Monitoring of dangerous viruses and viroids in German hop gardens
Viruses and, in particular, viroids can significantly reduce hop quality and yield, thus causing commercial losses. The pathogens cannot be combatted by plant protection products and can be spread very rapidly during cultivation work. First infestations have to be detected quickly and snuffed out, especially if new pathogens such as the hop stunt viroid and the citrus viroid IV are involved. Since 2008, the Bavarian State Institute of Agriculture (LfL), Freising, has initiated monitoring for the stunt viroid, important viruses were added later, and testing also included the “new” citrus viroid IV.
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