RESPONSE OF Rhopalosiphum padi L. (HEMIPTERA: APHIDIDAE) TO THE CONTENT OF FLAVONOIDS IN WINTER WHEAT TREATED WITH A BIOSTIMULANT AND BENEFICIAL MICROORGANISMS

  • Robert Lamparski Department of Biology and Plant Protection, UTP University of Science and Technology in Bydgoszcz prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
  • Maciej Balcerek Chair of Pharmacognosy, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz M. SkĹ‚odowskiej-Curie 9, 85-094 Bydgoszcz, Poland
  • Karol Kotwica Department of Agronomy, UTP University of Science and Technology in Bydgoszcz prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
  • Daniel Modnicki Chair of Pharmacognosy, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz M. SkĹ‚odowskiej-Curie 9, 85-094 Bydgoszcz, Poland

Abstract

Background. The bird cherry-oat aphid (Rhopalosiphum padi L.) is one of the most important pests of cereal plants. Limiting its number by using pro-ecological methods such as biostimulants does not result in environmental contamination.  
Material and methods. Winter wheat plants were grown under laboratory conditions and treated with the following preparations: EM Naturalnie Aktywny, which is based on beneficial microorganisms, and/or the Asahi SL biostimulant. In the BBCH 32 phase some plants were harvested and the percentage flavonoid content, calculated as quercetin, was determined, while the remaining plants were used to assess the level of feeding and development of the bird cherry-oat aphid.
Results. Wheat plants treated with biostimulants containing beneficial microorganisms contained on average 0.641% dry matter flavonoids. The pre-reproductive period of bird cherry-oat aphids was 8 days. Daily aphid fecundity was slightly more than three larvae per day. The length of the reproductive period of bird cherry-oat aphids on wheat plants ranged from 8 to 9 days. After 5 days of feeding, 2 adult aphids caused on average 15% damage to the plant surface. Correlation coefficients between the flavonoid content in wheat plants and development parameters and the extent of damage caused by bird cherry-oat aphids were insignificant.
Conclusion. The use of a biostimulant and beneficial microorganisms in wheat cultivation was found to be not statistically  significant, but a reduction in the feeding and development of R. padi was observed.

Published
Aug 19, 2019
Section
Original paper