This video explains how to manage potato leafhoppers in alfalfa fields.
The potato leafhopper
The potato leafhopper is an insect found in North America that can cause significant damage to alfalfa crops.
Both nymphs and adults feed on plant sap, which can stunt their growth and reduce their yield.
Severe infestations can cause plants to die.
Leafhopper life cycle
The potato leafhopper has a life cycle of 30 days.
Adults lay their eggs in alfalfa stems.
The nymphs hatch and feed on the plant for about 8 weeks.
Adults live for about 30 days.
Integrated leafhopper management
There are several integrated potato leafhopper management methods:
Screening: It is important to monitor alfalfa fields regularly for early signs of infestation.
Trigger threshold: There is a trigger threshold for chemical treatment. Treatment is only recommended if the leafhopper population exceeds this threshold.
Resistant cultivars: There are alfalfa cultivars that are resistant to potato leafhoppers.
Biological control: It is possible to use natural leafhopper predators, such as predatory bugs.
Herbicides: There are herbicides that can be used to control leafhopper populations. However, it is important to use them with caution, as they can also harm other insects and the environment.
Recommendations
Start screening early in the season.
Use resistant cultivars.
Apply herbicides only when necessary.
Consult your local agronomist for more specific advice.