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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
In southern Germany apple and pear trees have been a part of the landscape for a long time, and are difficult to protect. The decline of apple and pear trees from their landscape can be expensive to replace and could have a negative effect on tourism. In the long-run, fire blight is a very important factor of economy and society. [citation needed]
Sooty blotch and flyspeck is a descriptive term for a condition of darkly pigmented blemishes and smudges caused by a number of different fungi affecting fruit including apples, pear, persimmon, banana, papaya, and several other cultivated tree and vine crops. The greenish black coating resembling soot or flyspeck-like dots grow into irregular ...
The black Worcester pear (also known as Parkinson's Warden and the Worcester Black Pear) is a cultivar of the European pear (Pyrus communis), it may have come to the British Isles via the Romans, but also has been used in heraldry and around the city of Worcester. The dark fruit is mainly used for cooking or culinary uses.
The Callery pear, or Bradford pear, is one of those vampires. Over the years, Callery pear (Pyrus calleryana) has become one of the most widely planted ornamental trees in the US. But over that ...
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]
As the leaves develop, they become increasingly distorted, and ultimately thick and rubbery compared to normal leaves. The color of the leaves changes from the normal green to red and purple, until a whitish bloom covers each leaf. Finally, the dead leaf may dry and turn black before it is cast off. Changes in the bark are less noticeable, if ...
Pages in category "Pear tree diseases" The following 21 pages are in this category, out of 21 total. This list may not reflect recent changes. * List of pear diseases; C.