Methoxy imazethapyr

Common Name methoxy imazethapyr (imazamox)

Name of the beans (Jin Dou, Raptor)

Chemical name 2 - (4 - isopropyl -4-- methyl -5 oxo -2-- imidazoline -2-- yl) -5-- (methoxy-methyl) nicotinic acid

Physical and chemical properties of the original drug melting point 166 ℃, vapor pressure of less than 1.3 × 10-5Pa, Kow5.36 (25 ℃), at pH5 ~ 7.9 buffer solution for 30 days without hydrolysis, solubility (g / 100 ml) are: 0.0006 n-hexane, methanol 6.68, 1.85 acetonitrile, toluene 0.21, acetone 2.93, 14.3 dichloromethane, ethyl acetate 1.02; in the wide range of pH conditions affinity with water under, absorption small. Methoxy imazethapyr light sensitive.

Preparations for the clear yellow viscous liquid, the proportion of 1.07 g / ml, room temperature storage stability under hot and cold more than 3 years.

Toxic methoxy imazethapyr very low toxicity to mammals, the original drug oral LD50 in mice and rats is greater than 5000 mg / kg LD50 Rabbit percutaneous> 4000 mg / kg, rat inhalation LC50 is greater than 6 .3 mg / liter. There was no stimulation of the eyes and skin effect, is not teratogenic, carcinogenic and mutagenic, it is in the storage and use is very safe. Preparations male, female rats acute oral LD50 greater than 5000 mg / kg, acute dermal LD50 in rabbits is greater than 4000 mg / kg, rabbit acute inhalation LC50 is greater than 6.6 mg / liter. Rabbit eyes and skin irritation.

Preparation of 0.8%, 4%, 12% methoxy imazethapyr agent, 70% methoxy imazethapyr WG and water-soluble granules, methoxy imazethapyr and pendimethalin (Shi Tian S) mixture, currently in China to promote the application of 4% aqueous

Characterized as methicillin imazethapyr to imidazolinone herbicides, absorbed through the leaves, transfer and accumulation in the meristem, inhibition of AHAS activity, resulting in branched-chain amino acids - valine, leucine and isoleucine biosynthesis stop interfering DNA synthesis and cell mitosis and plant growth, eventually leading to plant death. Plant roots can absorb the methoxy imazethapyr, but far less absorption of other varieties of imidazolinone herbicides, such as herbicides, quinoline (Scepter) 80% root resorption, root resorption 60% Pu Shite, methoxy imazethapyr Only 21% of root resorption, thus methoxy imazethapyr postemergence soybean fields for leaf processing, before the use of vaccine is not recommended. Weed injury symptoms are: First of all weeds growing point and the internode meristem yellow, brown necrosis, purple heart leaves turn yellow before dying. Annual grass weeds in 3 to 5 leaf stage, death takes 5 to 10 days before broadleaf weeds become brown veins, leaf wrinkled, withered leaves the heart, usually 5 to 10 days of death.

For soybean crops.

Control target methoxy imazethapyr can effectively prevent most annual grasses and broadleaf weeds, such as wild oat, barnyard grass, Setaria, Setaria gold, Alopecurus, millet, daughter son, crabgrass, Commelina (3 leaf stage before), Solanum nigrum, Abutilon, Amaranthus retroflexus, Chenopodium, small pigweed, cocklebur, Elsholtzia, water spine needle, Bidens, chickweed, willow thorn Polygonum, ferret flap flower, shepherd's purse, etc., on the perennial The Sonchus Cirsium dishes was inhibited.

Methoxy imazethapyr application technology of pesticide application in the seed germination period should commence after the two true leaf to leaf to start the second film three drugs during this period, keeping in mind that grass weeds should be 2 to 4 leaf stage, broadleaf weeds should be 2 to 7 cm high. Control cocklebur Xanthium 4 leaves should be sprayed before, the difference is not unearthed Xanthium efficacy. 2 Combat Commelina leaf spraying best, 3 leaves after spraying efficacy of the poor.

4% per mu methoxy imazethapyr agent 75 to 83 ml (3 to 3.32 g active ingredient), notes the use of low dose spray volume by adding 2% ammonium sulfate, soil moisture suitable, strong growth of weeds and when young with a low dose of weeds, drought conditions and difficult to control weeds for a long time with high doses.

All fields with a pesticide can be sprayed or seedlings, labor knapsack sprayer spray volume of 20 to 40 liters per acre, tractor sprayer 10 to 14 liters. Can not use ultra-low volume sprayers or knapsack sprayer for ULV spray liquid concentration is too high due to phytotoxicity. Fan-shaped spray nozzles should be selected manually, along ridge by ridge spraying, set the spray pressure, nozzle distance, ground height and walking speed, application can not fluctuated, unsteadiness, not about swinging, to ensure spraying evenly.

Manual spraying should pay particular attention, in the amount of pesticide spray before doing the test. Specific steps:

(1) to spray the water spray test to check for leakage problem;

(2) traffic measurement. Will be added drugs bucket of water, select a certain pressure, the manual switch for 1 minute, allow water to flow into a container, the amount of flow cup for 1 minute;

(3) Determination of effective spray rate, the choice of 2.5 kilograms per square centimeter pressure nozzle from the top of soybeans from 0.5 to 1.0 meters, nozzle down, turn on the switch, spraying rod does not move half a minute to observe the ground plant wet the width of the leaf, the width of the spray is called the effective rate;

(4) walking speed calculations. Spraying according to the following formula can be obtained when the walking speed, walking speed typically 1.0 to 1.3 meters per second.

Walking speed (m / s) = [flow (ml / s) × 666 (m 2 / mu)] / [spray volume (ml / acre) ×

Effective spray width (m)]

In addition, the use of furrow spray directed approach can improve the safety of soy. Spraying nozzle can be aligned when the furrow, so that two adjacent pieces of the edge of the jet stem base of soybean cross-(anti-weed seedlings eyes), this reduces the amount of soybean leaves with the drugs, the adverse environmental conditions, improve the safety of soy.

Sooner or later should choose low temperatures, humidity when spraying. Best night spraying, generally 8 to 9 am before the sunny, 16 to 17 effective time after spraying. When the relative humidity below 65% or windy days should stop spraying, spraying when wind speed is not higher than 4 meters per second in wind conditions, the artificial spray nozzle should not arbitrarily reduce the height of the whole field will be sprayed into seedlings with the pesticide, resulting in increased local drug content, easy to make soy victims; spraying liquid was added 2% ammonium sulfate, artificial spray 25 to 50 liters per acre, tractor spray 13 liters, are synergies. In the normal water conditions, with 4% per mu methoxy imazethapyr agent 75 ml, obtained stable efficacy. Synergist YZ-901, YZ-905, AA-921, Department of mineral oil by adding trimethoprim imazethapyr increased efficacy, phytotoxicity has also increased, should not be optional. When sprayed per acre yield by adding rice vinegar 100 ml and 10 ml concentrated liquid bacteria or beneficial micro-powder 10 grams, the adverse environmental conditions can enhance the safety of soy, can promote growth, reduce injury and yield increase. Should pay attention to weather forecasts before spraying after application should be kept within 1 hour without rain.

Mix: soybean field north of Heilongjiang Province for many years such as the use of herbicides, weed community changes, more intractable weeds such as wild oats, wild millet, cocklebur, nightshade, ferret flap flower, Commelina communis, Equisetum, Sonchus vegetables, Cephalanoplos large Cephalanoplos, reed. Effects from the weed and to consider the safety of soybean, methoxy imazethapyr and imazethapyr can be, build brand clomazone agriculture, Tiger, build brand Bentazon Agriculture, g W music, burning weeds and other mix. Mixed composition and the amount per acre as follows:

Methoxy imazethapyr 4% and 5% 50 ml 50 ml Imazethapyr

4% 50 ml methoxy imazethapyr plus 48% of the construction of agricultural license clomazone 50 ml

4% of the methoxy imazethapyr plus 25% of the Tiger 60 ml 50 ml 40

4%, 60 ml of methoxy imazethapyr license additional 40% of agricultural Bentazon 100 ml

4% of the methoxy imazethapyr plus 21.4% 60 ml 40 ~ 50 ml of burning weeds

4% of the methoxy imazethapyr plus 24% g 60 ml 20 ml wide music

When Sonchus Wenjing, Cephalanoplos, Commelina serious harm, the methoxy imazethapyr card with built clomazone agricultural, construction of agricultural license Bentazon mix; when Commelina communis, Sonchus , Equisetum serious harm, the methoxy imazethapyr with Tiger (fomesafen) mix; when the duck jump grass, black nightshade serious harm, the methoxy imazethapyr can be mixed with the burning of weeds; as Solanum nigrum, duck jump grass, Sonchus against methicillin imazethapyr severe gram wide music mix with.

Succeeding crop of security: methoxy imazethapyr imidazolinone herbicides is a short residual species after application most of the decomposition of soil failure in the pharmaceutical, after which the vast majority of crop safety, in a year mature region of a rotation will not damage the succeeding crop, but when mixed cropping, intercropping and multiple cropping, the need to consider the sensitivity of different crops and the interval period, the table below.

Methoxy imazethapyr using 3.3 grams active ingredient / acre, planting crops required interval (months)

0

4

12

18

Soybean

Barley

Spring

Winter

Rice (without beds)

Cotton, millet, millet

Sunflower, tobacco

Potato

Watermelon

Rape

Beet

Registration of soybean crops in other countries.

Notes

1. Methoxy imazethapyr applied 2 days after the case of temperature below 10 ℃, soy-methoxy-imazethapyr reduced metabolism, could easily lead to injury, the low-lying land in the north and the mountains should not be used in cold area methoxy imazethapyr .

2. Methoxy imazethapyr spray can not add synergist YZ-901, AA-921.

3. Methoxy imazethapyr spray must be uniform.