BIOLOGICAL CONTROL AT THE WASP OF THE GENUS CASTANEA
In Italy in recent years, after the first sighting occurred in 2002, there has been a wasp from China that has brought considerable problems to the local vegetation. This parasite, known as the wasp gall of Chestnut, Dryocosmus kuriphilus Yasumatsu, 1951, settles on the trees Chestnut. Among the species that are affected include the European chestnut, the chestnut wild, and the Euro-Japanese hybrids. The specimens of this parasite are female and they reproduce by parthenogenesis, laying up to 150 eggs each, causing conspicuous and numerous galls on the plants. The presence of galls on chestnut trees makes that not interfere with the regular metabolism of plants thus leading to an irregular growth of the same and a drastic reduction in the production of chestnuts. The chestnuts have been always, for many Italian regions, a considerable economic interest. This is due to the fact that every part is used: the fruit that has a high nutritional value, the wood for its hardness and elasticity and bark for tanning leather. To combat the invasion of this parasite, from his first sighting, have been adopted different regulatory actions including:
*Decision of the European Community of 27 June 2006 (2006/464/EC)
*Ministry Of Agriculture, Food and Forestry, decree of 30 October 2007 (OJ 42, 19.2.2008)
*And several actions at regional level
Since 2010 towards the gall of the chestnut gall wasp (Dryocosmus kuriphilus) you are promoting another type of action, biological control through the introduction of the parasitoid, the Torymus sinensis Kamijo, 1982. This species has separate sexes, females are identifiable by the presence in the abdomen with ovipositor which lay their eggs in the galls of gall; doing so Torymus sinensis larvae destroy those already established. Very important aspect is that this insect does not create any kind of environmental problem since, as a parasitoid, is hyper-specific for a given species and, in the absence of it, its role is lacking. The launches of this kind are made every year by specialized operators that introduce the species in the affected areas and thanks to these interventions in recent years we are witnessing a reduction in the population of Dryocosmus kuriphilus in different areas. Together with colleagues Federico Crovetto and Marco Maggesi (both environmentalists/naturalists graduate and professional photographers) we photographed the Drycosmus kuriphilus from larval to adult and its parasitoid, as well as the problem solver, the Torymus sinensis in both the adult forms (male and female).
With the material we have created a scientific/photographic exhibition about the problem with photos taken with high-quality equipment and everything related with the content of the texts with a scientifically researched out however accessible to all. The exhibition was developed in 10 vertical panels in forex 5mm in size 70×100 cm. This has been on display in various locations and has received, from the people who participated and by the same Park Authority host, some interest and appreciation. The material can also be used for brochure, depliant, individual panels, photographs and much more.
If you are interested write me and we could meet to expose the exhibition in more detail and show you a preview.
Are you interested to an exhibition on the subject? Please contact me
With other two colleagues (both environmentalists/naturalists graduates and professional photographers) we photographed the Dryocosmus kuriphilus from the larval stage to adult form and, moreover, the parasitoid as well as the problem solver, the Torymus sinensis (male and female forms).
With this material we created an scientific/photo exhibition with HQ pictures and texts with a scientific level content but accessible to all. The exhibition has been developed in ten vertical panels in forex by 5mm Size 70 × 100 cm.
The material can also be used for brochures, leaflets, individual panels, photographs and more…