Among the many unwelcome guests who can cause damage to our garden or green area, we can also meet the beetle insect that likes to eat the leaves and flowers of our flower beds.
The common insect beetle, whose scientific name is Scarabaeidae Latreille, belongs to the large family of beetles, which has more than twenty thousand different species. In Europe and Italy there are more than three hundred species commonly found belonging to this large family.
Beetles are distinguished by their non-geniculated laminated antennas, which they cannot roll.
The antennas of these insects consist of a rope and club of 3-7 movable and lamellar articles, in many varieties the lamellae can also be very long in which case called flabellate.
These antennae kept enclosed during their period of anactivity, give to the scarabeids a very acute sense of smell.
The scarabeids have a relatively robust and strong body, and their dimensions vary from a few millimetres to more than 15 centimeters. For example, the Beetle Hercules, one of the largest beetles known, has a length that can exceed 15 centimeters.
Some varieties are instead characterized by horns, very developed and prominent, present both on the head and sometimes even on the chest, used mainly to fight with other beetles both to defend the territory and for the conquest of the females.
The tibias of some species are often equipped with small teeth or sometimes with a single apical spur. The body is generally divided into three equal parts, even if some species have smaller or non-existent front parts.
The abdomen of the scarabeids is often equipped with a thicker cover to constitute a sort of armor often not covered by the wings.
Among the scarabeids there are many species that have a high sexual dimorphism, with a high difference then between individuals of opposite sex belonging to the same species, often manifested by horns on the head or chest, or by the size of the antennas or even the size and shape of the limbs.
The Larvae of the Beetles
The larvae of these insects have a soft body of whitish or curved yellow colour with a classical shape of C, often unlike the adults, they represent the real problem, nourishing of the radical part of the plants.
They live the first part of their evolutionary cycle underground, sheltered from the sun, and therefore difficult to identify.
Besides being very voracious, the larvae of some beetles have a very long larval evolutionary stage which can exceed even the three years, therefore they can represent a real problem as we will have them as hungry guests for all this time.
Dangerous Insect Beetle? Or Useful for our Plants?
It is harmless to humans, and often many species of this insect have nocturnal habits, so hardly visible.
Beetles or beetles belong to the largest order in the insect class, the beetles. However, not all the species of this huge family are harmful; on the contrary, there are many that are useful because they are predators or antagonistic species to other parasites.
The beetle insect considered sacred by the ancient Egyptians, able to orient itself with the stars, can however belong to a parasitic species and therefore be harmful to our flowerbeds or ornamental plants.
Some of these species feed on leaves and flowers and others especially the larvae can destroy and cause much damage, feeding on roots, to our crop or garden.
Particular species of these insects as well as attacking our gardens, plants or crops, can also infest houses and apartments and thus become a real problem in cases of serious infestation.
What Are The Most Harmful Beetles For Our Plants Or Crops?
Let’s see which are some of the most common and widespread beetles that can cause damage to our garden or flowerbed, and irreparably compromise our corner of relaxation.