The aphids that appeared 200 million years ago are difficult to control. Are there any pesticides that can be "cured"

According to data, aphids may have appeared as early as 280 million years ago in the early Permian, and 160 million years ago, when angiosperms appeared, the species of aphids began to grow
.
Nowadays, aphids have evolved into 10 families and more than 4,000 species.
They are one of the most destructive pests in agriculture in the world
.
Although aphids are small and extremely harmful, they damage crops including grain, cotton, oil, sesame, sugar, vegetable, tobacco, fruit medicine, and various trees.
They mainly damage the tender shoots and leaves of the crops.
They pierce the epidermis of the plants and suck their juices at the same time.
, It can also cause the injured leaves to curl, spread the virus, form soot disease, etc.
Just like diabetes, the harm of complications is far greater than the disease itself
.
There is an interesting phenomenon.
Wherever there are many aphids, there will be more ants.
Aphids absorb plant fluids and secrete a sugary honeydew.
These are the favorites of ants.
In order to obtain these heavenly delicacies, ants take the initiative.
Protecting aphids can even help aphids drive away their natural enemies.
In order to eat even if it is good or bad, being an ant to do this is an out-and-out foodie
.
However, this also provides a reference for farmers to prevent and control aphids, especially in the seasons when aphids are prone to occur, and the number of active ants in the field can determine whether aphids have occurred.
I don’t know if aphids who are good at concealment learn about this situation.
How many ants will stomped with anger? Let’s go to the main topic.
Since aphids are difficult to control (concealment, migration, resistance), such as wheat field aphids are prone to occur in the middle and lower parts, and the tender shoots of fruit trees are damaged by aphids and the leaves are rolled into a cylindrical shape.
Applying pesticides to prevent and control aphids adds great difficulty
.
As for the use of natural enemies to control aphids, nowadays, there is basically no need to count on it.
Not to mention that ants use their legs to stumble.
It is said that the current various pesticides are sprayed all over the sky.
How many natural enemies can be seen, so we adopt chemical and physical methods.
The prevention method is king
.
Physical control of aphids is not only the well-known insect net, insect lamp and sticky insect board, etc.
, because the physical control is too passive, and the prevention and control of migratory adults are mainly used, and the cost is high, it can only be grown as an economic crop District assisted control of aphids
.
So, are there any pesticides or chemical control methods that can eradicate aphids? The answer is no.
The prevention and control of aphids is not like curing diseases, which can be cured by medicine.
In addition to strong mobility, strong resistance, and strong self-protection, aphids also have strong reproductive ability, and the reproductive algebra overlaps.
In other words, it is possible to reproduce several generations on the same crop in one day.
This extremely short time can cause infinite shortage of offspring and grandchildren.
In addition, female aphids can reproduce after birth, especially in spring.
In summer, female aphids are almost in the world, so this forms the reason why aphids always like to break out in spring
.
Under this premise, the best way to control aphids is to prevent them in advance
.
Such as wheat aphids, by dressing seeds with imidacloprid and thiamethoxam suspension seed coating agents, it can effectively prevent aphids in the growth period.
This method can also be used for various transplanted crops (such as sweet potatoes, peppers, chrysanthemums, etc.
) Chinese medicinal materials and melons, fruits, trees, etc.
) dipped in roots, or dressing seeds of tuber crops
.
In addition to the mode of dressing seeds and dipping roots, there are also granules such as imidacloprid, thiamethoxam, dinotefuran, clothianidin, and compound granules such as difenidin, which are applied in field and furrow.
, Acupoint application, etc.
, can also play a superior effect in preventing aphids damage
.
For the prevention and control of the peach aphid that everyone is more concerned about, it is recommended that fruit growers clear the orchard (to kill the overwintering eggs) and before the occurrence of the peach aphid (the peach blossom red period and the 80% declining flower stage) , Spray nicotine aphidicides (imidacloprid, thiamethoxam, etc.
) in combination with abamectin.
After the peach tree has buds and leaves, you can add ovocide, such as spirotetramat (strong systemic killing Aphid ovocide, but without leaves, it has lost its due power)
.
As long as the three steps (steps) of prevention are done, the green peach aphid in the orchard will basically not be difficult to control.
The reason why many orchard aphids is difficult to control is because the early prevention is neglected.
Thus, they fall into the dilemma of difficult prevention and control
.
It can be seen that the best pesticides for eradicating aphids do not exist, and the best application techniques are the key to preventing aphids.
As long as the key measures are taken to prevent aphids in advance, the serious consequences of crop aphids outbreaks will have nothing to do with you
.