{ { Taxobox
| name = Eutypa lata
| regnum = Fungi
| phylum = Ascomycota
| classis = Sordariomycetes
| subclassis = Xylariomycetidae
| ordo = Xylariales
| familia = Diatrypaceae
| genus = Eutypa
| species = E. lata
| binomial = Eutypa lata
| binomial_authority = (Pers.) Tul and C. Tul.. | synonyms_ref = | synonyms = { { Collapsible list | title = synonyms (in date order) |Sphaeria papillata |Sphaeria lata |Sphaeria fuliginosa |Sphaeria milliaria |Nemania lata |Stromatosphaeria lata |Hypoxylon latum |Sphaeria lata var. arundinis |Diatrype lata |Diatrype milliaria |Valsa lata |Valsa mauroides |Valsa milliaria |Valsa fraxini |Valsa myriocarpa |Valsa rhodi |Eutypa rhodi |Eutypa ambigua |Eutypa rhodi f. corni-sanguinea |Diatrype macrothecia |Cryptosphaeria myriocarpa |Eutypa ambigua |Eutypa fraxini |Eutypa fraxini f. arbuti |Eutypa lata var. arundinis |Eutypa mauroides |Eutypa milliaria |Eutypa rhodi var. corni-sanguineae |Cryptosphaeria crepiniana |Cytosporina milliaria |Cytosporina myriocarpa |Valsa ambigua |Eutypa lata var. macrochloae |Engizostoma ambiguum |Engizostoma crepinianum |Engizostoma fraxini |Engizostoma latum |Engizostoma mauroides |Engizostoma milliarium |Engizostoma myriocarpum |Engizostoma rhodi |Libertella blepharis |Cytosporina ribis |Eutypa lata var. andina |Eutypa lata var. rimulosa |Cytosporina lata |Eutypa lata var. ribis |Eutypa lata f. platani |Eutypa armeniacae |Phomopsis ribis |Eutypa lata var. aceris' }} }}Eutypa lata is a fungal plant pathogen of grapevines. The fungus also attacks many other hosts such as cherry trees, most other Prunus species, as well as apples, pears and walnuts. In apricots, the fungus reveals a canker surrounding a pruning wound.Eutypa lata was first found in Californian grapevines by English et al.1962, a few years after its discovery elsewhere. Travadon et al., 2011 finds that E. lata'' is an entirely or almost entirely sexual population here but asexual reproduction may be a rare occurrence.
It causes 'Eutypa dieback' in New Zealand grapevines as well.
The fungus was difficult to identify on the basis of colony morphology and could be out-competed by other fungi when isolated from wood. DNA isolated from one year old canes can be used instead.