Chestnut Avenue on the Osterdeich

Avenue on the Osterdeich along the Aller. Old horse chestnuts probably around 90 years old. baumkunde.de/baumregister/6655-kastanienallee_am_osterdeich

50 white-blossoming horse chestnuts grow on the Allerdeich, 198 on the Osterdeich and 237 on the Philipp-Simon-Dawosky-Allee, the former fishing dyke. Still. Because over the next few years, the leaf miner and the bacterium Pseudomonas will continue to damage the trees. "They've been plaguing the plants for years," says the tree expert. "It's the interaction of the leaf miner and Pseudomonas," says Hoppenstedt, who knows the pests very well. While the insect ensures that the trees are no longer able to carry out photosynthesis to the required extent by laying their eggs on the leaves, the plants, which are around 60 to 80 years old, absorb the bacteria from the ground. "Pseudomonads often thrive on dead organic material, and they're often found close to roots." And the combination of these two pests kills trees after several growing seasons. "Then fungi develop, such as rattle fungus and oyster mushrooms, which in turn cause white rot in the wood."
Source (October 2016): cz.de/Celle/Aus-der-Stadt/Celle-Stadt/Celler-Kastanien-bald-nicht-mehr-zu-retten

At the Osterdeich there is a 1800m long avenue with chestnuts, probably planted in 1935.