Greenhouse and field evaluation of a novel HPPD-inhibiting herbicide, QYM201, for weed control in wheat

by:BrightMart     2020-03-01
QYM201, 1-(2-chloro-3-(3-cyclopropyl-5-hydroxy-1-methyl-1H-pyrazole-4-carbonyl)-6-(Trifluoride methyl)phenyl)piperidin-2-one)
Is the newly developed HPPD-(4-
2-oxide phenol; EC 1. 13. 11. 27)
Herbicide for weeding.
Experiments were conducted to determine the effects of QYM201 on wheat weeds in greenhouses and fields and their safety.
The results showed that at the dose of 90 and 135g active ingredients (a. i. )
Ha-1 QYM201 is very effective for both grass and broad grass, such as horse foot grass.
See the wheat Niang Steud wheat winter grass, cabbage bag-pastoris Medic.
In the wheat hybrid resistance test, QYM201 showed a high degree of safety for most of the 17 tested wheat hybrid combinations, with SI values reaching ≥ 5.
In the study of selectivity index 7.
In order to determine the application rules of QYM201, field experiments were conducted in 2016 and 2017.
During this time, 90 to 270g. . i. ha−1 post-
Application of herbicide (POST)
Enough to meet the needs of all.
Seasonal control of bamboos.
Sophia ·[L. ]Schur.
, And marachim aquaticum (L. )Fires.
No damage was observed to the wheat plants.
In order to increase wheat yield and effectively control weeds, the amount is 90 to 80 grams. i.
Ha-1 is recommended.
To sum up, it is safe for the herbicide QYM201 to control winter weeds in wheat fields. Winter wheat (L. )
It is the second largest grain crop in China, with an area of 24.
The area is 1 million hectares and the output is 130.
2 million tons in 2015.
Weeds may cause serious losses in wheat production and may decrease by 15%. Steud. ,[Steud. ]Fern. ,Sobol. ,L,Medic. ,[L. ]Schur.
, And l are common examples of troublesome weeds in winter wheat fields.
When these weeds are not fully controlled, they will be greatly reduced.
The herbicide has been used for weed control in China since the beginning of 1990;
Nowadays, chemical weeding is producing highyielding crops.
Herbicide with different modes of action can kill target weeds by 90% ~ 99%. it is the most effective means of weeding at present;
However, this is not a free issue.
A case study showed that more than 252 weeds worldwide are resistant to 23 different herbicides.
In China, so far, nearly 30 weeds have become resistant to nearly 50 herbicides, with more than 10 different action sites.
Recently, Zhu.
It is reported that at least 12 kinds of weeds have been confirmed to be resistant to the main herbicides commonly used in wheat fields.
Specifically, in China\'s Jiangsu and Anhui provinces, a common troublesome weed has become resistant to about 20 herbicides.
Not only are these 20 herbicides included
Co-a enzyme (ACCase)
Fenoxapp and other herbicides-P-
That\'s the chlorine-
Except for the inclusion of ethyl ester enzymes (ALS)
Herbicide: benzoboxamine, yimaplon, sulfur long, penoxamine and pyrooxamine.
There is also a problem, that is, some herbicide weeds are narrow and occasionally cause damage to wheat plants;
For example, fluoxone is effective in controlling some broad weeds, but (L. )Medic.
Thionins and iodine thionins can kill most weeds, but sometimes damage wheat plants.
As a result, the widespread use of methyl thionins and iodine thionins in China has been restricted.
In another example, 2, 4-
Ding Ester has become a commonly used weed control herbicide in wheat fields in China, but it will cause harm to crops due to spray drift and evaporation;
This is particularly related to cotton.
In addition to the above problems, the widespread use of herbicides can also accelerate the succession of weed communities.
Therefore, the herbicide with new action sites has a wide range
It is urgent to use spectral weeding, high efficiency and safety on wheat. QYM201, (CHClFNO, 1-(2-chloro-3-(3-cyclopropyl-5-hydroxy-1-methyl-1H-pyrazole-4-carbonyl)-6-(Trifluoride methyl)phenyl)piperidin-2-one; Fig. )
Is a new type of HPPD-
Anti-herbicide developed by Qingdao Jingen Chemical Company, Ltd. in 2011. 4-
Benzene-based acetone double oxygen enzyme (HPPD)
Is a class of alpha-keto acid-dependent non-heme iron (II)
Oxygen enzymes that can be found in mammals, plants and most microorganisms.
4-oxidation reaction by HPPD
(HPP)
Generate the same body (HG).
Once HPPD is suppressed in plants, it is possible to prevent the biosynthesis of proxyquinone and hydrophenol, which leads to a decrease in the biosynthesis of carrot-like carrots, the blocking of the photosynthetic electron transport chain, and the photosynthesis is
Therefore, the treated plants will be bleached to death.
Therefore, HPPD was selected as the target for the development of the herbicide.
As far as we know, HPPD inhibitors are not used in wheat fields anywhere in the world.
Therefore, we believe that QYM201 is a potentially beneficial herbicide, especially for resistance to wheat fields and harmful weeds.
In order to determine the spectrum of weed control, the safety of different wheat hybrid combinations, and the selectivity of QYM201 in 3 common wheat hybrid combinations and 4 common weeds, experiments were carried out in the greenhouse.
In addition, field tests were conducted in order to determine the dispersion of different 6% QYM201 oil for weeding in winter wheat fields (OD)
Growing season in Shandong province 2015-2016 and 2016-2017.
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