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These galls are produced by tiny Cynipid wasps, which go through a complicated life cycle involving two stages of development. In June, a generation of male and female wasps hatch from currant galls. The adults mate and the female lays fertilized eggs on the undersides of oak leaves. These cause the creation of the spangle galls, in which the grub matures. The spangle galls fall from the leaves in September and the wasp continues to grow within the leaf litter, producing a female-only generation in the following spring.
Plant Galls on a Oak Leaf, Sierra de Guadarrama National Park, Segovia, Castile Leon, Spain, Europe
Autumn leaf with Oak galls or Oak apples macro on asphalt. Cynips quercusfolii gall balls on oak leaf
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.
oak-apple, oak-gall on a leaf
Yeast cells - 3d rendered image SEM (scanning electron micrograph) view of cells of brewer's yeast (Saccharomyces cerevisiae). It is used in the production of beer, wine and bread.
Oak apple or oak gall is a type of gall caused by gall wasp. Oak galls have been used in the production of ink since of the Roman Empire.
Colorful autumn leaves.
A dry leaf in the forest digested by bacteria, you can see the structure of the leaf in detail, Poland
Fallen wild fruit seeds and shoots growing on forest ground
A group of three Oak Galls, or Oak Apples, on a small young oak tree. Taken in a woodland in West Yorkshire, UK, with a Canon EOS 700d digital camera.
Quercus durata, the California scrub oak, or leather oak, is an oak endemic to California. Acorn. Fagaceae.
Oak gall
A single fruit capsule of a Coliguay Tree (Colliguaja odorifera) in late winter in central Chile, near the capital Santiago. The developing fruit has been invaded by the tiny Chalcid wasp, Aprostocetus colliguayae, that has caused a swollen gall to develop and protect the growing wasp larvae, effectively sterilising the fruit capsule of the Coliguay plant.
Three oak apples or oak galls on a oak leaf. They are caused by chemicals injected by the larva of gall wasp. Oak galls have been used in the production of iron gall ink since at least the time of the Roman Empire.
Diseased sycamore tree leaves in close up in late summer.
Cherry galls on oak leaf, caused by gall-wasp (Cynips quercus).
Armillaria Mellea fungi in early stage
03 november 2022, Basse Ham, Thionville Portes de France, Moselle, Lorraine, France. It's fall. On the ground, some dead oak leaves are parasitized by a Cherry Gall larva. The cocoon forms a small ball, attached to the leaf. The larva will overwinter there.
Oak fruit lies on the ground in the moss
Biorhza pallida on Quercus robur
Blauglockenbaum - Paulownia tomentosa
Oak galls on an oak leaf close-up
Autumn leaf colors against a black background
Gallapfel im Herbst auf einem Eichenblatt mit Farn
Close-up of an eucalyptus leaf with Mycosphaerellaceae
The Folii gall ball is formed by the fertilized larva of the oak gall wasp (Cynips quercusfolii).
Picking pears in plantation avoiding the bad ones
Oak gall
Lycogala epidendrum
Free Images: "bestof:Oak marble galls 1.JPG Oak Marble galls one with Phoma gallorum fungal attack Chapeltoun North Ayrshire Scotland self-made - Roger Griffith 07-02-08 Rosser1954"
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