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2. Tree injection - Wikipedia

   en.wikipedia.org/wiki/Tree_injection

   Trunk injection or endotherapy also known as vegetative endotherapy, [1] [2] [3] is a method of target-precise application of pesticides, [4] [5] [6] plant resistance activators, [7] or fertilizers [8] into the xylem vascular tissue of a tree with the purpose of protecting the tree from pests, or to inject nutrients to correct for nutrient deficiencies.

3. List of pear cultivars - Wikipedia

   en.wikipedia.org/wiki/List_of_pear_cultivars

   a hybrid of the Chinese "sand pear", P. pyrifolia and probably 'Bartlett'. Hardy in Zones 4–9. eating, canning, baking: 170–190 Kikusui [20] Kikisui: Pyrus pyrifolia. Not suitable for shipping. eating: Kosui [141] [167] (幸水) Russet apple pear National Institute of Fruit Tree Science, Japan: c. 1959

4. Quercus agrifolia - Wikipedia

   en.wikipedia.org/wiki/Quercus_agrifolia

   Quercus agrifolia, the California live oak, [3] or coast live oak, is an evergreen [4] live oak native to the California Floristic Province.Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. [5]

5. Frangula californica - Wikipedia

   en.wikipedia.org/wiki/Frangula_californica

   The fruit is a juicy drupe about 7–9 millimetres (1 ⁄ 4 – 3 ⁄ 8 in) in diameter, normally forming in pairs or clusters. [10] The fruit may be green, red, or black depending on ripeness. Berries fully ripen in early fall, but can be challenging to collect due to birds who use the fruit as a resource. Ripening occurs mainly from July to ...

6. Pear - Wikipedia

   en.wikipedia.org/wiki/Pear

   The pear tree and shrub are a species of genus Pyrus / ˈ p aɪ r ə s /, in the family Rosaceae, bearing the pomaceous fruit of the same name. Several species of pears are valued for their edible fruit and juices, while others are cultivated as trees. The tree is medium-sized and native to coastal and mildly temperate regions of Europe, North ...

7. Gymnosporangium sabinae - Wikipedia

   en.wikipedia.org/wiki/Gymnosporangium_sabinae

   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.