Dynamics of serious pest ofMetopolophium dirhodum(Walk.) (Hemiptera: Aphididae) on shrubs ofRosa rugosaThunb.

Abstract

SummaryIntroduction:Rose grain aphid (Metopolophium dirhodumWalk.) 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. dirhodumis an oligophagic aphid feeding also on different rose species.Objective:The purpose of the present study was to evaluate the dynamics of population ofM. dirhodumon 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 theM. dirhodumon theR. rugosawere observed at the end of March. The rose-grain 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 theM. dirhodumpopulation outbreaks, the aphid might be a serious pest of the saltspray rose.

The Peculiarities of Metopolophium dirhodum (Walk.) Population Formation Depending on Its Clonal and Morphotypic Organization during the Summer Period

“…In late summer, winged males and gynoparae appear in aphid colonies and migrate back to their primary hosts. The gynoparae give birth to sexual females, which mate with males and produce overwintering eggs [ 49 , 50 , 51 ].…”