Pests

Aphids on Paradise Apple

Malus pumila L. Mill.

Paradise Apple (Malus pumila) is susceptible to infestation by woolly, green, and rosy apple aphids. Resistance to the woolly aphid is provided by the presence of the specific Er1 gene, while the Sd1 gene is associated with resistance to leaf-feeding aphid species.

In the reference 12 varieties crop Paradise apple, where this is mentioned in the description.

On the apple tree species Malus pumila, the most significant pests are the woolly apple aphid (Eriosoma lanigerum), the green apple aphid (Aphis pomi), and the rosy apple aphid (Dysaphis devecta). The woolly aphid infests both the aerial parts and the root system, forming galls on the roots and leaving a characteristic waxy coating. Leaf-feeding aphid species cause deformation and leaf curling, with Dysaphis devecta inducing the appearance of red galls, while the honeydew they excrete creates conditions for the development of sooty mold.

In the breeding of Paradise Apple rootstocks for resistance to the woolly apple aphid, the Er1 gene plays a key role. Literature also highlights the Sd1 gene, which is linked to resistance to the rosy or leaf-feeding species of apple aphid. The presence of these genetic markers is a determining factor when assessing the susceptibility of rootstocks to major aphid species.

General information about the subject — on the page Aphids.

Sources8

Varieties of Paradise apple mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.