Cultivation tip by Koppert:
Netherlands: Keep Ichneumon wasps ready for coming season
Another one is vigilance: make sure you keep scouting for signs of infections, and do not wait too long for employing the Ichneumon wasps. Be sure to use enough of them to tackle infestations.
Finally, use Trianum to increase the resilience of your crop. If Trianum wasn’t used in propagation, different dosage recommendations apply. Your advisor can give you a more tailored advice.
Source: Koppert Biological Systems. For more information Click here.