PestWatch Report for August 19, 2020

Aug 24, 2020

By Shelby Fleischer

Pyrethroid resistance can be a problem. Use materials with a low bee toxicity rating (‘Bee TR’ in the Veg Guide) when bees are working tassels. Along with controlling worm pests, scout for BMSB, sap beetles, or silk-clipping beetles, and consider pyrethroids or a premix of a worm material and pyrethroid (eg., Besiege or Elevest) for those species.

CEW counts continue to be high. Circle color aligns with CEW thresholds; size is proportional to catch.
ECB counts are low, but with an isolated spot in Susquehanna County, and last week in Union County.
FAW is showing up in isolated hot spots, especially in Erie County, and less so in Indiana and Mifflin counties. FAW makes large, ragged feeding patterns.

7-day moving average: catch/nights trapping, divided by the number of nights with data, times 7. Weeks, where all the average-catch-per-night values are nulls, are treated as if no data exist for that week. Empty cell = no trap for that site. Bold text are sites above CEW threshold or hotspots for ECB or FAW. Italics suggest tighter spray intervals.

County	Town/Farm	CEW	CEW	CEW	ECB	ECB	ECB	FAW	FAW	FAW
		5-Aug	12-Aug	19-Aug	5-Aug	12-Aug	19-Aug	5-Aug	12-Aug	19-Aug
Blair	Tyrone	7	11	14	4	2	0	10	2	5
Bucks	Bedminster	3	5	30	0	0	0
Centre	Harner	46	98	90	0	0	0	18	4	4
Centre	Rock Springs	18	68	30	0	0	0	5	1	5
Clinton	Loganton	1	null	24	null	null	0
Erie	Dudas Farm	12	32	12				7	3	8
Erie	Mason	20	9	30				22	15	29
Indiana	Brush Valley	19	32	*118*				2	0	6
Indiana	Creekside	40	76	*136*	0	0	0	12	8	13
Juniata	Happy Breeze	23	64	null	5	4	null	4	2	null
Lackawanna	Ransom	0	null	null	3	null	null
Lancaster	Landisville	22	31	24	0	1	5	0	1	0
Lancaster	Neffsville	17	41	31	0	0	0	0	0	0
Lancaster	New Danville	25	82	85	0	0	1	0	0	0
Lehigh	Germansville	null	17	4	null	0	0	null	0	0
Luzerne	Drums	0	*106*	47	5	11	5	0	1	0
Luzerne	Plains	8	20	74	2	4	0
Lycoming	Linden	3	45	null				24	7	null
Lycoming	Montoursville	81	65	null				2	1	null
Lycoming	Muncy	38	87	null				6	3	null
Mifflin	Streamside	55	45	58	3	1	2	40	20	12
Montgomery	Souderton	7	20	7
Montour	Washingtonville	32	31	null	3	0	null
Schuylkill	Tower City	0	null	null	1	null	null	0	null	null
Susquehanna	LaRue Farm	null	4	5	null	10	17
Union	Oberholtzer	1	5	28	3	4	5
Union	Lewisburg				1	22	3
Washington	Venetia	92	*200*	*183*
York	York	37	*107*	87	0	0	0	3	2	0

Thresholds

Reproductive (tassel/silk) and late vegetative corn attracts moths. Shorten spray schedules when populations increase. If CEW is not a problem, then consider ECB.

Thresholds Based on CEW	Catch Per Week	Spray Frequency (Days)
Almost absent	1–13	7+
Very low	14–35	5–6
Low	36–70	4–5
Moderate	71–349	3–4
High	> 350	2–3

Thresholds Based on ECB	Catch Per Week	Spray Frequency (Days)
Almost absent	< 14	7+
Very low	15–35	6
Low	36–70	5
Moderate	> 70	4

Source : psu.edu

Video: Spring 2026 weather outlook for Wisconsin; What an early-arriving El Niño could mean

Northeast Wisconsin is a small corner of the world, but our weather is still affected by what happens across the globe.

That includes in the equatorial Pacific, where changes between El Niño and La Niña play a role in the weather here -- and boy, have there been some abrupt changes as of late.

El Niño and La Niña are the two phases of what is collectively known as the El Niño Southern Oscillation, or ENSO for short. These are the swings back and forth from unusually warm to unusually cold sea surface temperatures in the Pacific Ocean along the equator.

Since this past September, we have been in a weak La Niña, which means water temperatures near the Eastern Pacific equator have been cooler than usual. That's where we're at right now.

Even last fall, the long-term outlook suggested a return to neutral conditions by spring and potentially El Niño conditions by summer.

But there are some signs this may be happening faster than usual, which could accelerate the onset of El Niño.

Over the last few weeks, unusually strong bursts of westerly winds farther west in the Pacific -- where sea surface temperatures are warmer than average -- have been observed. There is a chance that this could accelerate the warming of those eastern Pacific waters and potentially push us into El Niño sooner than usual.

If we do enter El Nino by spring -- which we'll define as the period of March, April and May -- there are some long-term correlations with our weather here in Northeast Wisconsin.

Looking at a map of anomalously warm weather, most of the upper Great Lakes doesn't show a strong correlation, but in general, the northern tiers of the United States do tend to lean to that direction.

The stronger correlation is with precipitation. El Niño conditions in spring have historically come with a higher risk of very dry weather over that time frame, so this will definitely be a transition we'll have to watch closely as we move out of winter.