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Swarthmore College's Little White Grub Problem

Green Team at Green Roof Technology, - Friday, October 26, 2012
A few months ago we were contacted by Swarthmore College to help identify the cause of a disturbance on the roof.  During a routine visit in August about 20% of a large, upper section of a green roof was completely torn up.  The disturbance occurred in areas where low-growing Sedums, such as S. sexangulare, S. album, and S. spurium dominate.  Areas where taller Sedums, such as S. takesimense, S. kamtschaticum grow were left undisturbed.  

Further investigation located the likely perpetrators.  Numerous white grubs were found in soil.  The likely cause of the Sedums being torn up is from birds scavenging for a snack.  The grubs feed off the roots of the Sedums, weakening their ability to resist the damage caused by the birds.  

Our article about the damage inflicted on the green roof and ways to remediate the problem continues in our Autumn 2012 issue of Green Instance.  The Scott Arboretum of Swarthmore College has also written a summary of the events, which can be seen here.

Join Our Team!

Green Team at Green Roof Technology, - Wednesday, October 24, 2012

We have exciting news.  Green Roof Technology is looking for the right individual to join our team.  You can see more details about the position here.  

But suffice it to say, we're looking for an experienced and enthusiastic person to help with all our social media needs and office organization.  

We have been sorely needing someone to help us out with this work for some time now, and with the upcoming year looking busier than ever, this winter is the best time to add to our ranks.  

If you're interested in the position, please email andrew@greenrooftechnology.com, subject Social Media Position.  Be sure to include your resume and cover sheet.


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