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PestWatch Report on August 15, 2017

PestWatch Report on August 15, 2017

Corn earworm are starting to spike in southeastern PA, and remain stubbornly high in Erie County and to the southwest near Pittsburgh.

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Updated: April 9, 2018

Corn earworm trap in Montgomery County, PA. Photo: A. Frankenfield, Penn State

Corn earworm (CEW) counts showed sharp increases in southeast PA, with a dramatic spike in New Danville, Lancaster County That site reached a 3-4 day spray interval. Additional sites suggesting a 4-5 day interval occurred in other sites in Lancaster County, as well as sites in Bucks and York counties. Sites suggesting a 5-6 day interval were reported in Erie and Washington counties. Counts can change rapidly at this time of year.

European corn borer (ECB) counts are low.

Fall armyworm (FAW) counts are also low, except in Erie County, and sites in New York. These appear to be following a pattern of the movement in from the Midwest.

Spray thresholds for CEW are being exceeded in Bucks, Lancaster, York, Erie and Washington counties. The spike in one site in Lancaster County reached a 3-4 day suggested spray threshold. The other two pests, ECB and FAW, are low, except for FAW in Erie County.

Also be aware that brown marmorated stink bug tends to move into sweet corn in August.

County	Farm/Trap Name	CEW 1-Aug	CEW 8-Aug	CEW 15-Aug	ECB 1-Aug	ECB 8-Aug	ECB 15-Aug	FAW 1-Aug	FAW 8-Aug	FAW 15-Aug
Blair	Curryville, PA	0	0	0	0	0	0	0	0	0
Blair	Hollidaysburg, PA	0	0	0	0	0	0	0	0	3
Blair	Tyrone, PA	6	null	0	0	null	0	6	null	0
Bradford	Bristol's Produce	null	0	null	null	2.1	null	null	1.4	null
Bradford	Larue's Produce	null	0	null	null	1.5	null	null	4.2	null
Bradford	Shores Sisters Produce	null	0	null	null	9.1	null
Bucks	Bedminster	0	7	2	0	0	3
Bucks	Buckingham	7	null	45	23.5	null	3
Centre	Harner	2	1.8	null	0	0.9	null	1	0	null
Centre	Rock Springs	2.6	3	null	2	5.3	null	8	2.6	null
Centre	Stormstown	2	5.3	null	0	0	null	16	6.1	null
Clinton	Loganton	null	2	0	null	10.5	6
Erie	Dudas Farm	6	0	1				9	1	9
Erie	Mason	53	38	15				18	22	22
Fayette	Duda's Farm Inc.	17	null	null	10	null	null	0	null	null
Huntingdon	New Morning Farm	14	7	7	49	4.7	7
Indiana	Brush Valley	2	0	4	0	0	1	1	4	5
Indiana	Creekside	0	0	2				2	0	2
Lackawanna	Ransom	0	null	null	3	null	null
Lancaster	Landisville	0	16	6	7	10	1	0	0	0
Lancaster	Neffsville	null	18	21	null	0	2	null	0	0
Lancaster	New Danville	14	42	80	7	4	2	2	0	0
Lehigh	Germansville	18	2	null	0	0	null	3	5	0
Luzerne	Drums	0	1	null	4	0	null
Luzerne	Plains	0	null	null	2	null	null
Lycoming	Linden	0	1	0				1	2	0
Lycoming	Montoursville	4	8	1				1	11	1
Lycoming	Muncy	11	1	0				2	3	5
Montour	Montour	null	2	null	null	0	null
Northampton	Nazareth	null	0	null	null	0.9	null	null	0	null
Schuylkill	Tower City	0	0	0	0	0	0	4	7	0
Washington	Venetia	10	7	22.5						105
Westmoreland	Schramms Farms and Orchard	18.7	null	5.5	3.7	null	0
York	York	null	3.5	45	null	4	2	null	0	0