In contrast to most native ladybird species, the Asian ladybird forms several generations a year, depending on the temperatures: in Germany there are three generations, in its native habitat there are five. As a result of climate change, there will also be more generations per year in Europe.
In spring and summer, the voracious Asian ladybirds are very useful because they eat large quantities of aphids. However, when there are no more aphid colonies in autumn, they look for other food sources, preferably grapes. If they are also harvested, they cause flavour defects in the wine.
Incidentally, native ladybirds also benefit from climate change: they eat even more aphids and are better able to convert them into fat reserves for overwintering.
