Tips

Oziorrinco

Insects in the garden

Nowadays too many people still believe that their garden is exclusively the place where they like to relax, do small gardening jobs and maybe organize some party; obviously these are some of the best activities that can be practiced in our garden, but we must realize that it is not only this: our garden is a real ecosystem, and to treat it as it is required and as it deserves to be done, we must begin to consider it as such, because it is also thanks to the insects that populate it and the bacteria that live in the soil that our plants are able to live. Among the many components of a small but very complex ecosystem such as the garden, insects play a decisive role: the first order of living beings in the world in terms of number of individuals and number of species (they have a large advantage over animals and even plants) has a long line of qualities, some positive and others negative (for us human beings), but all forming part of the natural “design” of events; after all, our planet has survived for millions of years, everything that happens naturally is therefore part of this very long and very important history, of which we human beings are only a part.

The oziorrinco


There are many insects that “help” us with gardening and in many other things, but in this article we will devote ourselves to the study of one of the “bad guys”: the oziorrinco. This species of curculionid beetle has a body length of about one centimeter and a maximum of two (it depends on the species, there are about a thousand and more or less half are also present on the Italian territory), characterized by a small and pointed head, a equally small and hemispherical thorax and a large, ovalized abdomen with hard armor, which may have light spots or greenish scales while the basic color of the insect is brown or intense black. The noteworthy anatomical feature of the oziorrinco is the chewing apparatus, so strong and voracious that it disturbs the growth and development of our plants, as it feeds on the leaves and especially the new leaves (thus preventing the new growth of the plant); it acts at night, coming out of its lair in the ground in the first dark of twilight and returning to it at the first light of dawn. It is only in these moments that we can see it, and it will also be easy because it does not fly and has rather slow and staid movements.

Life cycle and goals

Surely an attentive reader will have thought of how strange and rare is the case of an insect that presents as a dangerous phase the adult and mature one; in fact it is so, the oziorrinco is dangerous in the adult phase, as it almost never happens among insects. But this does not mean that the larvae are not equally so: while the adult comes out of the ground at night to feed on the leaves, the larva remains constantly in the ground, feeding on the plant but from below, or attacking its roots, tubers and other elements underground and causing the plant to die because it prevents it from replenishing itself with nutrients. In short, the attack of the oziorrinco is bilateral and for this reason it is very dangerous; its attack usually begins in the month of May, when the first adult specimens born from the winter larvae begin to emerge from the ground: they begin to feed on the leaves and at the same time the females “sow” eggs everywhere, from which the larvae will be born around September-October and will pass through three stages during the winter and they will give birth to new adults again in May. In general, the goals of the oziorrinchi are a large number of plants, among which they love tuber plants (potatoes, carrots) and citrus fruits, as well as the olive tree.

Oziorrinco: Chemical and biological fight

The olive tree is the most economically important target of the oziorrinco, the one for which this insect is known and for which research is being carried out to fight it. From the point of view of the adult, biological products have no effect because they generally operate by contact and its resistant armor protects it from everything, while chemicals are often very toxic and are therefore not recommended. To stop it from “climbing” the new leaves of the olive tree are sold nets (in glass wool or similar material) to be spread horizontally halfway up the trunk, so as to constitute an impassable barrier for a small insect without methods to fly. The most effective fight is the preventive-biological one: the natural enemies of the oziorrinchi, or rather of their larvae, are the larvae of the nematodes; they are sold in the form of powder, to be mixed with water and to be used in September to water the plants we want to protect. These nematode larvae are parasites of the larvae of the oziorrinchi, that is, they penetrate inside and destroy them, moreover reproducing and then going in search of all the other larvae they find of this insect; another positive thing is that these larvae do not disturb man or his crops in any way, so they are very safe. moreover by reproducing and then going in search of all the other larvae they find of this insect; another positive thing is that these larvae do not disturb man or his crops in any way, so they are very safe. moreover by reproducing and then going in search of all the other larvae they find of this insect; another positive thing is that these larvae do not disturb man or his crops in any way, so they are very safe.

Related posts

Deja una respuesta

Tu dirección de correo electrónico no será publicada. Los campos obligatorios están marcados con *

Botón volver arriba