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Atrusca brevipennata, formerly Andricus pellucidus, also known as the little oak-apple gall wasp, is a locally common species of cynipid wasp that produces galls on oak trees in North America. [1] The wasp oviposits on shrub live oak and Gambel oak leaves. [1] The larval chamber is at the center of the gall, connected to the husk by slender ...
Andricus grossulariae is a gall wasp species inducing agamic acorn cup galls on oak tree acorn cups and sexual phase galls on catkins. [1] Synonyms include Andricus fructuum (Trotter, 1899), Andricus gemellus (Belizin & Maisuradze, 1961), Andricus intermedius (Tavares, 1922), Andricus mayri (Wachtl, 1879) and Cynips panteli (Kieffer, 1897).
Galls (upper left and right) formed on acorns on the branch of a pedunculate (or English) oak tree by the parthenogenetic generation Andricus quercuscalicis.. The large 2 cm gall growth appears as a mass of green to yellowish-green, ridged, and at first sticky plant tissue on the bud of the oak, that breaks out as the gall between the cup and the acorn.
Jumping oak galls are caused by a very tiny, native, stingless wasp (Neuroterus sp.) which lays eggs in leaf buds. As the leaf develops, pinhead-sized galls, also referred to as abnormal plant ...
Besbicus mirabilis, formerly Cynips mirabilis, also known as the speckled gall wasp, is a common species of cynipid wasp that produces galls on oak trees in North America. [1] This wasp oviposits on the midrib of the underside (with rare dorsal-side exceptions) of Oregon oak leaves. [1] One to three detachable galls per leaf have been observed. [1]
The all-female generation's galls appear in late spring. These round, 1 mm across galls occur on the underside of leaves, and eventually detach and fall into the leaf litter. Adults emerge early the following spring and lay eggs for the bisexual generation. This generation induces galls that are integral to the leaf. [2] [1] Adult wasps are .75 ...
Andricus quercuscalifornicus (occasionally Andricus californicus), or the California gall wasp, is a small wasp species that induces oak apple galls on white oaks, primarily the valley oak (Quercus lobata) but also other species such as Quercus berberidifolia.
An oak apple on a tree in Worcestershire, England. An oak apple or oak gall is a large, round, vaguely apple-like gall commonly found on many species of oak. Oak apples range in size from 2 to 4 centimetres (1 to 2 in) in diameter and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae. [1]
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