Dynamics of serious pest of Metopolophium dirhodum (Walk.) (Hemiptera: Aphididae) on shrubs of Rosa rugosa Thunb.
Introduction: Rose grain aphid (Metopolophium dirhodum Walk.) is one of the most important pests on cereals in Poland. The economic importance of this pest has increased in recent years due to the increase in the area of maize cultivation. M. dirhodum is an oligophagic aphid feeding also on different rose species. Objective: The purpose of the present study was to evaluate the dynamics of population of M. dirhodum on the saltspray rose. Methods: The studies were conducted on saltspray rose stands at Aleksandria Park in Siedlce in 2005–2009. At each selected stand, 50 rose shoots were observed every 7 days from March to spring migration of the aphid. Results: First fundatrices of the M. dirhodum on the R. rugosa were observed at the end of March. The rosegrain aphid population development on the primary host during May, and reached maximum population in the middle of May. During autumn, the aphid backed for overwintering on the primary host. Conclusion: While the M. dirhodum population outbreaks, the aphid might be a serious pest of the saltspray rose.