The usage of mycoviruses in biological control against tree pathogenic fungi

Mycoviruses are common obligate parasites in many organisms including plant pathogenic fungi. they are mostly spread intracellularly via asexual and sexual reproduction of the fungi and cause some changes on them. although many mycoviruses have no clear effect on their hosts, there are also many reports that they cause some phenotypic chances. especially, they have effect on plant pathogenic fungi by increasing or decreasing their virulence. when they reduce the virulence of the host like in chestnut canker sample, it is possible to use them in biological control. in this review, mycoviruses detected on some important fungal pathogens of forest trees both in our country and world were introduced and the studies carried out were summarized.