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Mosca dell ulivo

The cycles of nature

Nature understood as the world around us is a machine that we could define as perfect, because millions of events per second take place simultaneously in it, yet everything is the result of a mechanism of life, even if it is sometimes difficult to understand; in fact, by life we ​​mean life, not death, but in nature death is a normal consequence of life and is often necessary for everything to go on. Very often it is we humans who intervene in natural processes, altering their balances and therefore compromising many of the things we have described; then it is normal that we will find ourselves in front of a nature that seems to make no sense but then in reality it is only a nature that has to run for cover after we make trouble with it.

Natural enemies


In reality, we human beings do not notice or care for natural cycles until one of their courses interferes with our lives; Leaving aside the discourse of death, just mentioned in the previous paragraph but still too complicated, a striking example of a completely natural cycle that we do not like is the one that sees some insects attack a plant we love and that we maybe cultivate with care in our garden. It is a situation that many hate and for which they take it out on nature, not understanding that it is only a way for nature to regulate and control itself, allowing various species to survive; we are not able to understand it because we put our life before nature itself, but it is not a right thing because we are part of nature and we have to obey its laws. The “hatred” towards the adversities of our plants is greatly amplified when there is a business related to them, as there are many people who work in crops and therefore it is a rather common situation. In this case there are many possibilities for fighting, but we recommend avoiding the chemical fight which only risks having serious consequences for ourselves as well.

Olive fly

The olive fly (or olive tree, as it is most often named in relation to this insect) is a species of insect whose scientific name is Bactrocera oleae; it has the appearance very similar to that of a common fly (even if there are distinctive elements and we will see them) but above all it is known above all because it infests the olive trees with their larvae, really greedy of the drupe of this plant (that is, the olive). As with most insects that infest plants, the stage of their life cycle that creates the most problems is the larval one, because in this phase the organism has the greatest need for nutrients and therefore is extremely voracious and aggressive with respect to this. that surrounds it. Since the olive fly lays its eggs in a very small hole dug on the surface of the olive, the larva will be inside the drupe and will feed voraciously on most of the internal pulp. The apposition takes place through the posterior channel similar to a sting (first difference with the fly), which pierces the surface and lays the egg. These in a few days will hatch to leave the larva, whose only thought will be to feed and grow.

Olive fly: Struggle and other characteristics

The attack of the olive fly on our plants is favored by various situations and conditions, some controllable and others less so; let’s say immediately that scientists have managed to develop oil cultivars capable of resisting, or rather, of not attracting olive flies and therefore they are immune from this invasion. Another determining condition is the climate, because the olive fly wants an average warm climate (between twenty and thirty degrees centigrade) and a decent humidity, while it cannot survive when temperatures exceed thirty degrees and at the same time there is a certain dryness of the air. The methods of fighting the olive fly are distinct, like all the others, in biological and chemical; the chemical ones are certainly effective, but as usual it is good to avoid them (if not absolutely necessary) because they are still substances that will remain in the plant and in its fruits, and this is not good for our health. Biological control can be practiced by inserting one of the natural enemies of the olive fly into the ecosystem of our plants; unfortunately it has very few of them, especially some Diptera, which are voracious towards the larvae, therefore they prevent the development of successive generations of the same species. In fact, the olive fly has a short life cycle, so it happens that from summer to full autumn there can be more generations and more attacks, with a lot of damage. Biological control can be practiced by inserting one of the natural enemies of the olive fly into the ecosystem of our plants; unfortunately it has very few of them, especially some Diptera, which are voracious towards the larvae, therefore they prevent the development of successive generations of the same species. In fact, the olive fly has a short life cycle, so it happens that from summer to full autumn there can be more generations and more attacks, with a lot of damage. Biological control can be practiced by inserting one of the natural enemies of the olive fly into the ecosystem of our plants; unfortunately it has very few of them, especially some Diptera, which are voracious towards the larvae, therefore they prevent the development of successive generations of the same species. In fact, the olive fly has a short life cycle, so it happens that from summer to full autumn there can be more generations and more attacks, with a lot of damage.

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