Rice does not need to rush to destruct

Sunyongping, Huayang Town, Jurong City came to the telephone on May 31th to report that the local 1 mu dry direct seedling paddy field mistakenly used 2-methylisopropenone and oxadiachlor for closed weeding on the day of rice sowing, 40% per acre. 2 60 mg of methylprednisolone wettable powder. This field was sown with rice seeds that had been soaked but not germinated. He asked whether the rice will be harmed by acetaminophen or whether it will be destroyed or replanted.

It is understood that isoproturon is a urea selective pre-emergent and post-emergent herbicide and is suitable for controlling crops such as wheat, barley, corn and beans in addition to annual grass weeds and some dicotyledonous weeds. The tolerance of rice to Isoproturon is stronger, and Isoproturon can be used to seal the soil before seeding in the rice field. Rapid removal of 50% of benzylidene isopropenol wettable powder was registered for direct soil treatment of paddy fields. Isoproturon has a strong inhibitory effect on the germination and emergence of rice seeds and is generally required to be used after the germination of rice to the needle stage.

2A 4 chlorine is a phenoxyacetic acid selective hormone herbicide suitable for the control of broadleaf weeds and Cyperaceae weeds in rice, wheat, corn and other grass crops. The susceptibility of 2 A 4 Cl in different growth stages of Gramineae crops varies. The seedling stage is very sensitive. After 3-4 weeks of leaf stage, the resistance gradually increases, the strongest at the end of the tillering stage, and the sensitivity to the spikelet differentiation stage increases again. It should be applied from the 4th leaf stage to the jointing stage.

40% 2 Metronuron wettable powder is registered for the control of broadleaf weeds and sedges in rice transplanting fields. The recommended dosage per hectare is 360-420 grams, equivalent to 60-70 grams per acre. According to researcher Yuan Yuanlai, an expert from the Provincial Academy of Agricultural Sciences, in the sowing of dry direct rice fields without germinating rice seeds, 40% of 2 methylprednisolone wettable powder 60 grams per acre may cause phytotoxicity to rice. Since isoproturon can be applied before the germination of rice seeds, 2A and 4Cl mainly absorb and transmit through the leaves of the plants, mainly to keep the soil dry, and will not affect rice emergence. It is suggested that this field should not be destroyed and replanted immediately. You can check the germination situation of rice. If germination is normal, partial dry management can maintain normal emergence. If germination is inhibited, planting rice should be changed.

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