Pear decline phytoplasma

All pictures by L. Giunchedi - Universita degli Studi, Bologna (IT)
(click on the images to enlarge them)

William pear tree grafted on Kirchensaller showing the 'quick decline' form
of pear decline phytoplasma.

Nursery of 1 year-old pear trees (cv. Butirra Precoce Morettini). In the center: pear decline infected trees showing reddening of the leaves; healthy trees on left and right.

Three year-old Conference pear tree grafted on Quince A showing premature yellow-reddish leaf coloration.

Three year-old Conference pear tree grafted
on Quince A showing premature
yellow-reddish leaf coloration.

Pear tree cv. Abate Fetel grafted on quince
BA29 showing little terminal growth with
sparse light green and slightly
rolled leaves (spring symptoms).

Pear tree cv. Abate Fetel grafted on quince BA29 showing little terminal growth with sparse ligth green and slightly rolled leaves (spring symptoms).

Healthy pear tree cv. Abate Fetel.

Pear tree cv. Abate Fetel grafted on quince C showing abnormal and early red leaf discoloration.

Pear tree cv. Abate Fetel grafted on quince BA29 affected by pear decline.


Pear tree cv. Abate Fetel grafted on quince BA29 affected by pear decline. In the background: an healthy tree.	Japanese pear (nashi) cv. Hosui showing enlarged vein with leaf curl induced by pear decline.

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