Hay Hay We’re the……Scarab Beetles!

<a href="/clm/species/popillia_japonica"><em>Popillia japonica</em></a> (Japanese Beetle) adult on cedar.                           Japanese Beetle (Popillia japonica) adults are starting to take flight in southern Ontario!  They have been spotted building in numbers in southwestern Ontario this week. 

DSC_0314  Look for these shiny green and copper beetles feeding on grape leaves, roses and many other trees and shrubs.  Where possible, homeowners can knock adults into a bucket of soapy water (to smother them).  Several insecticides are registered for the adults in the nursery, including Sevin XLR.

<a href="/clm/species/amphimallon_majalis"><em>Amphimallon majalis</em></a> (European Chafer) adult.   European chafer (Amphimallon majale) adults have also emerged. Look for medium brown scarab beetle swarming blooming Linden trees (e.g. Tilia cordata).  Historically we see them around Canada day in the Guelph area so they are right on schedule.

RoseChaferAdultJLA Our good friends, the Rose Chafers (Macrodactylus subspinosus) are also out in full force.  These scarab beetles feed on the flowers, fruit and foliage of several ornamentals.  The larval stage feeds on roots of grasses and weeds (usually a sod nursery pest). Like most scarab beetles, females are more likely to lay their eggs in sandy soils and will avoid egg laying in clay soils.  Sevin is registered as an adulticide in the nursery.  Insecticides for the grub stage of other scarab beetles will also reduce larvae of rose chafer.

<a href="/clm/species/amphimallon_majalis"><em>Amphimallon majalis</em></a> (European Chafer) larva.                                                        Have white grubs (e.g. European chafer, June beetle) OR Japanese Beetle phytosanitary restrictions been an issue at your nursery?

<a href="/clm/species/amphimallon_majalis"><em>Amphimallon majalis</em></a> (European Chafer) larval damage on cedar.                                  Preventative applications of Intercept and Acelepryn are registered for white grubs in nursery and greenhouse production and the application period begins now. (Above photo: European chafer larval feeding damage)

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