Effect of feeding by Metadelphax propinqua (Fieber)(Homoptera, Delphacidae) on barley

Authors

• Mikko Raatikainen University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FIN-40351 Jyväskylä, Finland and Agricultural Research Centre of Finland, Institute of Plant Protection, FIN-31600 Jokioinen, Finland
• Terttu Raatikainen University of Jyväskylä, Department of Biological and Environmental Science, P, O. Box 35, FIN-40351 Jyväskylä, Finland and Agricultural Research Centre of Finland, Institute of Plant Protection, FIN-31600 Jokioinen, Finland.
• Arja Vasarainen University of Jyväskylä, Department of Biological and Environmental Science, P, O. Box 35, FIN-40351 Jyväskylä, Finland and Agricultural Research Centre of Finland, Institute of Plant Protection, FIN-31600 Jokioinen, Finland.

DOI: https://doi.org/10.23986/afsci.72713

Abstract

The effect of feeding by the Turkish Metadelphax propinqua on barley was investigated in Finland. The number of M. propinqua nymphs and the length of their feeding period on barley did not have any major effects on the barley plants. M. propinqua males had a greater effect on the properties of barley than did the nymphs. The effect of M. propinqua females on the barley was much greater than that of either the nymphs or males. Their number and the length of feeding time lowered the length and weight of plants, the number of grains, the grain yield and the 1000-grain weight