Oak gall wasp uk. British Plant Gall Society Galls caused by wasps - Cynipidae Nearly all wasp ...
Oak gall wasp uk. British Plant Gall Society Galls caused by wasps - Cynipidae Nearly all wasp galls in the UK are caused by wasps in the family Cynipidae, and most are on Oak, with a few on Rose and a few on other herbaceous species. They are all types of abnormal growth, but their appearance can vary widely. There are four types of spangle gall in the UK, caused by four different gall wasps. Oak marble galls are caused by another gall wasp, this time Andricus kollari. Apparently it's caused by a type of wasp laying it eggs. There are dozens, possibly hundreds, of different sorts of galls on oak trees. Oak apple gall. Sep 13, 2018 路 This wasp, which first appeared here in the middle of the 20 Century, is one of a closely related group which all cause galls to grow on oaks. (A gall provides the insect with food and shelter, and is the oak’s reaction to its presence. It鈥檚 found mostly on pendunculate oaks in England and Wales. It's called a Gall Wasp , because of the galls it creates 馃 Everyday is a school day ! 馃悵 RF2AA0TRX–UK Two oak galls from a gall wasp infection on an oak tree with brown leaves. Galls forming on leaves include those of Harmandia globuli midges on aspen leaves and the sputnik galls of the Diplolepis nervosa wasp, found on wild roses. The knopper gall is a relatively new arrival in the UK as the wasp only arrived in the 1950s. This is one of our most well-known galls. Sep 25, 2025 路 In this guide, however, we’re focusing on oak galls - most of which are created by tiny cynipid wasps. [5] Females lay eggs in various plant tissues from which the growth of the gall structure is induced. Aug 28, 2025 路 In the UK, about 70 different gall wasps interact with oak, for example, creating an entire curiosity cabinet of galls with evocative names, such as the artichoke, the marble and the silk button. Aulacidea, Phanacis, Liposthenes), to more complex Diplolepis, which gall roses, to the Oak gall wasps Galls usually have a lower 'RAG' rating then the causer. They form the second, summer generation and will go on to lay eggs on native Oak trees, creating more weird and wonderful Knopper Gall sculptures. Oak spangle gall. Oak knopper gall. ) These wasps have complex life-cycles involving a second generation which causes minute galls on Turkey oaks. The wasp was intentionally introduced from the Mediterranean in the 1800s because its galls have a high tannin content, which was useful for tanning leather and dyeing cloth. Galls caused by wasps - Cynipidae Nearly all wasp galls in the UK are caused by wasps in the family Cynipidae, and most are on Oak, with a few on Rose and a few on other herbaceous species. Click on the species to find out more. Oak marble gall. Larvae feed on the nutritive tissues of these galls before pupating and emerging from the galls as adults. Often no more than 5mm long, these wasps are so small and similar in appearance that identifying them in the field is extremely difficult. Gall wasp larvae typically develop as either gall inducers or as inquilines of other gall wasps, as is the case in the genus Synergus. Nov 30, 2025 路 If you see a mature, brown marble gall hanging from an oak tree, the chances are you’ll see the tiny holes made by exiting wasps tunnelling out, ready to start their own lives as adults – looking for an oak leaf to lay their eggs on. . UK Map Species data profile ? Species profile Common names Marble Gall Species group: Bees, Wasps, Ants Kingdom: Animalia Order: Hymenoptera Family: Cynipidae Records on NatureSpot: 265 First record: 24/05/2006 (Calow, Graham) Last record: 07/01/2026 (Nicholls, David) Aug 10, 2020 路 These develop inside a second type of gall, from which both male and female wasps will emerge. Understand oak gall wasps, their effect on trees, and whether control is necessary. g. These galls can be found between May and June where the female has laid her eggs in the leaf bud. Life-cycles increase in complexity from the galls on Bramble (Diastrophus) and herbaceous species (e. Irregular Spindle Gall Wasp from Santa Catalina Island, Avalon, CA, US on July 17, 2022 at 06:36 AM by Chalon Boesel. Strange looking growths on your oak tree? Wondering what’s caused them and what to do about them? These growths are probably caused by the oak gall wasp. The marble gall is found on pendunculate oaks. Southern Live Oak Stem Gall Wasp from Highlands County, FL, USA on March 22, 2026 at 03:23 PM by LW Ridge I noticed these yesterday on the oak trees. Sep 21, 2025 路 These strange growths are not fruits, fungi or diseases, but galls – and behind each gall lies the remarkable life of a very tiny insect: the oak gall wasp. The oak apple gall wasp, Biorhiza pallida, is a tiny wasp that causes growths, or 'galls', on oak twigs. Unless you鈥檙e really interested in galls, it鈥檚 fine to just call what you鈥檝e found a spangle gall and leave it at that. It occurs on both our native oak species, as well as other oak species, and can be found across the UK. Sep 7, 2020 路 Galls appear on more than half of all plant families, and can appear on leaves, twigs, roots or flowers, fruits or seeds. pybafhgzwpjqjfkkfsqtcbeuyobyqygjqjztovelewrxp