EuropeanCornBorerTrapping

European Corn Borer Pheromone Trapping for Callaway County 2002

Month	Monday	Tuesday	Wednesday	Thursday	Friday
Mondays date May - 20	-	-	-	Changed to European corn borer lure	-
May – 27	Holiday	3 ECB moths	4 ECB moths	-	4 ECB moths
June - 3	3 ECB moths	-	0 ECB moths	-	1 ECB moth
June - 10	0 ECB moths	-	0 ECB moths	-	0 ECB moths
June - 17	0 ECB moths	-	0 ECB moths	-	0 ECB moths
June - 24	0 ECB moths	-	0 ECB moths	-	0 ECB moths
July - 1	0 ECB moths	-	0 ECB moths	-	-
July 8	2 ECB moths	-	-	0 ECB moths	-
July 15	-	-	-	8 ECB moths	-
July 22	8 ECB moths	-	3 ECB moths	-	2 ECB moths
July 29	0 ECB moths	-	0 ECB moths	-	0 ECB moths
August 5	2 ECB moths	-	0 ECB moths – 1 female in grass	-	0 ECB moths
August 12	0 ECB moths	-	-	2 ECB moths	1 ECB moth
August 19	0 ECB moths	-	-	2 ECB moths	0 ECB moths
August 26	0 ECB moths	-	0 ECB moths	-	1 ECB moths
September 2	Labor Day	2 ECB moths	0 ECB moths	-	2 ECB moths
September 9	1 ECB moth	-	0 ECB moths	0 ECB moths	-
September 16	0 ECB moths Took down trap	-	-	-	-

Trap set up with 2001 lure.

Trap is located one mile west of the Callaway County MU Extension Center.

Predictions on the date of occurrence can be made from these moth captures. Predictions are not accurate on numbers or severity of damage, only timing. Occurrence timing is valuable to make surveys more efficient.

Early season European corn borer (ECB) scouting should begin in mid - Missouri about 11 to 12 days after the first spring moth flight has caught in traps or moths seen in grassy field margins. Check taller corn plants for a flat creamy colored egg mass under leaves near the midrib and small holes in the leaf. If holes are found, pull the whorl and unroll to look for small dark head/light body worms. If 50% of the corn plants are found with one or more borers per plant, treatment may be necessary. Management formulas are available to more accurately predict the value of treatment.

Later season ECB scouting should begin a week to 10 days after moths have been caught in traps. Eggs and larvae are found on later planted corn in July. Tasseling and silking corn is most attractive. Borers are found around the ear zone. Early stages feed on pollen in leaf axils before boring into the stalk or ear shank.

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	Jim Jarman, jarmanj@missouri.edu Agronomy Specialist, (573) 642-0755 Site maintained by: Jen Pauley, pauleyj@missouri.edu Last update: 05/23/02