1 Herbicides use increasing doses

As the weed resistance increases, it is difficult to prevent the increase of weeds, and the dosage of herbicides is continuously increased, which in turn causes the weeds to be more resistant. For example, the application of tribenuron-methyl from the first few acres of ground into Now 50 grams will not work. However, in fact some pharmaceuticals are not necessary to blindly increase the dosage, such as floxolam, which has been favored since its introduction. The dosage used by farmers has been increasing year by year. In fact, his spectrum of prevention and control is narrow. The main advantage is that Anti-low-temperature effect is good, increasing the amount of no significance, but will increase the resistance of weeds to the product, increasing the cost of household medication.

2 resistant weeds develop faster

Although the occurrence of large number of malignant weeds, but not the most difficult to control, and weeds have become the weakest people the most troublesome problems, such as: the resistance of Artemisia annua in Hebei Province, shepherd’s purse is basically no agent can guarantee absolute Prevention and treatment; Jiangsu and Zhejiang and other places to see Amanita, Poa, Blue grass, ryegrass and other weeds resistance is very serious, improper control, weeds and wheat as much, or even longer than the wheat is also high.

3 products to the program over

Weeds in a wide range of wheat fields, and the herbicides have a certain selectivity, a single species of herbicides can no longer effectively control weeds, the same product used in different plots will have a different effect. Therefore, weeds for different plots of the status quo need to use different herbicide formulations, herbicides single component has been unable to meet market demand, weeds can not effectively solve the problem, weed solutions are particularly important. The so-called no perfect product, only the perfect solution.

4 grass weeds increased

Most of the grass weeds were concentrated in the paddy-wheat rotation area, which was more serious and had a large amount of occurrence. However, in some dryland rotation areas in northern China in recent years, the occurrence area of ​​grass weeds in wheat fields showed an increasing trend year by year. In particular, Festival wheat, brome, ryegrass and other difficult to control the grass weeds area continues to increase.

5 new weeds increase

We used to divide weeds into vicious weeds, resistant weeds, weed rookies (new weeds). The first two years of new weeds, such as: Veronica, chickweed, although difficult to control, the occurrence is not large, the harm is not serious on wheat. However, since last year, the new weed has increased its area of ​​harm in some areas and even become the major weed that is difficult to control.

6 farmer medication level of skill

With the increase of resistance to wheat, there is no effective control agent, and only metsulfuron-methyl in the market has certain anti-drug effect on it. However, it is very easy to cause phytotoxicity in cold weather. Because of metsulfuron-methyl Occurrence of disputes often occur, many farmers refused to use the product. However, with the maturity of technology used (most farmers know the weather before use and the dosage is controlled within 30 ml), this product is rejuvenated and even become an indiscriminate product in many areas.

However, according to everybody’s reaction, farmers are not afraid of pesticide damage, but they have no alternative but to cut off wheat. If they do not control it, the output of wheat will drop very much. Even the most serious ones will not even have a harvest. Secondly, many harvesters will refuse to accept this Wheat (afraid to carry nourishment wheat seeds spread), so everyone would rather risk the injury also use this product.

7 weeding no longer consider the cost

For farmers, the price of the product affects the purchasing habits of farmers, and the affordable products are usually the first choice for farmers. However, with the increase of weeds, the weeds and weeds are becoming more and more serious. The general weeding Varieties of pesticides have not been able to solve the problem of farmers on the market continue to increase the new agents, weeds can not be effectively solved the problem, of course, the cost is not so important, at least not the first consideration of elements, as long as the weed control, your point is also It does not matter, the ability of farmers to accept herbicides significantly stronger.

8 fanatical pursuit of new drugs

It used to be difficult to promote a new product. Now which company launched a new product, as long as it is on the market are difficult to prevent weeds have special effects, flew immediately hot, dealers, businesses are very concerned about the new product trends, dealers in advance to pay the advance payment is a normal phenomenon! Enterprises to speed up the registration of new product documents, farmers also demand urgent, do not care about the price. For example, more popular nowadays are the new components of difloxacin, flufenamide, and pinoxaden.