to look for a host. The effect of treatment is thus strongly dependent on how quickly a nematode has found a host. Is the effect visible? Infected…
lower in the greenhouse. 13:00 Vertical placement will have a negative effect on the development of the hives. 10:00 1! Bumblebees need max. 2…
for a couple of hours has a negligible effect on pollination. However, a full day above 30° C has an immediate effect on pollination. If the…
control and reduce the pest pressure,’ Michel states. ‘It had a positive effect in the spring and there was less need for trapping to reduce the…
activity of bumblebees. Specially when they block the early sunlight, the effect is worse. Energy saving screens are often used in greenhouses during…
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