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2013年50 No.1
The population dynamics of Frankliniella occidentalis in roses grown using different methods
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Key Words：Frankliniella occidentalis, population dynamics, planting mode, Rosa hyrida
Abstract：Western flower thrips (WFT) Frankliniella occidentalis (Pergande) is the most serious pest of Rosa hybrida (L.) in Kunming.
We observed the population dynamics of WFT in roses grown using two different methods in the year 2006-2008. We found that
WFT occurred throughout the year with a population peak between May and July. This peak was observed earlier (20-30 days) in
roses grown in the field than in those grown in the greenhouse. The population peak density in greenhouse roses was 87
thrips/flower, while peak density in field roses was 90 thrips/flower. The difference between these population densities
was found to be significant (P<005) using the ttest. In both cultural varieties of rose studied (′movie star′ and ′
carola′) WFT population dynamics were similar. Population peak densities were 61 thrips/flower and 75 thrips/flower,
respectively but this difference was not significant.