Clear water: 2A and 4Chloride should be applied before the 4th leaf stage to the jointing stage of rice, and the risk of pesticide application before the 4th leaf stage is large. It is not recommended to apply it at the 2 leaf 1 stage of rice.
It is understood that Australia Newcomm Co., Ltd., Nong Duosi 56% 2 A 4 sodium chloride (registered for spraying in paddy fields to prevent broad-leaved weeds and sedges, recommended dosage per hectare of pure drugs 420 to 630 grams, equivalent 50-75 grams per acre agent), Australian tiger 750 grams per liter 2-methyl-4-chlorodimethylamine salt agent (registered for spraying rice in transplanted fields to prevent broad-leaved weeds and sedges, pure drug per hectare in southern rice area The recommended dosage is 450-562.5 grams, equivalent to 40-50 grams per acre. Products such as 40-50 grams per acre are of good quality and have less impurities. The risk of using phytotoxicity on rice is relatively small. It is also safe before and after the 3-leaf stage of rice, but the amount cannot be used. Large, according to the recommended amount of low-level application of pesticides, per acre with 50% of AMD 4 sodium chloride 20 ~ 30 grams or O Tiger 750 grams / liter 2 A 4 chlorodimethylamine salt 20 ml. When rice may be affected by poor conditions such as low temperature and poor growth, do not apply 2A 4 chlorine.
User Liu Hong: 2 A 4 chlorine is better at higher temperatures.
To new: What is the antagonistic effect of pyrazosulfuron on cyhalofop-butyl ester? I think that some people have mixed these two drugs in the past few years, and companies have registered the production of the two drugs. Some local users have reported that the combined use of pyrazosulfuron-methyl and cyhalofop-butyl methoxime has little effect on the prevention and control of Qianqin. Is it because the QianGold in these places is more resistant to cyhalothin? In some places, no one has reported that the control effect on Qianqin is declining. Is it because the QianGold in these places is not resistant to cyhaloflavin?
Clear water: pyrazosulfuron and cyanomethrin have antagonistic effects, and the mixed use will reduce the latter's herbicidal effect. Appropriately increasing the amount of cyhalofop- phoflorin can alleviate this adverse effect. Generally, the azosulfuron-methyl complex is used per acre. g, plus cyhalofop-methyl pure drug 1 to 2 grams can be. Now that the price of cyhalofop was low, mixing is feasible.
The resistance of weeds to cyhaloflavin is another matter. With the prolonged use of cyhalofop-butyl, weeds such as Qianjin will become more and more resistant to the drug.
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