This briefly describe and talk about mycophagus Disease caused by mycophagus the la france disease Transmission and pathogenesis of mycophagus

1. MYCOPHAGUS
INTR0DUCTION
 mycophagus are alsocalledasfungal virus,mycophage andfungicidalvirus
 The virusthat infectfungi andreplicate inside fungiare calledmycovirus
 Thisinfectwasfirstknownas la francydisease orwaterystrip
 mycoviruswasfirsttime cultivatedinAgaricusbisporus(amushroom)
 mycovirologyisstudyof viruswhichinfectfungi
 Examplesof mycovirusesincludevirusesinthe generaHypovirus,NarnavirusandMitovirus
, Diaporthe andSsDVRinSclerotiniasclerotiorum).
 Host range Mycovirusesare infectinall fourphylaof the true fungi.ie Chytridiomycota
,Zygomycota,Ascomycota,Basidiomycota
GENERAL CHARACTERISTICS
 Theyare isometricparticles

2.  The majorityof Mycoviruseshave segmenteddouble-strandedRNA (dsRNA) genomes
 Approximately30%have positive sense
 single- strandedRNA (+ssRNA) genome.
SYMPTOMS OF LA FRANCE DISEASE
 Reducedyield
 Slowmycelial growth
 Water loggingof tissue
 Malformation
 Miss shapedmushroom
SYMPTOMS ASSOCIATED WITH MYCOVIRUSES:
 mostlythese are asymtamatic
 Infectionswithfungalvirusesoftenremainpersistentlyunappearintheirhosts.
 Micovirusescanalterphenotypes,suchasreducedgrowth,pigmentation,lackof
sporulation
TRANSMISSION
 since there islackof extracellularmovementfromcell tocell natural vectorsof Mycoviruses
remains unknown.
 Intercellulartransmissionsonlythroughhyphal fusionandcell divisionandspreadvia
sexuallyorasexuallysporeshave beenobserved.
 Vegetativeincompatibilityreactionsinhibithyphal fusionandreduce viral transmission.

3. MOVEMENT OF MYCOVIRUSES WITHIN FUNGI:
 Virusdisseminationinmycelial networksviadoliporesandsepta,as organelleseasily
migrate inbetweenadjacentcells.Viruscanmove withthe cytoplasmandextendsintonew
hyphae.
PATHOGENESIS
 The majorityof Mycovirusfamiliesdonotexclusivelyinfectfungi.
 The familieswhichexclusivelyinfectfungi are Reoviridae Hypoviridae totiviridae.
Narnaviridae etc.

4. 