Insect Pests
Plant-parasitic nematodes are hidden yield robbers. But research and monitoring efforts are helping to uncover their secrets. Plant pathologist Albert Tenuta conducted a survey of soil-dwelling nematode species in Ontario crops and his ongoing collaborative research looks to improve management strategies for these microscopic, worm-like pests.  
Flea beetles (Phyllotreta spp.) in canola and cutworms continued to be at economical levels in many areas of Manitoba in 2017. Aphids were at high levels and resulted in insecticide applications in small grain cereals, field peas and soybeans. Diamondback moth (Plutella xylostella) were controlled in many canola fields. Bertha…
Evidence of feeding in 2017 once again was over a wider range than in previous years. The range of pea leaf weevil activity has expanded dramatically in central Alberta since 2013.The annual pea leaf weevil (Sitona lineatus L.) survey was carried out in late May and early June, 2017. The…
The wheat midge forecast for 2018 shows an overall lower level of wheat midge across Alberta. There is very little risk of midge in the Peace Region, with the lowest level of midge found in the survey since the outbreak in 2013. Individual fields or small pockets of wheat midge…
As swede midge populations continue to rise in Quebec, canola growers are looking for better ways to manage the pest. Entomologist Geneviève Labrie is leading a two-year research project to help advance integrated management strategies for swede midge.
Earlier this summer (Week 14), true armyworm, Lepidoptera: Noctuidae: Mythimna unipuncta, was reported on the lower west coast and a summary was provided by Tracy Hueppelsheuser from the B.C. Ministry of Agriculture.Hueppeisheuser kindly provided an update to the situation.... The initial true armyworm damage reported earlier did not relent and…
Armyworms have arrived in the Fraser Valley. Common armyworm (or true armyworm) is the larval stage of the moth Mythimna unipuncta. The worms were first discovered in B.C. on Vancouver Island in the summer, but in recent weeks some farmers have found them in the Fraser Valley from Delta to…
A groundbreaking new method for controlling flea beetle, the pest that causes at least $300 million in damage in North American canola every year, may hit growers’ fields early in the next decade.RNA interference, or RNAi – a process by which RNA molecules “silence” genes targeted as threats – has…
The yield potential of hybrid canola continues to push higher, begging the question of whether economic thresholds for lygus bug developed in the 1990s are still valid today. With more vigorously growing crops, higher yield and relatively high canola prices, new research has found the current economic threshold level of…
Swede midge first appeared in canola in Ontario in 2003, and recent extreme populations in northeastern Ontario resulted in the Ontario Canola Growers’ Association (OCGA) strongly recommending in 2015 that producers avoid growing canola for three years across the New Liskeard area in an attempt to suppress swede midge populations.
The number of bertha armyworm larvae on a farm last year is not a reliable indicator of what to expect this year. Bertha armyworm populations fluctuate widely from year to year.Provincial monitoring programs raise awareness of potential outbreaks, based on number of adult moths caught in pheromone traps. Adult counts…
Globalization of the Arctic, emergence of invasive microbial pathogens, advances in genomic modification technology, and changing agricultural practices were judged to be among the 14 most significant issues potentially affecting how invasive species are studied and managed over the next two decades. | READ MORE
A Canola Agronomic Research Program (CARP) project on cutworms is now completed, resulting in "The Cutworm Booklet," which will help producers identify and control cutworm species, and give them a better understanding of the role of natural enemies in the control of the various cutworm species.
Set out a free smorgasbord and see who shows up. In the case of fababean, as acreage has risen, pea leaf weevil and lygus bug have been coming to dinner. For producers, the main concern with pea leaf weevil is feeding on nitrogen-fixing nodules, while for lygus bug, the economic…
Cutworm management starts with identification – knowing what species is at work in your fields helps unlock information that improves cutworm scouting and management. Knowledge of cutworm biology, behaviour, preferred habitat, impacts of weather and interaction with its natural enemies will all improve scouting techniques and pest management decisions for…
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