Shothole of Stone Fruit

Stigmina carpophila

Description:

A fungal disease that initially causes small brown spots with reddish rims on leaves. These spots grow and the centre falls out leaving a round shot hole in the leaf. Irregularly shaped holes may be formed where spots overlap.
Round or oval spots that are raised or have raised edges and exude gum may appear on twigs and stems. Twigs may die from girdling.
On Apricot fruit round, brown scabs with exuding gum are produced.
On Almond fruit copious amounts of gum are exuded and the fruit may crack.
On Peach and Nectarine fruit the spots may develop into deep indentations.

Species Affected:

Stone fruit.
Almonds and early flowering Peaches and Apricots are most susceptible followed by Nectarines, Cherries and Plums.

Biology:

Life Cycle:

Origin and History:

Distribution:

Significance:

Management and Control:

Apply fungicides.

Related and Similar Species:

Bacterial Spot looks similar but has more angular spots with an oily sheen.

References:

1291

Acknowledgments:

Collated by HerbiGuide. Phone 08 98444064 or www.HerbiGuide.com.au for more information.