Why is there a saying that fruits with bugs are sweeter?

This question needs to first determine the object of comparison, who will compare the fruit of the worm with? The same is an apple, and the sweetness is different between different varieties; The sweetness of apples on different trees will also be different for the same variety; It is the same tree, the apples that bear in different positions, due to the restrictions of light and other conditions, the sweetness is also different.

However, in general, it is an empirical problem that the fruit of the insects does be sweeter than the other individuals on the same plant. But what causes this phenomenon? The larvae of many insects will burrow into fruits, such as various heartworms (moths), and the larvae of some flies, bees, beetles and other insects will burrow into fruits to feed and grow to complete their own development.

There is a hypothesis that the adults of these insects will choose more mature fruits when laying eggs, because the more mature fruits will emit a stronger odor signal to attract adults to lay eggs on them, but this hypothesis does not hold true for the vast majority of heart-eating insects.

Adult heartworms often lay eggs when the fruit is not ripe, when the fruit is just taking shape, or even on the flower, and its larvae hatch into the fruit or into the ovary under the flower, and grow and develop with the fruit. The larvae not only feed on the pulp in the fruit, but also complete a series of complex physiological activities such as respiration and excretion. In the process of ripening fruits, organic acids are gradually transformed into various sugars that form a sweet taste, and these sugars are partially converted into alcohols through fermentation, and alcohols meet organic acids, which will generate many aromatic esters, such as ethyl acetate, ethyl isovalerate, ethyl benzoate, etc., which is the reason for the sweetness of ripe fruits.

The gases and excretions produced by the larvae during physiological activities in the fruit may just contribute to the occurrence of some oxidation reactions, resulting in more organic acids being converted into mellow lipids, making the fruit of the insects sweeter than the fruit without insects next to it.

Because, fruits with bugs are basically fully ripe fruits. Ripe fruits***, fruits are also high in sugar, so insects will also choose some fruits with high sugar content to lay eggs and reproduce. The bugs that attack the fruit are fruit flies.

Because insects generally pick sweeter fruits to incubate their eggs.

Bugs will also choose some fruits with high sugar content to lay eggs and reproduce. The bugs that attack the fruit are fruit flies.

Bugs have their unique sense of touch and perception, and they certainly choose the best fruits to eat.

Insects have their unique sense of touch and perception, and such fruits are not edible.

Because bugs also prefer sweet fruits.

Fruits with bugs are basically fully ripe fruits.

But such a fruit is not edible.

To what kind of fruit is good to ripen?

Bugs also prefer sweets.

This is actually because we don't look carefully enough, because the worm can't grow out of the fruit on its own. If there are bugs in the fruit, they must be produced by the bugs burrowing into the fruit. Once the bug burrows, a hole is left in the fruit, but the hole may or may not be obvious or even visible.

When the bug burrows into the fruit, the hole is small, and as the fruit grows, this small hole will be slowly filled and even disappear.

There are insects in the fruit, which is nothing more than two situations: 1. The insect gets into it by itself, and 2. The mother of the insect gives birth to it. For the latter, many insects have this habit.

Their adult females generally have sharp ovipositors, and they prick the fruit and lay eggs inside the fruit, and the larvae that hatch will feed on the fruit. The spawning holes are usually small, so they are difficult to detect. If the bug gets into it on its own, the hole it drills can be small or large, and it is generally difficult to spot.

Because the fruit grows on the fruit tree, in fact, all the insects on the fruit are carried by the fruit tree itself. Next, I will tell you why there are insects in fruits, it turns out that the fruit trees themselves carry them, and they should be done specifically. In order to reduce the surface temperature in summer, fruit growers in many areas will plant some weeds under the fruit trees.

We all know that where there is grass, there are bugs, so when we plant weeds to reduce the surface temperature, we will produce a lot of bugs. But we can't, knowing that there are bugs, we can do whatever they want. In many places, fruit farmers will carry out insect extermination on fruit trees in winter, in order to be able to eliminate more insects.

Before the fruit is formed, the insect lays eggs in the stamens, and then the eggs are wrapped in the ovary, and the eggs do not hatch during the process of fruit formation, and when the fruit is ripe, the eggs are also hatched, and the larvae can feast on the seemingly intact fruit without being detected by the birds.

When the fruit tree blooms, there are insects to ovulate in the flower buds, and when the flowers are broken, the eggs are encapsulated in the fruit (pit), and the eggs are hatched.

After the adult worm is in the fruit, this process is from the inside out.

That is when the fruit is small, the worm seeds are produced on it, and the worm seeds are good on the outside when the fruit grows up, and the bugs are already inside.

The worms that fruit produce are fruit flies.

Fruit flies are widely found in temperate and tropical climate zones around the world, because their staple food is yeast, and rotten fruits are easy to breed yeast, as long as many red-eyed flies are found on the side of the garbage can or on the fruit that has been stored for a long time, it is a fruit fly; Drosophila larvae are accustomed to breeding on garbage heaps or rotting fruits. Therefore, fruits that are not in the refrigerator are particularly attractive to fruit flies.

In addition to the Arctic and Antarctica, at least 1,000 fruit fly species have been discovered, and the black-bellied fruit fly produced in South China provinces mostly occurs in fermentation places such as fruit and melon stalls, kitchens and warehouses.

The 1 complete life cycle of Drosophila is divided into 4 distinct periods, i.e., egg, larvae, pupa and adults. The eggs are about 05 mm, white, with a filament extending from the back of the front end, which can attach to the food or the wall of the bottle, so as not to get deep in the food.

The eggs hatch into larvae after 22 - 24 h, and the larvae molt twice to become third instar larvae, about 4 - 5 mm;

To the naked eye, it is visible that one end of the head is slightly pointed, and there is a black hook-like mouthpart on it. The larvae live for about 4 days and pupate, at first the color is pale yellow and soft, and then gradually hardens into dark brown, and is about to emerge at this time. Adult flies can mate 8 h after eclosion, and can lay eggs after 2 days, and adult flies generally survive for 37 days at 25.

There is no such statement, right? The insects eat up the nutrients and sugar of the fruit, so that they can grow.

Not all fruits are like this.

After consulting with experts in the province's fruit trees, the reporter learned that this kind of fruit tree insect of the wheat moth family has lived outside the bayberry kernel for a long time, "there is no harm to the human body", but from the perspective of hygiene, it is best for consumers to soak in salt water before eating.

In yesterday's **, many readers thought that this bug was a fruit fly, which was denied by experts. Dr. Liu Bo of the Biological Center of the Provincial Academy of Agricultural Sciences said that fruit flies can also harm fruits, but the symptoms are completely different, and bayberry with fruit flies generally rots on the surface. And this kind of bayberry, which looks fresh and intact, has a lot of small insects, which is actually a lepidopteran insect of the wheat moth family.

Liu Bo explained that because the nutrients of bayberry are very high and there is no outer skin, it is particularly easy to attract all kinds of insects, and this kind of insect of the wheat moth family grows outside the core of bayberry when the bayberry is not ripe, so people can't see it with the naked eye, and they can't soak it with water, so they can only use salt water to force the insects out.

After the bayberry is picked from the tree, the fruit begins to die, and the reproduction rate of the insect is accelerated, so sometimes one can see that there are always some small insects flying above a pile of bayberry, and this is what this lepidopteran insect looks like after it is feathered.

It is normal to have this bug in bayberry, because bayberry does not have a peel, and when it is ripe, the sweetness and fruitiness will attract many bugs. In yesterday's interview with reporters, many experts said that this fruit tree insect is not very harmful, and there is no clinical proof that it is toxic, and people can eat it with confidence.

The Provincial Department of Agriculture Planting Administration of the fruit tree family reminded that after the public buy fresh bayberry home, they should be soaked in a higher concentration of salt water as soon as possible, rather than placed in the refrigerator first, because low temperature will cause the insects to die, and the dead insects can not be soaked in salt water.