Now this has been a huge problem for many years, basically since the late 1980s, when the varroa mite came and brought many different viruses, bacteria and fungal diseases with it.
Ini telah menjadi masalah besar selama bertahun-tahun terutama sejak akhir 1980-an, saat varroa mite muncul dan membawa banyak penyakit akibat berbagai jenis virus, bakteri, dan jamur.