DISEASES OF PEACH
1 Leaf curl : Taphrina deformans
1. Leaf curl
C.O. : Taphrina deformans
Class : Taphrinomycetes
Order : Taphrinales
Family : Taphrinaceae
Â» Diseased leaves can usually be identified soon after
they emerge from the bud, due to their red color and
Â» As the leaves develop, they become increasingly
distorted and ultimately thick and rubbery compared
to normal leaves. The colors of the leaves change from
the normal green to red and purple.
Â» Fruit may fail to develop from diseased blossoms, or
may be affected, showing a reddish color.
v’ Temperature : Below 19Â°C.
v Cool and wet winter
* PSI: Infected leaves, bark, buds,twigs. Ascospores
Â« SSI: Rain and wind Conidia
* This pathogen is called monocyclic, meaning these
fungal spores infect peach leaves only once a year in
mycelium and inascus
Conidium ascogenous cells
host tissue 5 SN â€”
3 Healthy and
7Â° Conidium Layer of asa
leaf and fruit
f Owerwintering & Conidium
\ on buds or
twigs Plum pocket
Buddin Ir Qspore
Â» The most effective method is to plant peach trees
possibly covered by a mat during the winter, to keep
winter rain away from the buds before they burst
(incidentally to delay blossoming until spring frosts
Â» Copper based mixtures (such as bordeaux mixture)
and lime sulphur are two fungicides commonly used.
Â» Peach cultivars can be planted which show some
resistance to peach leaf curl, or at least regenerate
rapidly, such as Peach ‘Benedicteâ€™.