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Selective focus on gall mite, Aceria Quercina, on kermes oak with discolored leaf
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.
Ficus racemosa leaves (Ficus racemosa is a species of plant in the family Moraceae. Popularly known as the cluster fig tree, Indian fig tree or goolar fig)
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 leaf with galls of Gall wasp, close-up.
Leaf Galls on a eucalyptus leaf
Oak galls on an oak leaf close-up
Diseased sycamore tree leaves in close up in late summer.
Selective focus on Red Nail Gall Mite, Eriophyes Tiliae
Valley oak leaf,
Leaf of grapevines with galls of Grape phylloxera, Daktulosphaira vitifoliae
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.
Gall wasps are insects that lay their eggs in plant tissue. This is where growths, known as Gqallen, develop. The larvae of the gall wasps grow in these growths. Most species of gall wasps occur in the Mediterranean region and on the Black Sea, there are no gall wasps in the tropics.
Close-up of an eucalyptus leaf with Mycosphaerellaceae
Macro of galls, gall wasp, infestation of oak leaves in autumn, Cynipidae, Neuroterus numismalis
Sessile Oak (Quercus petraea) - Küre Mountains National Park
Chemically induced distortions on pedunculate oak (Quercus robur) caused by the cynipid wasp Neuroterus quercusbaccarum
Grey alder (Alnus incana subsp. incana) with cones. Macugnaga. Verbano-cusio-ossola. Piedmont. Italy.
Plant Galls on a Oak Leaf, Sierra de Guadarrama National Park, Segovia, Castile Leon, Spain, Europe
Closeup of the veins of a leaf that can be used as a background
The seeds of the Shukui are on the green leaves, North China
Acorns and oak leaves on white background with clipping path included.
Close-up of large Galls on Common oak leaves created by gall wasp Cynips quercusfolii in Estonian boreal forest
The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. The pattern of the veins is called venation. They were once thought to be typical examples of pattern formation through ramification, but they may instead exemplify a pattern formed in a stress tensor field. A vein is made up of a vascular bundle. At the core of each bundle are clusters of two distinct types of conducting cells: xylem and phloem.
Higher Ascomycetes Fungi of the Genus Strigula on avocado tree leaf
Macro image of an eucalyptus leaf with Mycosphaerellaceae
fern spores
Quercus durata, the California scrub oak, or leather oak, is an oak endemic to California. Acorn. Fagaceae.
Cherry galls on oak leaf, caused by gall-wasp (Cynips quercus).
Close up of apple oak gall growing on valley oak, Quercus lobata, in California. Growth of gall is induced by a wasp larva inside the gall.
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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