The reticulated oak bug was observed this summer in Franche-Comté. This tiny insect is not harmful to humans but it contributes to weakening our oaks by causing its leaves to turn white.
The reticulated stink bug is an insect measuring no more than 4 millimeters, native to North America. It settles under the oak leaves, biting and sucking the contents of the oak leaves, causing the leaves to turn white. The oak therefore has difficulty carrying out photosynthesis and is weakened as a result.
In its natural environment, the reticulated bug is confronted with predators, notably fungi, which do not exist here. Knowing that females can give birth to around ten babies four times a year, the progression is exponential.
The reticulated bug is easily deposited on walkers without any impact on humans. The problem is that it is very mobile thanks to visitors to the forest. Moreover, we follow its progress along the highways.
The first observations in France were made in the South-West, in 2017. In Europe it was in 2001 in Italy according to Mathieu Mirabel of the DRAAF BFC (Regional Directorate of Food, Agriculture and Forestry Burgundy Franche-Comté).
We are at the beginning of the infestation in Burgundy Franche-Comté. Each time you encounter oaks with bleached leaves, please report your observations, specifying the location of the observation so that we can follow the progression of the reticulated oak bug. The regional correspondents of the DRAAF are at your disposal, you will find the directory with their contact details on this link.
France
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