Webinar: What are the new threats to the walnut in Bulgaria?

Recently, two significant enemies of walnut trees have appeared in Bulgaria - the Asian walnut moth (Garella musculana) and the walnut fly (Rhagoletis completa), which pose a serious threat to walnut production. Both species, native to Central Asia and North America respectively, have expanded their range in Europe in recent decades, affecting countries such as Ukraine, Turkey, Romania and now Bulgaria. This became clear during an online seminar of the National Agricultural Advisory Service (NAA) regarding the new threats to the walnut in Bulgaria. The Asian walnut moth is particularly dangerous for young walnut trees, said Prof. Rumen Tomov from the Faculty of Agronomy of the Forestry University. Its larvae attack both young shoots and fruits, and yield losses can reach 80%. The larvae feed on the outer green layer of the fruit, which prevents their normal development and often leads to premature dropping. This enemy has been observed in areas with suitable climatic conditions ...