introduction
| Monochamus | ||
|---|---|---|
 | ||
| classification | ||
| Govern | Animalia | |
| branch | Arthropods | |
| Sub Emb. | Hexapoda | |
| Class | insects | |
| Subclass | Pterygota | |
| Infra class | Neoptera | |
| Superordination | Endopterygota | |
| command | Coleoptera | |
| Great family | Chrysomeloidea | |
| Family | Cerambycidae | |
| Subfamily | Lamiinae | |
| tribe | Lamiini | |
| Gender | ||
| Monochamus Dejean, 1821 | ||
Species found in France
- Monochamus galloprovincialis (Olivier, 1795), with two subspecies;
- Monochamus galloprovincialis galloprovincialis (Olivier, 1795)
- Monochamus galloprovincialis pistor (Germar, 1818)
- Monochamus Sartor (Fabricius, 1787)
- Monochamus sutor (Linnaeus, 1758)
Risks of distribution and damage
At least in North America, this genus includes species (e.g. Monochamus scutellatus in Canada and the USA) that can cause damage to sick, injured or aging trees. Although the outbreaks for this type of insects (insects (Insecta) are part of the subgroup of hexapods, which itself is included in…) are strongly limited by cannibalism, which increases with density (density or relative density of a body is that Ratio of its density to the…) of the larvae (detected in certain species, possible in others. (As soon as two galleries connect, or if several eggs are laid in the same place, one larva eats the other)
There is a risk of outbreaks at storage areas for round wood or large coniferous logs (post-storm stands, sawmills, mine wood, etc.). These can be effectively protected; without pesticides,
- by debarking tree trunks;
- by immersion or continuous watering (but with waste and possible water contamination) or
- by covering the trunks with non-woven fabric (from June to September) or
- Using the wood before the two years required for pupation and adult emergence.
- Be careful to protect the predators of this species (In life sciences, the species (from Latin “species”, “type”…) including woodpeckers, certain parasitic flies (Eutheresia) and Ichneumonidae (these are boring hymenopteran insects that with which are related) protected Braconidae, to…) (e.g. Rhyssa lineolata and Rhyssa persuasoria, which are capable of wood-boring larvae in the bark (The bark is the outer covering of the trunk, branches and roots of trees, etc.) or the surface wood and lay their eggs there (up to 3 cm deep).
In cannibalism, natural parasitism is estimated to destroy around 70% of the larvae, while other insectivorous predators are still able to prey on the adults.
Insecticides are occasionally used (including benzene-based), but they are toxic and are not recommended due to certain requirements of ecological forest management (a forest or a forest massif is a relatively dense forest area,…) or the wood sector (e.g. forest). even be banned. : FSC).
Catch : It is useful for indicative monitoring of populations but requires appropriate traps. Storing logs in very compact piles under trees in a very shaded area (A shadow is a dark area created by the interposition of an opaque object (or just…)) reduces attacks by at least 85%. This is due to the fact that the species seeks sunny places, even if at least 85% of the eggs are laid there. Protection from direct sun. All of these methods can add up.
Other kinds
- Monochamus alternatus
- Monochamus impluviatus Motschulsky 1859
- Monochamus masaoi
- Monochamus saltuarius (Gebler 1830)
- Monochamus scutellatus (Say, 1824)
- Monochamus scutellatus oregonensis LeConte, 1873
- Monochamus scutellatus scutellatus (Say, 1824)
- Monochamus urussovi