Insect Pests Found on Maine Cranberry Beds

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Insect Pests Found on Maine Cranberry Beds
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Cranberry Tipworm - Dasineura oxycoccana (Johnson)
Cranberry Fruitworm - Acrobasis vaccinii Riley
False Armyworm - Xylena nupera (Lintner)
Blackheaded Fireworm - Rhopobota naevana (Hubner)
Hill Fireworm - Tulsa (=Tlascala) finitella
Cranberry Girdler - Chrysoteuchia topiaria (Zeller)
Gypsy Moth - Lymantria dispar
Cranberry Weevil - Anthonomus musculus (Say)
Cranberry Blossomworm - Epiglaea apiata (Grote)
Spanworms (green spanworm, horned spanworm, chainspotted geometer, etc.)
Sparganothis Fruitworm - Sparganothis sulfureana (Clemens)

First Dates
(Dates when active insects were found for the first time during each indicated year on any commercial cranberry bed)
* = 1st day scouting

False Armyworm

6/6/1997	5/28/1998	5/28/1999*
5/24/2000	5/31/2001	5/13/2002*
5/24/2005	5/25/2007	5/14/2008

Gypsy Moth

5/29/2000	5/20/2001	6/13/2002
6/12/2006	6/6/2007

Humped Green Fruitworm

5/31/1999	6/2/2000	6/8/2001
6/7/2002	6/7/2005	5/25/2007

Cranberry Weevil
Dates 1st found over the years:

0 in 2000	6/8/2001	6/13/2002
6/20/2007

Blackheaded Fireworm
(1st-generation):

6/12/2006

5/25/2007

5/14/08

(2nd-generation):

7/27/2004

7/6/2005

7/5/2007

Spanworms

6/7/2005

5/24/2006*

5/28/08

Specific Spanworms:

Chainspotted Geometer: 7/24/2002
Green Spanworm: 6/20/2007
Isturgia truncataria (Walker): Dates the Moth was 1st found (and only dates found so far) over the years:

5/24/2000

5/16/2005

5/24/2006*

5/20/2008

Cranberry Blossomworm

6/2/2000	6/8/2001	5/29/2002
5/24/2006*	6/6/2007

Sawfly larvae
(Action threshold is 30 to 40 per 25 sweeps) (Found in Maine in June)
NOTE: Adult is a small wasp; Have not ever been found at threshold yet in Maine, though it was close once in 1999.

6/20/2007

If you have comments or questions about this page,
contact Charles Armstrong at: charlesa@umext.maine.edu

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These pages are currently being maintained by the Pest Management Office, University of Maine Cooperative Extension. Page Last Modified: 05/28/08