Triketone and HPPD inhibitors have systemic conduction and can be absorbed by leaves, roots and stems of plants.
It is safe for corn, sweet corn, waxy corn and popcorn.
it's hard. what is the action mechanism of carfentrazone? Do you know the function characteristics? What are the targets for prevention and treatment? Let's take a look at it.
the mechanism of action of carfentrazone-ethyl is a contact-killing selective herbicide. In the process of chlorophyll biosynthesis under the condition of light, by inhibiting protoporphyrin oxidase, toxic intermediates are accumulated, thus destroying the cell membrane of weeds and causing the leaves to dry up and die quickly.
carfentrazone-ethyl was absorbed by plant leaves within 15 minutes after spraying, and it was not affected by rain. After 3-4 hours, weeds showed poisoning symptoms and died in 2-4 days.
the action characteristics of carfentrazone-ethyl are that it kills weeds quickly, is less affected by low temperature, and has wide application opportunities. Because of its good low temperature resistance and rain erosion resistance, carfentrazone-ethyl can be used when the temperature drops to a very low level before winter, and can also be used in time between rainy days in spring with frequent rainfall, and it is very safe for subsequent crops, so it is an excellent herbicide for wheat field in spring.
the efficacy of carfentrazone has a certain relationship with light conditions. Good light conditions after application are conducive to the full efficacy, while cloudy days are not conducive to the normal efficacy.
when the temperature is above 1℃, the weeding speed is fast, and it will take effect in 2-3 days, but the weeding speed will slow down in the low temperature period.
The control target of carfentrazone is wheat, barley, rice, corn, etc. Because its half-life in soil is only a few hours, it is also safe for the next crop.
it is mainly used to control broad-leaved weeds and sedges such as Rhizoma anemarrhenae, wild sesame, Veronica, abutilon, Polygonum aviculare, Chenopodium album, Polygonum perfoliatum, Polygonum perfoliatum, Polygonum perfoliatum, Polygonum perfoliatum, Amaranthus retroflexus, Amaranthus tricuspidata and Polygonum perfoliatum.
it has excellent control effect on weeds such as Rhizoma anemarrhenae, abutilon, Chenopodium album, Toona sinensis, Euphorbia helioscopia, Maijiagong, Petunia canadensis, etc., and has good activity on weeds resistant to sulfonylurea herbicides.
the application technology of carfentrazone-ethyl should choose the right time to give full play to its efficacy.
The pesticide should be applied in the morning and evening when the temperature is low and the wind is light; Before 8 o'clock in the morning and after 4 o'clock in the afternoon on sunny days, the temperature should not exceed 3℃ but not lower than 5℃, the air relative humidity should be higher than 6%, and the wind speed should not exceed 4m/s, otherwise the application should be stopped.
Suitable application time: the 2-3 leaf stage of weeds is a good application time, and it is forbidden to apply pesticide after jointing stage of wheat. Because of the limitation of action mechanism (no systemic activity), the herbicide should be sprayed comprehensively and evenly to make all weeds fully coated, which is ineffective for weeds growing after application. Remember that it cannot be applied to broad-leaved crops.