Brown Spot of Passionfruit

Alternaria passiflorae

Description:

A fungal disease of stems, leaves and fruit. On leaves it causes round brown spots up to 10 mm diameter. With time these may become more angular, up to 25 mm wide and the centres of the spots become paler, dry and tear. Infections of new growth may kill leaves and old leaves may all fall leaving the vine bare.
Stem spots usually start in the leaf axil, are brown and somewhat corky, elongated, up to 25 mm long and may girdle the shoot resulting in death of that section of vine.
On fruit, the infection starts as round, dark green water soaked spots that become sunken and light brown with a green edge. The fruit may shrivel and fall.

Species Affected:

Passionfruit, Granadilla and other Passiflora species.

Biology:

Favoured by damp weather.

Life Cycle:

Origin and History:

Distribution:

Significance:

Management and Control:

Space vines, thin out bush growth and remove dead vines.
Apply fungicides.

Related and Similar Species:

References:

1291

Acknowledgments:

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