Wiik, Lars
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences
Research article2013Peer reviewed
The role of seed infection level and fungicide seed treatments in control of net blotch in barley
Wiik, Lars; Hysing, Shu-Chin
Abstract
The effect of seed-borne net blotch infection in barley on the agronomic characters yield, thousand kernel weight, grain volume weight, protein, starch and plant density was investigated in field trials using six net blotch infection levels (100/0, 80/20, 60/40, 40/60, 20/80 and 0/100 % high/low infected seed) and four fungicide seed treatments. The untreated trials showed significant differences between infection levels only for some agronomic characters, years and levels. Seed treatment with Anchor (carboxin + thiram) reduced net blotch by nearly 100 %, compared to 81 % by Fungazil A 25 (imazalil), 60 % by Rancona i-MIX (ipconazole + imazalil) and 54 % by Rubin TT (triticonazole + prochloraz + pyrimethanil). Anchor significantly increased yield 3-7 %, thousand kernel weight 3-13 %, grain volume weight 3-9 % and protein content 1-7 % in the first year, but not in the second. Fungazil A 25 had a low positive effect on agronomic characters, while Rancona i-MIX and Rubin TT had a positive, negative or no effect. The correlation between percent infected kernels in the conventional osmotic method and real-time PCR results was high, showing a potential for complementing traditional plate test methods with molecular methods that needs further optimization. The development of net blotch and its effect on agronomic characters thus depended on many other factors than the seed infection level. The current recommendations for seed treatment could be considered a preventative measure.
Keywords
Drechslera teres; Pyrenophora teres; Osmotic method; Real-time PCR; Seed health
Published in
European Journal of Plant Pathology
2013, volume: 137, number: 1, pages: 169-180
Publisher: SPRINGER
SLU Authors
Hysing, Shu-Chin
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences
Associated SLU-program
AMR: Fungus
UKÄ Subject classification
Horticulture
Publication identifier
- DOI: https://doi.org/10.1007/s10658-013-0230-7
Permanent link to this page (URI)
https://res.slu.se/id/publ/54644