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Like many rusts, G. sabinae requires two different hosts to complete its life cycle from year to year. Juniper is the winter host and pear is the summer host. Spores (called aeciospores) are produced from the fungal lantern-shaped growths which protrude from the blisters on the underside of the pear leaf which become airborne and infect junipers.
Black rot, leaf spot and canker Botryosphaeria obtusa Sphaeropsis malorum [anamorph] Black spot (of Japanese pear) Alternaria alternata. Blister canker Helminthosporium papulosum. Blister disease Coniothecium chomatosporum: Blue mold rot Penicillium spp. Penicillium expansum. Botrytis spur and blossom blight Botrytis cinerea
Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide ... It causes leaf blisters on pear trees. [1] [2]
The leaves are compound with up to 10 pairs of leaflets, which are elliptic about 5–7 centimetres (2.0–2.8 in) long and 2–3 cm (0.79–1.18 in) wide. Its highly ornamental seeds mean it's sometimes referred to as the black pearl tree or velvet-seed tree.
Dacryodes edulis is a fruit tree in the family Burseraceae native to Africa.Its various regional names include safou (Republic of the Congo, Democratic Republic of the Congo and Angola), messa, plum (), atanga (Equatorial Guinea and Gabon), ube, elumi/rukuki (), [2] [3] African pear, bush pear, African plum, nsafu, bush butter tree, or butterfruit.
Psylla pyri damages pear trees by sucking the plant sap; leaves are yellowed and distorted and flower buds and fruitlets are shed. The excess honeydew produced by the insects coats the leaves, covering up the stomata, and encourages the growth of sooty mould. The size of fruit is decreased and tree growth is diminished. [2]
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Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. Help. Pages in category "Pear tree diseases" The following 21 pages are in this ...