The more the dose of the herbicide is used. With the increase of weed resistance, it is difficult to prevent the increase of weeds, the dosage of herbicides is continuously increased, and the weed resistance is more serious. For example, the application of bensulfuron has changed from the first one mu of a few acres. Now 50 grams are not working well. However, in fact, some medicines do not need to increase the dosage. For example, diflufenacil is favored from the launch. The dosage of farmers is one year larger than one year. In fact, its prevention spectrum is narrow, and the main advantage is that The anti-low temperature effect is good, and there is no substantial significance in increasing the dosage. On the contrary, the resistance of the weeds to the product is enhanced, and the cost of medicine for the farmers is increased.
The development of resistant weeds is accelerating. Although malignant weeds are currently occurring in large quantities, they are not the most difficult to control, and resistant weeds have become the most troublesome problem. For example, for resistant stalks and leeks, basically there is no medicine to ensure absolute control. In some areas, the resistance of Japanese maiden, bluegrass, valerian, ryegrass and other weeds is very serious. Improper, weeds are as much as wheat, and even grow taller than wheat.
The product is over-provisioned. There are many kinds of weeds in wheat fields, and they have certain selectivity to herbicides. Single herbicides can not effectively control weeds, and the same product can produce different effects on different plots. Therefore, the current situation of weeds in different plots requires different herbicide formulations. Single-component herbicides can no longer meet market demand and cannot effectively solve weed problems. Weed solutions are especially important. This is the so-called "no perfect product, only the perfect solution."
Gramineous weeds increased. Most of the grass weeds in the wheat field were concentrated in the rice and wheat rotation area. In recent years, in some dryland rotation areas, the area of ​​grass weeds in wheat fields has increased year by year, especially in the wheat, brome, and black. The area of ​​grassy weeds that are difficult to control such as wheat straw is increasing.
New weeds increase. In the past, weeds were usually classified into malignant weeds, resistant weeds, and weedy newcomers (ie, new weeds). In the past two years, new weeds, such as mother-in-law, and stagnation, although difficult to control, the amount is not large, and the damage to wheat is not serious. However, since last year, new weeds have increased the area of ​​damage in individual areas, and even become the main weeds, which is difficult to control.
The level of drug use by farmers has increased. With the increase of resistance to wheat, there is no specific control agent. Only methyl disulfuron has certain control effect on the market, but it is highly prone to phytotoxicity in low temperature, each year due to methyl disulfuron. The phenomenon of disputes has occurred frequently, and many farmers refuse to use the product. However, with the maturity of the use technology (most farmers know how to use the weather before the use, the amount is controlled within 30 ml), the product has a new vitality, and even exploded in many areas.
Weeding no longer considers costs. The price of products affects the purchasing habits of farmers. Affordable products are usually the primary choice for farmers. However, as the amount of weeds increases, malignant weeds and resistant weeds become more and more serious, and the general herbicide varieties are no longer effective. Even if the new types of pharmaceuticals in the market continue to increase, the problem of weeds cannot be effectively solved. The cost is of course less important, at least not the first factor to consider. As long as we can control weeds, it does not matter whether you need to control herbicides. The ability to price has become significantly stronger.
Crazy pursuit of new drugs. It has been difficult to promote a new ingredient in the past and it takes a long time. Now which company launches a new product, as long as it has special effects on some difficult weeds, it is very popular. Distributors and enterprises all over the world are very concerned about the trend of new products. It is normal for dealers to pay advance payment in advance. The speed of registration of new product certificates by enterprises is increasing, and farmers are also in urgent need of price. For example, the current popular new ingredients are flufenacetamide, fluorothiazamide, oxazolinol and the like.
(Article source: Anhui Daily)
Electroplating Chemicals Additive
In electroplating process, in order to improve the quality of the coating, a variety of chemicals need to be added to the bath. These chemicals are collectively called plating additives. Electroplating additives are mostly organic compounds, which can be divided into complexing agent, brightener and auxiliary brightener, leveling agent, pinhole remover, dispersant, wetting agent, smoke inhibitor and so on according to their working months in the electroplating bath.
Electroplating Chemicals
Sodium Dihydrogen Phosphate Chemical Formula,Sodium Dihydrogen Phosphate Merck,Monosodium Phosphate Anhydrous,Sodium Dihydrogen Phosphate Molar
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