बेयाव माइटस , सिप्रं टेल्स , बिटिल , खानस्रिफोर बादि एमफौ बायदिफोर सोमजियो , जाय मैखुन हारिनि सोमजिनायखौ खम खालामनानै रांखान्थिनि खहा खालामो ।
They are primarily affected by flies , mites , spring tales , beetle , nematodes which cause economic damage by reducing the production of mushroom varieties .