Beneficial nematodes feed on cutworms, root maggots
KEY RESULT:
Native entomopathogenic nematodes (EPNs) have potential for biocontrol of cutworms and canola root maggots, performing fairly well when compared to introduced commercial species.
PROJECT NAME, PRINCIPAL INVESTIGATOR:
“Exploring further possibilities and advancements of using bio-control entomopathogenic nematodes (EPNs) for the management of insect pests in Alberta” Shabeg Briar, Olds College of Agriculture & Technology
FUNDING:
Alberta Canola, Results Driven Agriculture Research
Cabbage root maggot and cutworms can cause developmental delay, lodging and yield losses in canola. Canola growers could benefit from alternative sustainable methods to manage below ground pest populations effectively.
Entomopathogenic nematodes (EPNs) are known predatory nematodes of many insects. This project will assess the management of cabbage root maggots and cutworms using commercially available (Steinernema feltiae and Steinernema kraussei) EPN species and native EPN (s213) strains in both the lab and greenhouse to determine the persistence of EPNs in Prairie soils.
Results
S213 showed comparable efficacy to commercial strains against cutworms – equally effective as S. feltiae and S. kraussei. Moreover, s213 and S. feltiae significantly outperformed S. kraussei in controlling maggots. Regarding persistence, S. feltiae demonstrated superior long-term efficacy, although all strains showed consistent persistence in soil.
This study highlights the potential of native EPNs as viable biocontrol agents. It stresses the importance of considering factors like dose, persistence and impact on plant health in EPN-based pest management strategies.
For growers, the use of EPNs can contribute to integrative pest management through limiting the use of insecticides while protecting canola crops. This can save on chemical costs and contribute to maximum yield potential.
