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Alternatives to Lambda-Cyhalothrin for 2023
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Field Pea Insect and Disease Identification Guide
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Assessing Grasshopper Damage
Pest Species in Manitoba There are 85 grasshopper species in Manitoba, but only four have the potential to become crop pests, including the migratory, twostriped, clearwinged and packard grasshoppers. These species are not to be confused with katydids and leafhoppers, which are also commonly found in Manitoba. And not all of these pest species feed…
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Insecticide Resistance in Soybean Aphids
John Gavloski, Entomologist, Manitoba Agriculture and Resource Development – Summer (June) 2021 Pulse Beat WITH ANY INSECT, pathogen or weed, repeated exposures to the same chemical will eventually lead to some individuals developing resistance to the chemical. Over time these can become the dominant portion of the population, reducing the effectiveness of the chemical. Resistance can…
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Faba Bean Insect and Disease Scouting Calendar
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How Natural Enemies Respond to Soybean Aphids During High- and Low-Aphid Years
Crystal Almdal and Alejandro C. Costamagna, Department of Entomology, University of Manitoba – Summer (June) Pulse Beat 2020 Soybean aphids are an invasive species and major pest with the potential to reduce soybean yields up to 40%. The soybean aphid was first detected in North America in 2000 and has since spread throughout the United…
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Faba Bean Pest Management
Weed Control Early-season weed control is important for faba beans, as they are relatively poor competitors. Reduced plant emergence under dry conditions, for example, can further reduce competitive ability of the crop. Tips on weed control in faba beans: Use pre-plant herbicides to improve early-season competition and avoid the need for broadleaf weed control in-crop.…
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2019 Review of Insects in Pulse and Soybean Crops in Manitoba
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Dry Bean Insect and Disease Scouting Calendar
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Field Pea Insect and Disease Scouting Calendar
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Cutworms in Pulse and Soybean Crops
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Scouting for Early Season Insects
There are generally few early season insects we need to worry about in pulse and soybean crops grown in Manitoba. These include wireworms, seedcorn maggot and cutworms. Of these insects, insecticide seed treatment will provide potential control of only wireworms and seedcorn maggot. However, it is important to scout for all three of these insects…
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Pea Leaf Weevils
Life Cycle of the Pea Leaf Weevil In spring, pea leaf weevil adults fly in from overwintering sites (perennial legume crops) to their host crops, peas and faba beans. Once they start feeding on these host crops, they begin laying eggs. Larvae hatch from eggs and burrow belowground to feed on root nodules, reducing nitrogen…
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Scouting for Pea Aphids
Identification Pea aphids are a sporadic pest of field peas, faba beans and lentils in Manitoba that overwinter in perennial legumes. Once hatched, adults may fly to neighbouring pea crops. Pea aphids tend to feed on the newest leaf tissue and most sensitive, yield-producing parts of the plant. They can cause yield loss by feeding…
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Two-Spotted Spider Mites
Two-spotted spider mites (Tetranychus urticae) can be a sporadic pest of soybeans and dry beans in Manitoba. They prefer hot, dry weather and may appear from July to August, if conditions are favourable. Infestations usually begin at field edges and move inward. Examine several areas of the field to determine the level of infestation. White…
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Disease and Insect Identification Guide (Saskatchewan Pulse Growers)
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