Based on WBC trap counts, peak flight likely took place over the last 7 days. Though we never know for sure until a week later when moth catches really dropped. That said, comparing this year to previous years, it lands in the same week we have experienced peak flight since 2018 (Figure 1). Peak flight […]
Add stink bugs to the long list of pests showing up to represent in 2021. There have been several reports of brown stink bug being found in IP soys and dry beans. Stink bugs feed by piercing the pods and sucking on the seeds developing inside. They inject digestive enzymes into seeds, causing the seed […]
Western bean cutworm traps catches are starting to increase but are still low compared to previous years with more weeks of moth flight (and egg laying) to come. Those finding eggs in early tassel stage need to wait before spraying since eggs are still going to be laid for another few weeks. It is better […]
Written by: Tracey Baute, Field Crop Entomologist, OMAFRA, Dr. Vojislava Grbic, Associate Professor, Western University and Dr. Ian Scott, Research Scientist, AAFC-London With the exception of the significant rain events in the last week, this year’s hot, dry conditions and early wheat harvest could be priming us for another bad spider mite season in soybeans […]
If you haven’t done so already, it is time to put up western bean cutworm traps to monitor for moth activity. The GLMPMN usually has more WBC traps up and reporting by now to help us understand when adults are active and likely laying eggs in corn or dry beans across Ontario. From the 100 […]
Soybean aphids (SBA) have been reported in a few early planted soybean fields. But that doesn’t mean we need to panic. It has been a few years since we have had major aphid issues so it is good to review what the best management practices are. Especially given one of the main reasons we no […]
Alfalfa weevil and potato leafhopper (PLH) are being reported as extremely high in many fields. Hot dry conditions have made it more favourable for these pests than their natural enemies (especially entomopathogenic fungi). Scout fields to determine if cutting is possible or if an insecticide application is necessary if thresholds are reached. Consider fields at […]
Several US states and Canadian provinces are joining forces to monitor for adult corn rootworm (CRW) beetles this year. Though some US states have been monitoring adult rootworm beetles using sticky traps for several years now, trapping for CRW is relatively new for Ontario. Weekly trap data for all trap sites involved will be collected […]
We are gathering cereal leaf beetle (CLB) data again this year to help validate growing degree day models generated by AAFC-Saskatchewan. If you are out scouting cereal fields this growing season and come across CLB, we want you to let us know where you are finding this pest, what stage and how many you are […]
Rootworm Biology and Impact Corn rootworm (CRW) is a serious pest of continuous corn in Ontario. CRW larvae are the main concern, as they clip roots and inhibit root growth, resulting in poor nutrient and water uptake in the plant. Significant yield loss occurs before these symptoms are even noticed. For every node of […]
This article was written by Dr. Elson Shields, Department of Entomology, Cornell University, Ithaca, NY **A note from Christine: Alfalfa snout beetle is an invasive species. A 2008 survey confirmed its presence in Leeds & Grenville, Prescott & Russell, and Stormont, Dundas & Glengarry counties. At that time, over 150 km2 were infested. Dr. Shield’s […]
This webinar features OMAFRA specialists who provided an update on Bt-resistant corn rootworm, the impact on cropping systems and feed supplies, mitigation strategies to reduce the impact of Bt corn rootworm resistance, and alternative feeding options. While this webinar is open to anyone, it is geared towards cattle producers (dairy and beef). The webinar aired […]
Why be concerned about the Bt resistant rootworm populations showing up in Ontario? Dr. Jocelyn Smith, University of Guelph Ridgetown Campus stands in a field that has cross resistant rootworm. The grower experienced more than 50% yield loss in this 2nd year silage corn field planted with a pyramid hybrid in 2020. Jocelyn discusses the […]
In fields where Bt rootworm corn hybrids have been used for more than three consecutive years, resistance among corn rootworm populations is suspected. Growers can no longer rely solely on Bt hybrids for protection against rootworm injury. The best management practice to reduce the resistant rootworm population is to rotate out of corn for at […]
Extensive injury by corn rootworm (CRW) to pyramid Bt rootworm (Bt-RW) hybrids was observed in several Ontario counties in 2020, suggesting that CRW populations have developed resistance to multiple Bt-RW proteins. The Canadian Corn Pest Coalition (CCPC) and OMAFRA have developed mitigation recommendations for continuous corn producers, in hopes of knocking back the resistant corn […]