Glyphosate is not effective against tendon, how to break?

In the crop growing areas such as melon beans and solanum, buying herbicides to prevent cowgrass has become a frequent reason for farmers to patronize agricultural stores. The growers generally reflected that the cow grass grows quickly and requires frequent drug fights. With 1 mu of vegetable land, the annual herbicide will cost about 130 yuan. The old grass is not easy to be killed. It is a headache.

Over the past few years, the inbred grass has spread rapidly, and people in the industry think that it is mainly because of the characteristics of weeds and their enhanced resistance to drugs. In the past, 50 gallons of glyphosate was used to kill goosegrass. The effect of increasing the concentration to 100 ml or even higher concentration is not obvious. As a result, many farmers shop owners are generally no longer recommend glyphosate as a preventive drug.

It is understood that the genus Gossypium is a weedy weed of the genus Gramineae and has a well-developed and deep root system, and its ability to withstand drought and growth is particularly strong. With the extensive use of herbicides such as paraquat and glyphosate, the metabolic capacity of weeds has changed. The self-selection continues, and the resistance of the surviving offspring to weeds is increasingly evident, and weeds are becoming more and more adaptable.

With regard to the problem of resistance to glyphosate by goosegrass, glyphosate manufacturer technicians stated that the herb is a drought-tolerant weed, and the waxy layer on the surface of the leaves is thick, and the quality of some additives in the glyphosate formulation Poor, affecting the spread of the drug on the surface of the weed, it is difficult for the drug to effectively enter the weeds, and the efficacy of the drug is greatly reduced.

"Gluphosaminophosphonate + clethodim" becomes mainstream pharmaceutical

Glyphosate retreats on the barnyardgrass and gives other herbicides a chance to “upstream”. Glufosinate, clethodim, and quizalofop to replace glyphosate have become the mainstay of farmer households against tendongrass .

It is understood that the current control of goosegrass is mainly used glufosinate, and most agricultural resources shop will recommend the farmers to be sprayed with clethodim, glufosinate (100 ml / barrel of water) + clethodim (30 ml / The combination of barrels of water has almost become a "sauce handkerchief" for the prevention and treatment of barnyardgrass in agricultural stores. The reason is that glufosinate can quickly kill grasses, but it can also kill other weeds. It is safe for crops, but its effective period is short, only 15 days. At present, there are agricultural stores that reflect the emergence of glufosinate resistance. Farmers will experience slow or incomplete death due to weeding at a dose of 100 ml per barrel of water. While clethodim has a special effect on Gramineae goosegrass, combined with less application before, there is no resistance at present, although it takes 6-7 days to see the efficacy, but the effective period of up to 45 days, the two components together Can be described as complementary advantages.

Whether it is glufosinate alone or a combination of “glufosinate + clethone”, the most direct impact on farmers is the increased cost of pesticide application. Glufosinate is required to contain 10-12 water per barrel of water (100 ml/barrel). Yuan, while glyphosate was only 4 to 5 yuan per barrel of water.

New combinations continue to emerge

Although glufosinate and clethodim are currently popular choices for control of goosegrass, some combinations of pesticides in field trials have also demonstrated excellent control effects on goosegrass. For example, glufosinate plus the import of Anrongle additives can effectively promote the absorption of glufosinate, and the synergistic effect is more than 30%. Compared with the control field, the time for dead grass is more than half ahead of time, and dead grass is not complete. Turn green, and it will rain at low temperature or after spraying for half an hour. The efficacy will not be affected.

In addition, some companies have used pharmaceutical formulations to improve the efficacy of glyphosate, so that they still play a cost-effective advantage.

For example, the market recently introduced "glyphosate + fluaziloxacin" compound of the agent. The prazifluazin can effectively control the tendon, and the glyphosate can still play its role in killing other weeds, and the price is lower than the single glufosinate, and the current market response is good.

It should be reminded that the selection of herbicides against tendon is important, but the timing of prevention and treatment cannot be ignored. The weeding habit of farmers is generally to see that the grass grows taller and grows longer before it is sprayed. However, it is extremely difficult to control the weeds such as goosegrass when they grow taller. It is recommended that the tendrils grow to 3～ When 4 leaves are used, the best control effect is achieved. Even a small dose of glyphosate can kill it.

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