The economic importance of beetles reflects the extent and nature of their impact on human economic activities, particularly in agriculture, forestry and product storage. This importance can be negative (damage), positive (ecosystem services) or negligible and is always conditioned by ecological, spatial and temporal factors. The assessment of economic importance must always be contextual. For example, a carpenter beetle in a forest is a useful decomposer, whereas in the truss of a historic building it is a critical pest. The modern view also seeks to quantify previously neglected benefits, such as increasing soil fertility, which are crucial to the global economy.
The economic importance of beetles has traditionally been divided into three categories:
- Positive (Beneficial beetles): they contribute to value creation (pollination, plant protection, biomass decomposition).
- Negative (Pests): They cause direct losses to property, food or raw materials.
- Neutral (Indifferent): Species whose impact from a human perspective is negligible or not yet proven.
Positive economic importance
Species that provide direct or indirect benefits.
1. Predators and regulators of pests:
- natural biological control of crops.
Examples:
- Coccinellidae sp.,
- Carabidae sp.
2. Decomposers and "ecosystem engineers":
- decomposition of organic matter,
- soil improvement,
- nutrient cycling.
Examples:
- Scarabaeidae sp.,
- Silphidae sp.
3. Indicator and conservation importance:
- indicators of environmental quality,
- 'Umbrella' or 'flagship' species.
Examples:
- Osmoderma barnabita,
- Cucujus cinnaberinus.
Negative economic importance
Species that cause measurable economic losses.
1. Agricultural pests:
- damage crops (larvae, adults),
- reduce yield or quality of production.
Examples:
- Leptinotarsa decemlineata,
- Phyllopertha horticola - a pest that damages lawns and cereal crops.
2. Forest pests:
- weaken or kill woody plants,
- deteriorate timber quality.
Examples:
- Ips typographus,
- Agrilus planipennis
3. Storage pests:
- invade stored products (grain, flour, feed).
Examples:
- Sitophilus granarius,
- Tribolium castaneum.
Neutral or negligible importance
1. Most Coleoptera species:
- no demonstrable impact on the economy.
The fact that a species is not economically important does not mean that it is 'insignificant' biologically.
Classification table of economic importance of beetles (Coleoptera)
| Category of economic importance | Nature of impact on humans | Typical environment or sector | Note on assessment | Examples of taxa |
| Negative - agricultural | Damage to cultivated plants (leaves, roots, fruits) | Agriculture, horticulture | Often seasonal, dependent on population density | Leptinotarsa decemlineata, Phyllopertha horticola, Agriotes spp. |
| Negative - forestry | Damage to woody plants, reduction in timber quality | Forestry | Mainly important in calamities | Ips typographus, Pityogenes chalcographus, Agrilus viridis |
| Negative - stock | Infestation of stored products | Warehouses, food processing | Impact measurable economically | Sitophilus granarius, Tribolium castaneum, Stegobium paniceum |
| Negative - hygiene | Food contamination, passive transmission of pathogens | Human settlements | Rather indirect economic impact | Dermestes spp.., Attagenus spp. |
| Positive - regulatory | Predation and control of pest populations | Agriculture, forestry | Importance often underestimated | Coccinellidae spp.., Carabidae spp. |
| Positive - decomposing | Decomposition of organic matter, nutrient cycling | Soil, forest ecosystems | Indirect, long-term benefits | Scarabaeidae spp.., Silphidae spp. |
| Positive - soil-forming | Improvement of soil structure | Agroecosystems | Importance in sustainable management | Geotrupidae spp. |
| Positive - indicative | Signalling environmental quality | Nature conservation | Non-economic but strategic importance | Osmoderma barnabita, Cucujus cinnaberinus |
| Neutral / negligible | No demonstrable impact | Natural ecosystems | Most abundant group | most Coleoptera species |
| Potential / contingent | Significance only occurs under certain conditions | Different environments | Depends on climate and management | Ips typographus, Oxythyrea funesta |