Eutypa Dieback
Eutypa dieback
Common name
Eutypa dieback
Cytosporina
Gummosis
Limb dieback
Causal agent
It is caused by a wood infecting fungus of genus Eutypa. It causes delayed or stunted shoot growth, especially in grapevine species.
Scientific name
Eutypa lata
Symptoms & Signs
The first symptom of Eutypa dieback is a wedge-shaped canker around open wounds on barks or branches. This delays stem growth and make them stunted. It is more common on young, freshly pruned branches. Severely infected branches produce small, chlorotic leaves with rough margins. It causes the death of spurs, canes, arms, and sometimes the whole trunk.
Transmission
It transfers to other healthy plants through rain, wind, and contaminated tools and hands. The spores usually enter through wounds made through mishandling of pruning tools.
Time of concern
Early spring to late fall
Common hosts
Shiraz
Cabernet Sauvignon
Almond
Apricot
Kiwi
Pear
Willow