This cooler, wet weather seems to have delayed plant growth but also has been ideal for pests to build in fields or do more feeding while the plant growth is slowed. Cereal aphids have been spotted in several fields from Harrow to Stratford. Though cereal aphids can often be found at low levels in cereals, […]
Black cutworm (BCW) and true armyworm (TAW) moths have been making their way into Ontario over the last few weeks. Black cutworm in particular have been arriving since mid April in southwestern Ontario, with trap counts increasing weekly. Shout out to our new northern Ontario trap participants at the New Liskeard, Thunder Bay and Emo […]
It is safe to call 2024 a good pest year. Mild winters and warm springs tend to help pests overwinter well or expand their range further than usually and get ahead of crops when soil conditions delay planting. Armyworm and cereal leaf beetle are continuing to show up in some wheat fields, while some grubs […]
The Great Lakes and Maritimes Pest Monitoring Network (GLMPMN) website has been upgraded and has a new permanent link: https://experience.arcgis.com/experience/7164d23d488246d198dcf7a07d8c9021 Please bookmark this new link and use it going forward to enter any trap sites and trap data. The same link should work well for both desktop browsers and mobile devices. Everything is still the […]
Reports are coming in that black cutworm larvae are cutting corn and even soybeans. We don’t often see cutting in soybeans but two fields in Niagara region were reported today with significant stand loss and a variety of sizes of larvae (Figures 1 & 2). Fields not treated with an insecticide seed treatment or planted […]
The storm fronts that pushed up from the southern states over the last month not only carried rain with them but also carried in black cutworm moths. Trap catches have been higher than normal this year in neighbouring states, indicating a higher risk this spring for Ontario. Once they arrive, the adult moths look for […]
When springs are cool and wet, it results in two things. 1) Difficulty with getting good weed control in before planting and 2) Pushing planting into cooler soils that may cause the seed to sit for a while. Both of these can increase the risk for early season pest issues. Here are some of the […]
I’ve had a few calls in the past few days asking about armyworm and black cutworm damage in soybeans. I had the chance to get out to a few fields and found that the damage is being caused by the variegated cutworm (Peridroma saucia). The variegated cutworm is another migrating moth that comes into Ontario […]
Alfalfa Weevil Reports from Michigan and Iowa indicate that alfalfa weevils were activity is early this year. We’ve had some fairly warm weather earlier this spring and the weevils likely have had a bit of a head start. I was out in some fields in Oxford this week and I found some early instar larvae […]
It’s been quite a week and it’s only Tuesday. Many of you are calling about one of these pest issues so hopefully I can help answer all of your questions here. Grass Sawfly in Wheat: Once you start to see sawfly feeding (see previous blog for pics and details) the feeding damage is nearly done. […]
Lots of reports are coming in of black cutworm and armyworm damage in Ontario. Black cutworm has been found feeding in numerous corn fields and even an alfalfa field. Locations that I know of so far include fields near: Parkhill, Watford, Embro (alfalfa field), Renfrew County, and parts of West Elgin. True armyworm has also […]
States to the south of us have been reporting intense black cutworm moth captures over the last few weeks. The continuous storm fronts that keep moving across Ontario could be carrying some of these moths to us. In addition, rain has kept us from getting into the fields to manage the annual weeds (especially chickweed) […]
Calls continue to come in of feeding damage found even in corn larger than 5 leaf stage. Some of the larger plants (6-7 leaf) are being mined into at the base of the plants and smaller plants are being cut off. In most of the cases, the culprit is black cutworm. Though it is odd […]
Thanks to Nick Zwambag for commenting on here that they are seeing cabbage seedpod weevil activity in winter canola near thamesville earlier this week. But with this weather, little can be done about it and fortunately the cool temps should slow them down a bit. Scout once this front goes through and see what infestations […]
What a spring so far. Things are happening fast. Given the warm start to the season, we should expect an early start for many of our early season insect pests too. Consider scouting at least 2 weeks earlier than norm. Alfalfa weevils should be active shortly if they are not already (anyone find any yet?). […]