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 thro... Continue reading
Ohio colleagues report finding cereal leaf beetle adults and eggs in wheat at various locations there. Ontario usually sees a few hot spots with CLB infestations around the same time that Ohio does so be on the look out.
Best way or worst way to scout, depending on who does your laundry at home,... Continue reading
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 f... Continue reading
I realize that I haven't been blogging lately but I didn't want to bog you down with frivolous things during busy times. That said, I did want to take the time to wish you all a wonderful and safe Holiday. And I wish you nothing but the best for 2010.
If you have a bit of ti... Continue reading
Just wrote an article and completed the map of the distribution of western bean cutworm in the Great Lakes Region. Check it out in the latest CropPest Newsletter at:
.... Continue reading
Anyone out there run some strip trials on soybean aphid this year in Ontario? If you have data you'd like to share with us, please send it to my email .
Our research group has also run trials on some new chemistries and early season thresholds. Once the data is compiled, we will let you know wh... Continue reading
More reports of WBC damage are coming in. Here is an updated list of sites with damage and or larvae found in Ontario:
Chatham- Kent (Dover Centre, Bothwell)
Middlesex (Wardsville, Appin, Glencoe)
Huron (Blyth, Clinton, Exeter, Dashwood, Holmesville, Belgrave)
Bru... Continue reading
Sorry...It's been a few weeks since my last blog but I finally went on holidays. I'm back and want to give you an update. While away, more reports were coming in of western bean cutworm damage being found in Ontario. Others are asking how to scout for the damage this fall so that they can dete... Continue reading
There are a few guys out there thinking that with the cooler nights, SOYBEAN APHIDS will be leaving their fields so they don't need to spray those fields that recently reached threshold. If aphids are staying at threshold levels 3 or 4 days after the initial assessment, you still need to spray. ... Continue reading
We visited the Newbury WBC site last week and it was concerning to see so many plants infested with WBC larvae. There were no external entry holes from the outside of the ear which could fool those who think the ears are clean. Pay extra attention to those ears that are slightly opened a... Continue reading
My summer students are going to be frustrated when they find this out, especially with all of the scouting they have done looking for WBC egg masses and larvae and finding nothing to show for it. But today Adam Pfeffer of Monsanto brought in the first WBC larvae found here in Ontario. The larva... Continue reading
I have had a few calls from some reps and growers who have been amazed and delighted and some who have been frustrated and frazzled this week. But I'm in it with you, believe me. Soybean aphids seem to be very active right now, developing winged generations and have been moving from one field ... Continue reading
The current threshold of 250 aphids per plant and increasing should be followed to the end of the R5 stage of soybeans.
The R5 stage is known as the "Beginning Seed" stage, when the pods on the top 4 nodes of the plant have a tiny seed developing inside them. Once the soybeans start to ente... Continue reading
Some counties in Michigan have been given the recommendation to spray their dry beans due to the high moth counts and observations of pod feeding at some locations. Montcalm County (central Michigan) in particular is at the highest risk with some trap sites capturing over 400-500 moths in the... Continue reading
I have been getting more calls this week with people wanting to spray the aphids just to take care of them..even if they are not at threshold. Most realize that the natural enemies are going to get killed but they also assume 100% kill of the aphids and struggle to understand how the aphids can bu... Continue reading