When it comes to Daejeon, many people may think of wheat and corn in the first place. They will think that the insects on this are not treated by random drugs. The problem can be solved with three or two dollars. What kind of resistance?
In fact, rice, corn, wheat, peanuts, and soybeans can be counted as large fields. In some places, sunflowers, peppers, etc. are also used as field crops. This regionality is not stated in the future, and it is aimed at the traditional sense of Daejeon. Do some discussion.
corn
Speaking of corn. There is really no resistance pest on this, most of them are very good to fight. Basically, once the medicine is over, it can prevent and control a 7788, which is also a regional outbreak of the Northeast armyworm in 12 years and 13 years, causing no small harm, but It is no problem to control with regular products.
What I want to say here is the two-pointed moth, which is also a kind of pest that occurs regionally. It is difficult to prevent and control. It is not to say how big the resistance is, but the part that it invades is too disgusting, the conventional method of spraying and the system of internal absorption. Pesticides with poorer properties are difficult to control.
It is harmful, does not eat leaves, does not bite deep roots, only bite the part of the stem base to the ground or the shallow semi-naked roots, causing the broken seedlings.
Ordinary spray method is only for the leaves, only a small amount of liquid can fall on the soil, the base of the stem is basically sticky; the rooting is indeed a good prevention method, but in the case of sufficient rain or good sensation, rarely Some farmers will go to the ground to irrigate the roots, and even in many places there is no habit of pouring the land; in fact, the products of the conventional control of lepidopteran pests such as avermectin and carbaryl salt can still be controlled when exposed to pests. However, poor systemic absorption makes them difficult to use.
The following two methods are introduced to prevent and control different situations:
Spray, choose insecticide, fipronil, chlorantraniliprole, flubendiamide, tetrachloremamide and Other products with good internal conductivity, basically able to kill, even for underground pests such as cockroaches Can play a good control effect; granules are applied, granules such as phorate, chlorpyrifos, toxic xin, phoxim and other granules are applied to the base of the corn stem to allow the pest to die, this way also Can be used for fruit trees, sprinkle under the roots of the tree to prevent pests from climbing trees.
wheat
According to past experience, wheat pests are still relatively easy to control. After seed dressing with phorate, underground pests are basically no longer occurring, but with the ban of phorate in various places, the price of other seed dressing products is relatively high, many The peasants chose not to mix seeds, or inferior seed dressing, which caused cockroaches and golden worms to occur in some plots. It was not a fight for drugs or drugs, and the general pharmacy could not be stopped. Of course, the prevention and treatment method is still very simple. It can be mixed with a suspension seed coating agent such as imidacloprid, thiamethoxam or fipronil. It must be remembered as a “suspended seed coating agentâ€. Organic phosphorus is not recommended, and the risk of phytotoxicity is high and easy. Burn seedlings.
Also, last year, some wheat stalks in Anhui showed great resistance. Some farmers did not fight three times. This seems to represent the era of low-cost imidacloprid paste, and the use of pymetrozine. Thiamethoxam or high levels of imidacloprid have become a trend.
peanut
The most troublesome thing about peanuts is underground pests. It is very troublesome to control. In many areas, the combination of ditch and seed dressing has just been able to prevent and control. Some are still accustomed to using a single method, some are good, some are still big. .
For the application of granules before sowing, take the example of poisonous xin granules, from about four pounds at the beginning to the current seven-eight pounds and one mu of land, and even the use of fifteen or six kilograms. It is not satisfactory, it can be said that granules are difficult to improve in the prevention and control of underground pests, of course, there is no ban on phorate.
The effect of chlorpyrifos seed dressing is also not as good as before, the frequency of phytotoxicity is also very high, and now many banned chlorpyrifos seed dressing, resulting in the dying of chlorpyrifos is getting faster and faster; imidacloprid seed dressing is really good at the beginning, the avoidance of underground pests Sex is very obvious, but it is now uncontrollable.
Now the effect is better, fipronil seed dressing and clothianidin seed dressing, in which fipronil effect is very obvious, underground pests at the same time prevention and control, and there is no resistance, but there is news that fipronil dressing will be banned, The future is not very good; the cloth dressing effect of clothianidin is very good, the only thing that needs to be considered is the safety problem. It is still very desirable to make it into a low-content granule ditch.
Soy
Soybeans, whether they are above ground or underground pests, are now very resistant, and traditional chemical control is becoming more difficult.
As far as underground pests are concerned, they are mainly cockroaches. The most serious ones have seen hundreds of square meters. The use of chlorpyrifos, phoxim or mixture is completely useless. Even if the amount of phorate is small, it will not work. The farmers are very headaches. At that time, in response to this problem, I tried to let the retail store try the fipronil. The effect was very good. I was killed. Now, in addition to the routine control of underground pests, such as emulsifiable concentrates and granules, there are a few pieces of flubens. Nitrile is on standby.
The use of imidacloprid and fipronil in seed dressing is very good. The roots rarely see the bite. The clothianidamine has no information because it has no data.
The pests on the ground should be the lepidopteran larvae and the larvae. The conventionally used methadone salt can be used for the second-instar larvae and the third-instar larvae. However, when it reaches four or more years, the use of simple thymite salt can hardly be controlled. This has also created a situation, the fake Kang Kuan, commonly known as the "small branch medicine" is rampant, the amount is also greater year by year.
Based on this situation, the effect of Awei salt plus indoxacarb and tetrachloremamide is good. The use of polyester-based vitamin A salt in the early stage can also increase efficiency.
Rice
There are "three insects and two diseases" in rice, among which rice planthopper and rice leaf roller are the most difficult pests to control. Rice planthopper is a monsoon pest. It is not necessary to break out every year, but rice leaf roller Absolutely a stubborn pest.
In the prevention and control of rice planthoppers, many products that are currently not patented in China have been used, but no single agent or indicated mixture has shown very good results. Many of them are made by some manufacturers themselves, or Simply spray with phorate or granules, causing a lot of poisoning.
It is said that the two new patent products are still good. If there is no patent in China, it may be worth considering the ratio of dinotefuran, doxorubicin and nitenpyram or pymetrozine.
The difficulty in controlling rice leaf roller is that it is too difficult to control after rolling leaves. From the era of high toxicity in the past to the later era of avermectin to the later Kangkuan era, it has now entered a hundred schools of thought, or blindly arrested. era.
It has been proved by practice that avermectin + chlorantraniliprole + tetrachlorfenamide is good, there are manufacturers to do this, but it involves two patents, or it is not recommended to take risks, it is said that a single dose of tetrachlorite Amide is also good.
Finally, a recipe is not patented, and the test results are not bad, avermectin + guanidinium + indoxacarb.
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