The degree of intervention needs to be modulated to match the frequentation of the areas concerned: methods designed to eradicate the caterpillars in busy areas and to keep them under control in other places. The empty cocoons of oak procession moths hang on an oak tree in Schenkenberg, Germany, 15 June 2012. Means of contamination comprise direct contact with the nest or t… Oak processionary caterpillar season has begun UBA recommends making the least possible use of pesticides. As such, people would normally only come into contact with them if they are working on oak trees, cutting them down or managing branches. The researchers emphasize that the use of natural enemies ensures that the oak processionary caterpillar population remains manageable, but that the natural enemies cannot control the caterpillar. The measures taken led for the third year in a row to a decrease in the number of oak processionary caterpillar nests at the trial location. However, there are certain plant protection products available for combating these caterpillars for plant health purposes that can be applied from the ground. Oak processionary caterpillars on a tree, and feeding damage. These common, everyday products include household disinfectants, insecticides and other products whose purpose is to eliminate, destroy or deter harmful organisms (moulds, bacteria, viruses). It lays its eggs in summer, generally fairly high up in most species of pine trees and although there is evidence that in some cases types of fir are used, all other conifers are avoided. PPM, like its close relative the oak processionary moth (OPM), gets its name from its distinctive habit of moving about in nose-to-tail processions. Toxic processionary caterpillars in France already. Processionary caterpillars are insects, found in several regions of France, including urban areas, whose proliferation compromises the health of the trees on which they feed. Where trees are already in place, measures should be taken in summer to detect whether pine processionaries are present with the use of pheromone traps (traps using chemical substance comparable to hormones, which attract insects). Current knowledge of the biology and epidemiology of the oak processionary caterpillar seems too fragmentary to allow any recommendations for its control. Formerly listed on the Mediterranean rim, caterpillars are now found in Normandy and in all regions of the North. Oak processionary moth. They pose a severe risk to both trees, humans and animals, so understanding how to recognise an infestation is vital for your health and safety. The caterpillars (larvae) develop tiny, irritating hairs from their third (L3) growth stage onwards to pupation. The researchers have been experimenting for four years with the use of natural enemies of the processionary caterpillar in Wapserveen. The forest floor and the edges of pine woods should not be left bare but covered with dense vegetation (shrubs). Gottschling and Meyer 7 reported caterpillar dermatitis in a group of 90 persons who visited a recreational area at the border between Germany and France where oaks infested with the oak processionary caterpillar were found. One line can include hundreds of caterpillars. There are two types of Processionary Caterpillar (Chenilles Processionnaires) in France the Pine Processionary and the Oak Processionary. Professional. It exists two kinds of processionary caterpillars, those that colonizepine trees (second choice fir) and those which colonize Oak trees. Researchers at the Oak Processional Caterpillars Knowledge Center have discovered that oak processionary caterpillars can sit in nests underground for ten months, only to suddenly crawl out en masse in June. This 35-40mm butterfly is gray with black patterns and whitish spots. An average of 1.7 litters per tree was counted in the 64 trees at the test location. At Nicholsons, biosecurity and the health of our staff and clients remain the utmost priority. Oak Processionary Moth Thaumetopoea processionea (Notodontoidea Thaumetopoeidae) The oak processionary moth is a major defoliator of oak in Europe. The caterpillars are found in different regions: the pine processionary is mostly found around the Mediterranean Basin and the Atlantic seaboard as far as the Pyrénées-Atlantiques département, while the oak processionary is commonest in the Alsace, Bourgogne, Ile-de-France, Centre, Poitou-Charentes and Midi-Pyrénées Regions. As a general rule these caterpillars present a greatly reduced risk compared to the Pine Processionary as they rarely go to the ground. The active substance present in the biocidal product can be a chemical compound or derived from a micro-organism that exerts its biocidal action on or against harmful organisms. require the eradication of processionary populations, and a case in which the presence of low caterpillar population levels might be acceptable and understood by local residents (roadside trees, large urban public parks, etc.). The oak processionary caterpillar is originally a southern European species but has been spreading northwards due to climate change. The common and scientific names of this moth refer to the behaviour of the larvae to form long processions. I saw with my own eyes the oak trees of Richmond Park infested with the caterpillars of the oak processionary moth (OPM) Thaumetopoea processionea. The caterpillars are larvae of night-flying moths that lay eggs in clusters of 250 or more. insect larva larval stage characteristic of the small insect family Thaumetopoeidae (order Lepidoptera), sometimes classified as part of the prominent moth family (Notodontidae). REMOVE THE TREES. The association of these two alternative trapping techniques, the adults in summer and the caterpillars in winter and spring, should provide an adequate response to this requirement for zero tolerance when the instructions for installation are properly observed and levels of infestation are non-epidemic. Researchers have established that the use of birds and insects in the Drenthe village of Wapserveen has led to a decrease in the number of oak processionary caterpillars. If there are too many nests in one tree it could be stripped bare of foliage and die. Natural enemies help to control the nuisance of the oak processionary caterpillar. The poisonous bristles of these annoying little critters called oak processionary caterpillars cause a lot of discomfort to both humans and animals. A considerable research effort must therefore be undertaken to establish a scientific and technical basis on which to develop alternative and integrated methods for managing the risk associated with the oak processionary. In areas with high levels of infestation, insecticide treatments may be applied from the ground. T. processionea, commonly known as the oak processionary moth, is a major pest in many European countries and threatens the health of oak trees. The Agency recommends favouring preventive methods, but these can be of limited efficacy. The caterpillars and larvae of Oak Processionary Moth (OPM) are pests that infect oak trees in the UK. ... Oak processionary moth. The oak processionary (Thaumetopoea processionea) is a moth whose caterpillars can be found in oak forests, where they feed on oak leaves, causing significant damage.They travel in nose-to-tail processions (hence their name), often arrow-headed, with a leader followed by rows of several caterpillars abreast. 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