Pest Management Science
Pest Management Science
5 years ago

Foliar application of benzovindiflupyr shows non-fungicidal effects in wheat plants

Mafalda Nina, Philippe Camblin, Alexandre Brice Cazenave, Dmitry Kuznetsov, Jörg Leipner, Odile Rambach
BACKGROUND The fungicide benzovindiflupyr belongs to the class of succinate dehydrogenase inhibitors (SDHIs). Certain SDHIs have shown plant physiological effects, so called secondary effects, that appeared to be related with the plant water status. Therefore, the effect of benzovindiflupyr on transpiration in leaves and whole wheat plants grown was studied under controlled conditions. Furthermore, wheat yield trials under controlled and natural drought stress in the field were conducted. RESULTS Transpiration of detached wheat leaves was reduced by benzovindiflupyr in a dose-dependent manner. Similarly, whole plant transpiration decreased for several days when plants following application with this fungicide. In 16 field trials under drought stress conditions that were classified as diseases free, treatment of wheat plants at flag leaf stage or at heading with benzovindiflupyr showed a grain yield increase (+5.2%; p < 0.01) that was partially attributed to an increased thousand grain weight. CONCLUSIONS Water saving during pre-anthesis by benzovindiflupyr may be associated with better seed setting and filling under dry field conditions in wheat. The results of this research provide new insights into secondary effects of SDHIs that directly lead to yield improvements.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ps.4754

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