La galle pointue du hêtre est due à un petit diptère Mikiola fagi qui au printemps pondent sur les feuilles du hêtre.
Après éclosion, la larve provoque la formation d'une excroissance de la
feuille, qui lui servira de protection. A partir d'octobre, la galle se
détache de la feuille et tombe au sol. La larve hiverne toujours à
l'abri de cette excroissance où la nymphose aura lieu.
Elle ne semble pas préjudiciable à l'arbre.
The beech leaf gall midge is due to a small diptera Mikiola fagi which in the spring lay on the leaves of the beech. After hatching, the larva causes the growth of the leaf, which will serve as protection. From October, the gall detaches from the leaf and falls to the ground. The larva always winters away from this growth where pupation takes place.
It does not seem harmful to the tree.
Meurthe et Moselle, juin 2020
Elle ne semble pas préjudiciable à l'arbre.
The beech leaf gall midge is due to a small diptera Mikiola fagi which in the spring lay on the leaves of the beech. After hatching, the larva causes the growth of the leaf, which will serve as protection. From October, the gall detaches from the leaf and falls to the ground. The larva always winters away from this growth where pupation takes place.
It does not seem harmful to the tree.
Meurthe et Moselle, juin 2020
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