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ARS Home » Southeast Area » Byron, Georgia » Fruit and Tree Nut Research » Research » Publications at this Location » Publication #321292
Title: Do single, double or triple fungicide sprays differentially affect the grain quality in winter wheat?

Author
item EL JARROUDI, MOUSSA - University Of Liege
item KOUADIO, AMANI - University Of Southern Queensland
item JUNK, JURGEN - Luxembourg Institute Of Science & Technology
item BEYER, MARCO - Luxembourg Institute Of Science & Technology
item Bock, Clive
item DELFOSSE, PHILIPPE - Centre De Recherche Public - Gabriel Lippmann

Submitted to: Field Crops Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/18/2015
Publication Date: 8/27/2015
Citation: El Jarroudi, M., Kouadio, A., Junk, J., Beyer, M., Bock, C.H., Delfosse, P. 2015. Do single, double or triple fungicide sprays differentially affect the grain quality in winter wheat?. Field Crops Research. 183:257-266.

Interpretive Summary: Fungicides are typically used on wheat to minimize economic damage due to diseases. The effects of three fungicide spray regimes was evaluated: a single (1T), double (2T) and triple (3T) spray was tested on four different grain quality parameters [thousand kernel weight (TKW), test weight (TW), grain protein content (GPC), and Zeleny sedimentation volume (ZSV)] during the 2006-2009 period at two sites in Luxembourg. The fungicides used were a mix of strobilurins and triazoles. The results in >75% of cases indicate that fungicides did not significantly affect TW or ZSV at either sites. There was a significant effect of fungicide regime on GPC in 3 of the tests. However, the fungicide treatments significantly affected TGW at both sites in all years, except 2008. Interestingly, when there was an effect of fungicides on a grain quality parameter, there was no difference among different fungicide treatments. Thus under conditions in Luxembourg, a single fungicide treatment resulted was as effective as a double or triple treatment for maintaining grain quality.

Technical Abstract: Foliar fungicides in wheat are typically used to safeguard against economic damage from diseases. In this study, we assessed the effects of three fungicide spray regimes [single (1T), double (2T) and triple (3T)] on four different grain quality parameters [thousand kernel weight (TKW), test weight (TW), grain protein content (GPC), and Zeleny sedimentation volume (ZSV)] during the 2006-2009 period at two sites in Luxembourg. The fungicides used were a mix of strobilurins and triazoles. At Burmerange, (cultivar Cubus), the values of TGW, TW, GPC and ZSV ranged from 38 to 62 g, 67 to 83 kg hl-1, 12.0% to 14.7% dry matter (DM), and 27 to 54 ml, respectively. Whereas, at Everlange (cultivar Achat), the ranges of TGW, TW, GPC and ZSV were 42 to 65 g, 65 to 81 kg hl-1, 11.0% to 15.0% DM, and 21 to 66 ml, respectively. Results in >75% of cases indicate that fungicides did not significantly affect TW or ZSV at either sites (P > 0.05). There was a significant effect of fungicide regime on GPC at Burmerange in 2 of the 4 yrs), but at Everlange only in 2006 (P < 0.05). However, the fungicide treatments significantly affected TGW at both sites in all years, except 2008. Interestingly, when there was an effect of fungicides on a quality parameter, there was no difference among different fungicide treatments. Thus under conditions in Luxembourg, a single fungicide treatment resulted in statistically similar grain quality parameters when compared with a double or triple treatment.