Tracey Baute August 26, 2009 1173 Comments Off on First Western Bean Cutworm Larvae Found in OntarioMy 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 larvae was from a corn field in Rodney…
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 to another for the last two to three…
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 enter into the R6 stage,…
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 last few weeks. Isabella, Gratiot and Mecosta counties are also considered at risk. Current Michigan WBC…
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 build back up so quickly…
A recent summer migration of soybean aphids in Ontario has resulted in many new fields having a fair number of aphids in them now. Fields that were scouted a week or two ago and were found to have very few aphids could now be closer to threshold than you think. Scouting is advised. Scout Cruiser treated fields too as we…