Blister Beetles

black blister beetles

Description Blister beetles are very rare in Ontario but have been occasionally found in alfalfa fields north of Lake Erie. They are more common in arid climates, such as the U.S. Midwest, and are often associated with grasshopper infestations. The three most common species are the black blister beetle (Epicauta pensylvanica), the ash grey blister […]

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Ontario Field Crop Report – June 22, 2022

Thrips feeding scars run parallel to the veins of corn leaves. Photo credit: Susan Gowan, Gowan Consulting.

Insect/Pest Update – Current Issues Cereal leaf beetle (CLB) populations have reached threshold in some spring cereal fields this week (Figure 1). CLB larvae and adults feed on the tissue between leaf veins, leaving long scratch marks that can make plants appear silver or frosted from a distance. Before boot stage, the threshold is an […]

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Crop Report – June 15, 2022

Mn deficient leaves turn yellow across the whole leaf, except for the veins which remain green.

Soybean Update Soybeans range from VE (emergence) to the fourth trifoliate leaf stage. The majority of the crop was planted in May, although sporadic showers meant that some could not be planted until June. A few soybeans were planted in April. They are now at the fifth trifoliate leaf stage. Ideally, soybeans should have 6 […]

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Crop Report – June 8, 2022

Figure 1. Purpling of leaves on corn seedlings

Conditions For most of southern and central Ontario, this week’s rains were timely to support crop establishment. Precipitation June 7th ranged from 12 to 50 mm (1 to 2 inch), with regional reports in southern Ontario (Lambton, Middlesex, Bruce and Grey counties) reporting over 50 to 55 mm (2 to 2.3 inch). Cereals Herbicide applications […]

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Black Cutworm Alert – Corn and Soybeans At Risk

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 […]

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Crop Report – June 1, 2022

Early vegetative stages are a great time to scout fields for gaps or delayed plants and troubleshoot for issues that may have led to these.

Conditions Some sporadic rains have occurred across the province this last week. In areas where planting is mostly complete, these rains have generally been well received. Temperature swings between stretches of very warm and cooler weather has continued this spring, though crop heat unit (CHU) accumulation is similar to slightly ahead of normal. Cereals Emergence […]

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May 2022 Forage Report

Weather A derecho hit Ontario and Quebec along the Windsor-Québec City corridor on May 21st. High winds caused widespread power outages in central and eastern Ontario. Damage included downed/uprooted trees, snapped hydro poles, and several collapsed barns. Resources are available to help producers cope with stress and find mental health support. South and West According to […]

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