, Botanical Society of America. All rights reserved