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Apple tree branch with green leaves affected by a fungal disease rust. A branch of a rusted apple tree. Pest control and protection of gardens from diseases.
The Valley Oak, can sometimes be riddled with large growths along the stem. Small wasps produce these oak apples or galls. The large oak apples, are induced by the gallwasp Andricus californicus. Shollenberger Park; Petaluma Wetlands; Petaluma; Sonoma County; California. Quercus lobata.
Rust caused by Puccinia komarovii on green leaf of Impatiens parviflora (Small balsam)
Leaf Galls on a eucalyptus leaf
A grape leaf showing the galls that are formed during a phylloxera infestation, is a pest of commercial grapevines worldwide.
Focus on nuts.
Aesculus hippocastanum (horse chestnut) leaves
Close up chestnut tree leaves, damaged by leaf- mining moth - horse-chestnut leaf miner (Cameraria ohridella)
Hazelnut blossoms on a tree in Sudtirol
Autumn forest
Close-up of a magnolia fruit on branches in green leaves. High quality photo
ripening arbutuses
Apple tree branch with green leaves affected by a fungal disease rust. Deficiency or excess of elements and microelements of plant nutrition, disease. Rust spots of fungal disease on an apple tree.
Close up of summer tree
close up Fagus Sylvatica in the Lessini Mountains Regional Park near Campofontana, Verona, Veneto, Italy
White Mulberry tree
Rhytisma acerinum on maple leaf
Cork Oak (Quercus suber) tree. Luogosanto. Province of Sassari. Sardinia. Italy.
Leaf mines on horse chestnut leaf. Damage caused by horse chestnut leaf miner (Cameraria ohridella). Leaf in backlit showing details
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Acer pseudoplatanus, known as the sycamore maple is a species of tree native to Central Europe and Western Asia. Leaves and samaras.
oak apple gall from an Oregon Oak that was induced by the California gallfly Andricus californicus, Andricus quercuscalifornicus.
Juglans cinerea, butternut
Early signs of necrosis on this horse chestnut leaf, shown up by back-illumination through the leaf. Only days to go before it forms part of this year's autumn leaf fall.
fresh acorns of Quercus cerris tree
teak leaves are starting to dry out
cupules with soft spined husks at a beech tree in summer
Natural green acorn of unripe wild walnut against a trunk
Rhytisma acerinum fungus on Acer platanoides leaf.
Sycamore Tree and Blue Sky
Free Images: "bestof:Common Spangle Gall - leaf upper.JPG en Neuroterus quercusbaccarum Common spangle gall from upper leaf surface Quercus robur Eglinton Ayrshire Scotland Own"
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