[CANUFNET] Aphid thresholds

[Shelley Vescio]

We have had an extraordinarily bad year, too, for aphids and scales.  The "sap drop" calls have been off the scale (no pun intended) and the season seems to have been extended.  I would also be interested to find out what other communities are doing about the problem.  This has been a long-standing issue for us and we have stuck to our guns about not removing them or treating them (there are simply too many to treat).   I just wish the problem would go away.
Shelley

Shelley Vescio
City Forester
Thunder Bay, Ontario
(807) 625-2473
svescio at thunderbay.ca

From: CANUFNET [mailto:canufnet-bounces at list.web.net] On Behalf Of Ken Snowden
Sent: October 3, 2013 12:32 PM
To: canufnet at list.web.net
Subject: [CANUFNET] Aphid thresholds

Good morning all,

After a trying year with a prolonged drought, we saw a dramatic increase in calls regarding aphids and issues with the accompanying honeydew.  We are seeking input on thresholds for aphid damage on street trees to develop a baseline for  our IPM program.  I have received information from a few neighboring cities, and have found varying responses that range from budget availability to number of phone calls.  Most online information I find tends to lean towards agricultural crops rather than urban forestry.  We want to help educate our residents and spray only as a last resort but need a well-founded number to use as a baseline.  City of Surrey responded that they use number of aphids per leaf...what are other municipalities using?

Your help would be appreciated,

Ken Snowden
Arbourist II
City of Abbotsford Parks, Recreation and Culture
Phone: (604) 853 5485 ext. 5886
Cell: (604) 626 3945
Email: ksnowden at abbotsford.ca<mailto:ksnowden at abbotsford.ca>

'To exist as a nation, to prosper as a state, to live as a people, we  must have trees'
Theodore Roosevelt


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