Evaluation of weed control efficacy and crop safety of the new HPPD-inhibiting herbicide-QYR301

by:BrightMart     2020-03-02
QYR301, 1,3-Dimethyl-1H-pyrazole-4-
Acrylic 4-[2-chloro-3-(3,5-dimethyl-pyrazol-1-ylmethyl)-4-Toluene ester-benzoyl]-2,5-dimethyl-2H-pyrazol-3-
Yl Ester is a new type of HPPD-
Anti-herbicide, and was evaluated for post-emergence (POST)
Application of greenhouse and field conditions.
Crop safety (
Effective ingredients of 180 and Jingdong (a. i. )
Ha-1 treatment)
Experiments have shown that wheat, rice, garlic and corn are the only four crops that have not been injured at the level of the two herbicides.
Weeding effect (60 and 120u2009g a. i. ha−1)
The experiment shows that QYR301 has high control effect on many kinds of weeds, especially in rice fields.
In addition, it is interesting to note that susceptibility and multiple anti-herbicide echinoteca crus-galli (L. )Beauv.
And phyllopogon (Stapf)
Koss, two notorious weed species in rice fields, is still sensitive to qyr31.
Further crop tolerance results showed that the 20 tested rice hybrid combinations showed varying degrees of tolerance to QYR301, and that the tolerance of hybrid rice was higher than that of hybrid rice in greenhouse conditions.
The results of field tests showed that QYR301 was at 135-g. a. i.
Recommended full service ha-1
Season control of Ecrus-
Domestication of Gary and thousand goldL. )
Maximize rice production.
These results show that QYR301 has great potential in weed management in rice fields.
According to the Food and Agriculture Organization of the United Nations, weeds are one of the crop pests, which reduce crop economic output by 10 to 15% per year.
At the same time, weeds are also hosts of various crop pests and pathogens.
The herbicide with different action sites is by far the most effective weeding tool developed, killing 90-99% of the target weed.
More than 95% of cotton, soybeans, corn and sugar beet plantations in the United States use herbicides to control weeds.
In China, the use of herbicides has grown rapidly over the past 20 years and is an integral part of efficient food production.
Modern herbicide has been widely used worldwide, and in the past 50 years it has made a significant contribution to the high yield of crops and food quality.
However, due to the many advantages of the herbicide, farmers are over-dependent on crop fields and many other herbicide techniques, and the herbicide is inevitable.
Resistant weed populations will evolve as the herbicide selection continues to be applied to large weed populations in vast areas without diversity.
The evolution of weed-resistant herbicides is an obvious example of rapid evolution with significant negative consequences.
Weeds resistant to herbicides, especially major field crops (
Wheat, rice, corn, soybeans)
It is a common problem and a major challenge for global food production.
With the emergence of serious problems caused by different resistant weeds, it is urgent to have a new mode of action to manage the herbicide. Resistant to weeds.
However, for about 20 years, no major new modes of action have been introduced in the market, as the discovery efforts have been greatly reduced due to the emergence of glyphosate
Crop resistance, company merger and high
Venture capital is needed.
Another reason may be that the best molecular targeting sites for the development of herbicides have been found.
Therefore, the design and synthesis of new herbicides based on the identified molecular target sites has become the main method for researchers.
Now, resistance to ethyl
Offensive enzyme (ACCase, EC. 6. 4. 1. 2)
(2) inhibitor of acetone-phenol acid enzymeALS, EC2. 2. 1. 6)
Inhibitors and light system II inhibitors (PS II, EC1. 10. 3. 9)
48, 159 and 105 weeds were identified, respectively.
However, the resistance to benzene-based acetone dioxyase (HPPD, EC. 1. 13. 11. 27)-
Inhibition herbicide was detected in only 2 weedswide.
Considering the goal-site-
Based on herbicide resistance and cross
The latest generation of HPPD inhibitors is clearly a new hope to solve the current weed problem. QYR301, 1,3-dimethyl-1H-pyrazole-4-
Acrylic 4-[2-chloro-3-(3,5-dimethyl-pyrazol-1-ylmethyl)-4-Toluene ester-benzoyl]-2,5-dimethyl-2H-pyrazol-3-yl ester (Fig. )
Is a new type of HPPD-
Post-inhibition herbicide developed by Qingdao Jingen Chemical Co. , Ltd. , Ltd.
Shandong Agricultural University in 2011.
HPPD inhibitors are composed of Trione, isooxazole and pyrazole.
Trione and isooxazole are one of the most widely used herbicides, such as medium acetone and isooxazole.
Topamezone, a relatively new HPPD-
The inhibition of the herbicide, introduced commercially in 2006, belongs to the new chemical category of pyrazone.
QYR301 is also a chemical class of pyrazone.
So far, QYR301 has been registered for use in China.
Considering the diversity of crops and weeds in China, the goal of this study is (1)
By determining the efficacy of QYR301 on 31 common weeds and the crop safety of 22 crops in greenhouse conditions, find an applicable crop ,(2)
Determine QYR301-
Tolerance of 20 hybrid varieties of safe crops under greenhouse conditions ,(3)
In order to identify the selectivity between the hybrid and common weeds of common safe crops in China under greenhouse conditions ,(4)
To characterize the efficacy of QYR301 against weeds in greenhouse conditions, and (5)
Weed control, crop response and rice yield under field conditions were evaluated with QYR301 POST.
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