The chestnut harvest in the Lot has been about 50-80% down as a result of a parasite. The tiny insect lays eggs in the blossom of the trees, which react by creating a type of scab around the bud. This has the inevitable effect of preventing the development of the nuts. The growers in the department first noticed this in 2012 and since then yields have been going down.
Treatment is available, but will be 6/7 years before any impact is felt.
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