Dead arm, sometimes grape canker, is a disease of grapes caused by a deep-seated wood rot of the arms or trunk of the grapevine. As the disease progresses over several years, one or more arms may die, hence the name "dead arm". Eventually the whole vine will die. In the 1970s, dead-arm was identified as really being two diseases, caused by two different fungi, Eutypa lata and Phomopsis viticola (syn. Cryptosporella viticola).
| Dead arm of grapevine | |
|---|---|
 | |
| Common names | grape canker Eutypa dieback Phomopsis leaf Cane spot Fruit rot disease Eutypiosis |
| Causal agents | Eutypa lata and Phomopsisviticola |
| Hosts | Vine, Prunus, apples, pears, walnuts, pistachios |
| EPPO Code | PHOPVI |
| Distribution | Australia, North America |
https://en.wikipedia.org/wiki/Dead_arm_of_grapevine
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