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Farmers should be aware of the potential for cutworm damage

Spring seeding is off to a good start across the Prairies, but producers are being reminded to monitor the crop closely for weed, disease and insect concerns. 

Dr. Meghan Vankosky, a research scientist with a focus on entamology at Agriculture and Agri-Food Canada, says its important that farmers scout their crops on a regular basis.

Cutworms, wireworms, and flea beetles are among the first insects to watch for, if farmers notice any bare patches in the crop as it emerge, they'll want to investigate what's happening and determine the problem, as it could be a sign of cutworm activity.

Vankosky has been hearing reports of cutworms, adding that they tend to overwinter in the larval stage.

"So those great big caterpillars are pretty obvious in the fields if they're present. That's definitely something to be scouting for early in the season. Cutworms can be active even when it's cool, especially for those species that overwinter as larvae. So they could be there and ready to start feeding already. "

She says there tends to be three different strategies that cutworms will use to feed on their host plant. 

"Some of them are feeding above ground. They might climb the plant and then eat the leaves. Or they might be active closer to the soil surface; maybe climb the lower part of the plant and eat the leaves, but they could also be cutting the stem. So those are kind of the first two feeding types. The third type is the subterranean feeding type. You really never see the larvae above the soil surface. The larvae cut the stems of the plants right at the soil surface and then kind of pull the plant underneath the soil to eat it. What we tend to see as kind of the first sign that there could be cutworm activity in a field is parts of the field where there aren't any seedlings as compared to other areas where the seedling emergence is normal. When we start to see those patches where there's no plant, cutworms could certainly be one of the causes of that damage." 

Cutworms can be attracted to a wide variety of crops, as well as fruits and vegetables, herbs, flowers, grasses, and weeds.

Vankosky says producers will want to identify which cutworm species they are dealing with since the economic threshold and management practices can vary.

Dr. Kevin Floate from Agriculture and Agri-Food Canada in Lethbridge has developed an excellent cutworm guide that can be found here. 

A reporting system for cutworms has been set up for farmers in Alberta, as cutworm populations can be difficult to monitor because they are so patchy and can be found one year and not the next.

Alberta farmers that see cutworms in their fields can go to Alberta.ca/cutworm, and follow the link on the page to report cutworm damage and activity.

Vankosky says cutworms are just one of many insects that can pose a problem for producers, adding they are monitoring for other insects and have started to catch a few diamondback moths in phermone traps in southern Alberta.

To hear Glenda-Lee's conversation with Dr Meghan Vankosky click on the link below.

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

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.