Herbicides in the agricultural planting at the same time to bring convenience, but also let the growers have a dependence, so that into a certain herbicide prevention effect is not good, will increase the vicious circle of medication, resulting in weeds to produce resistance, even if it is a sterile herbicide, they are helpless, such as the current small flying puff, glyphosate has been resistant to glyphosate, when glyphosate sprayed, it is equivalent to a bath for small flying, and the use of phosphine glufosinate for prevention and control, can achieve the desired effect.
The following is the author's stubborn resistant weeds produced in agricultural cultivation in the past 10 years, which are well known to everyone and are also the weeds that agricultural growers urgently need to find effective eradication methods, a total of 10 species:
1. Thistle
Thistle is also known as prickly vegetables, grass as its name, absolutely belongs to the thorn head in the weeds, because the root system is deeper, artificial weeding is difficult to remove the root, so some of the more absorbent, and can remove the root of the herbicide is more popular, such as exterminating herbicide glyphosate, however, in recent years, farmers friends found that in the use of herbicides to eradicate the thistle at the same time, not only the herbicide effect is not good, but the thistle is more and more removed, what is going on?
Some people even said that this little thistle is a biological weapon dropped by foreign countries?
In fact, things are not so complicated, although farmers actively control the small thistle, in addition to the resistance to herbicides, resulting in incomplete weed control, so that the small thistle relapse, those due to the family of those who go out to work or do business, due to the failure to prevent and control in time, the mature seeds of the small thistle, blown up by the wind, just like dandelion seeds, pay attention to the landing for safety, encounter the right soil, and then re-take root and sprout.
Although thistle has developed resistance to glyphosate, but with the use of dimethyl tetrachloride, the effect is still very superior, but this is only suitable for weeding in the wasteland, if the field weeding, you can take glyphosate + brassicalide high concentration of application method, the same can be done to kill the grass and remove the roots more thoroughly.
For non-Asteraceae, legumes, solanaceous crops such as field eradication of thistles, you can try to use dichloropyridic acid, the herbicide due to the long residual period, it is recommended that you use it under the guidance of agricultural technicians.
2. Incense sticks
Fragrant appendages are also known as sedges, glyphosate has developed resistance, for some fields, such as bean fields, sweet potato fields and some medicinal materials, before the four-leaf stage can be used to control herb pine, older grass can take dimethyl tetrachloroisooctyl ester control (for dimethyl tetrachloride sensitive crops banned), special herbicides and chloropyrpyrimidinesulfuron, but this herbicide also belongs to the long residual period, to be used under the guidance of agricultural technicians.
3. Water peanuts
The scientific name is drought-loving lotus grass, an exotic species, native to South America, it is rumored that the Japanese invasion of China is introduced as horse feed, after wild flooding, listed as "China's first list of invasive alien plants", in recent years there are more signs of outbreak in the dry field, herbicide resistance is stronger, only chlorofluoropyroxyacetic acid and glyphosate two herbicides have a better effect, and areas with high resistance can be combined.
4. Purslane
Rural commonly known as horse bee vegetable, also known as undead grass, because this weed life ability used to be strong, if not cleared out of the field in time after pulling out, even if only one stem and leaf are left, in a few days, it is a new life body, due to its own skin and thick flesh, the antibody to a variety of herbicides is larger, but one thing drops one thing, acetylene fluorosole is the biggest nemesis of purslane.
5. Gynostemma blue
If according to the ranking of malignant weeds, gynostemma blue definitely has the strength to enter the top three, rural people have an old saying, called "gynostemma blue can grow as long as its root system is long", as a vine weed, you can imagine how deep its root system is, and it is difficult for general systemic herbicides to achieve the effect of cutting grass and removing roots.
Only chlorofluoropyroxyacetic acid has a good effect on gynostemma and is a perfect combination when used with glyphosate.
6. Small flying puff
As mentioned at the beginning of this article, Xiaofeipeng is one of the few weeds that are resistant to glyphosate, which shows the tenacity of its vitality, but the special effect of glufolium on The small flying puff, such as in addition of acecarboxylic fluorosole, is a very perfect combination of formulas.
7. Turnip grass
Commonly known as Shibula Seedling, it is a perennial climbing herb, wondering how harmful it is? A three-year paulownia tree or poplar tree, if not controlled, the grass can climb the tree tightly and tightly, seriously affecting the growth of trees and crops, if the grass is not controlled in advance, once spread, because of its dense and aggressive nature, it has caused difficulties for the application of pesticides, generally in the early stage of growth to take glyphosate + dimethyltetrachloride formula for eradication, the effect is more thorough.
8. Beef tendon grass
It is a grass weed with strong resistance, and the effect of using refined quinolin or alkenone alone is general, while the combination of high-efficiency flupiramide + glufolium phosphine is more thorough.
9. Field spin flowers
Commonly known as Fufu seedlings (sound), due to the developed root system, and vigorous growth, spring, summer and autumn can occur hazards, most herbicides are ineffective against it, dimethyl tetrachloride + ammonium glufosinate formula is worth a try.
10. Reeds
Wild reeds have become a common stubborn pest grass in the field, the reason why it is difficult to control, one is because the leaves and stems of the reeds are smooth, and have a layer of protective villi, so that the liquid is not easy to stick, and the second is because the root system of the reeds is too developed, and the spray herbicide is often in addition to the stems and leaves can not hurt the roots, which will also cause the opportunity of recurrence.
The more common formulations are glyphosate + high-potency flupiramide or + alkenone mixed with fine quinoquinone + spreader spray.
Some people say that there is nothing useless in this world, but it appears in an inappropriate position at an inappropriate time, such as incense sticks, thistles, gynostemma, turnip, purslane, etc., which are chinese herbal medicines, some are wild medicinal materials, some have been artificially planted, like purslane and bowl flowers seedlings are still very good wild vegetables.
Regardless of their own value, they appear in the farmland, and compete with the crops for nutrition, they belong to the range of weeds, even if it is difficult to eradicate, for agricultural technicians, it is necessary to find ways to eradicate.