Identification Cereal leaf beetle (CLB) adults have metallic, blue-green wings, are approximately 5 mm (1/5 in.) in length, with a reddish-orange head and legs (figure 1). CLB eggs are football shaped and approximately 0.5 mm in length (figure 2). They are laid on the upper surface of the leaf, close to the midrib and start […]
Cereal leaf beetle (CLB) adults and eggs have been spotted at low levels in some of the YEN cereal sites being monitored this year. Best to scout fields with a known history of CLB activity soon and plan to check all cereal fields a few times over the next few weeks until the head is […]
True armyworm (TAW) larvae have been spotted in some winter wheat fields in Chatham Kent and Lambton County. This is in addition to cereal leaf beetle (CLB) larvae reaching threshold in some cereal fields, in some cases causing significant damage. So far reports of CLB reaching threshold have been from fields in the Sombra, Petrolia, […]
Cereal Leaf Beetle and True Armyworm Update Cereal leaf beetle (CLB), and true armyworm are common cereal pests in Ontario. To help support growers in their management of these pests and to better understand their prevalence, 28 fields across Ontario are being scouted weekly for cereal leaf beetle (CLB) and true armyworm (TAW). Crop growth […]
Cereal leaf beetle (CLB) adults have been active and laying eggs over the last month in winter cereals. Though the adult feeding does not cause much injury, expect to start seeing larvae and their leaf feeding start over the next few weeks. My crew just found a few first instar CLB larvae today in one […]
Cereal Leaf Beetle and True Armyworm Update Cereal leaf beetle (CLB), and true armyworm are common cereal pests in Ontario. To help support growers in their management of these pests and to better understand their prevalence, 28 fields across Ontario are being scouted weekly for cereal leaf beetle (CLB) and true armyworm (TAW). Crop growth […]
True armyworm (TAW) has been spotted at near threshold levels in a winter wheat field near Niagara and has also caused significant damage in late planted seedling corn in Chatham Kent. Though most of our YEN wheat sites being scouted weekly have picked up only low levels of TAW in a few of the sites, […]
Some popular insecticides won’t be available for use in field crops in Ontario in 2023. All products containing lambda-cyhalothrin including Matador, Warrior, Silencer, Labamba, Voliam Xpress and Endigo will be limited for use to only horticulture crops in eastern Canada this year. The Pest Management Regulatory Agency (PMRA) re-evaluated lambda-cyhalothrin and end use products in […]
Wheat Pests are Still a Concern True armyworm (TAW) larvae are in many winter wheat and spring cereal fields across southern Ontario, thankfully not always at threshold. Some fields have populations at threshold (4-5 unparasitized larvae smaller than 2.5 cm per square foot) or above and with minimal feeding damage. Larvae sometimes choose not to […]
This was the last breakfast meeting for the Exeter and Mt Forest group. Thank you to everyone who has participated this season, and for adapting to the new Zoom format. Corn Crop advisors are getting a lot of questions right now about leaf wrapping and yellow flash on corn leaves. While this may look similar […]
This article was written by Tracey Baute, Entomologist- Field Crops and Joanna Follings, Cereals Specialist As we continue to scout our cereal crops, reports of cereal leaf beetle and true armyworm in fields are coming in. While most fields are not being found at threshold yet, it is important to monitor your fields and be […]
This article was written by Tracey Baute, Entomologist- Field Crops and Joanna Follings, Cereals Specialist Cereal Leaf Beetle (CLB) is an important pest in cereal crop production feeding on wheat, oats, barley, corn, forages and grassy weeds. CLB overwinters as an adult and then emerges early in the spring and females lay their eggs on […]
The morning of the meeting conditions were sunny across the north, but still cold. Generally, conditions have been sunny and windy so soils have been dry. A rainfall last week provided welcome moisture. There were no major concerns raised regarding grain crop planting and conditions, other than cold temperatures. Some regions are a week or […]
Planting of all crops is much further along than last week, although the general comments about slow progress on fine textured soils are still applicable. Regions with clay soils are dry on top but gummy below, so delays continue. There is rain in the forecast this week for much of southern Ontario so further delays […]
First cut took place on most of the forage acres in southern Ontario. Though this is an effective way to manage alfalfa weevil, this year the larvae were quite small at the time of cutting. I’m concerned that the larvae still present will finally be entering the most damaging stages of third and fourth instars […]