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The common spangle gall on the underside of leaves and the currant gall on the male catkins or occasionally the leaves, develop as chemically induced distortions on pedunculate oak (Quercus robur), or sessile oak (Quercus petraea) trees, caused by the cynipid wasp [1] Neuroterus quercusbaccarum which has both agamic and bisexual generations.
Callirhytis perfoveata, formerly Andricus perfoveata, the leaf ball gall wasp, is a species of hymenopteran that produces leaf galls on oak trees in California in North America. [1] The wasp oviposits on coast live oak , interior live oak , and occasionally on California black oak , and induces what appears to be a roughly spherical gall ...
Cronartium quercuum, also known as pine-oak gall rust is a fungal disease of pine (Pinus spp.) and oak (Quercus spp.) trees. Similar to pine-pine gall rust , this disease is found on pine trees but its second host is an oak tree rather than another pine.
Amphibolips confluenta Spongy Oak Apple Gall Wasp; Amphibolips cookii Oak Apple Gall Wasp; Amphibolips nubilipennis Translucent Oak Gall Wasp; Amphibolips quercusinanis Larger Empty Oak Apple Wasp [11] Amphibolips quercusjuglans Acorn Plum Gall Wasp; Amphibolips quercusostensackenii Small Oak Apple Gall Wasp; Amphibolips quercuspomiformis Live ...
Krebs gall is caused by surface agents. Filz gall is caused by agents among surface hairs. Fold/roll gall is caused by agents within turned-over leaf blades. Pouch gall is caused by agents within a cup-like structure that occurs when opposite ends of the infected structure arch upward and form a spherical oval. Causative inside agents include:
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Trees inoculated with G. oregonense end up with spongy, soft insides. [3] It prefers dead red fir but will also accept dead or alive Douglas fir, spruce, hemlock, and pine. [ 3 ] When this reishi is found on living trees it is usually consequent to tree wounds, [ 3 ] such as bear marks.
Amphibolips quercuspomiformis, also known as the apple gall wasp or live oak apple gall wasp, is a species of gall wasp. It induces galls in coast live oak and interior live oak trees. Like many gall wasps, it has two alternating generations which induce differing galls: an all-female parthenogenic generation, and a bisexual generation.