Baoying County Zhou Zhengqing came to the call on June 7th: A local farmer mistakenly sprayed 30 ml of 42% DF butyl chloraldoate (6% fosperidone and 36% butachlor) before and after 8 am today to 0.3. On the dry rice seedlings of acre rice, rice seedlings are in the 2-leaf heart stage when spraying. He asked whether the accidental spraying of butachlor would not kill the rice seedlings.
?Bubutachlor is a compounding agent of ?-trimethalone and butachlor, which is suitable for the soil sealing treatment before rice seedling so as to prevent various kinds of annual miscellaneous crops such as barnyardgrass, alien sedge, apatula, and festival vegetables. grass. Generally, after sowing rice with water, 42%?f butyl chlorate EC 100-150 ml plus 30 kg of water spray. It is also possible to spread the mixed soil after the rice is transplanted into the live tree and carry out the soil sealing treatment. After the application of the pesticide, the field water can not drown the heart.
Butachlor is a selective pre-emergence herbicide that is mainly absorbed by young shoots of weeds, inhibits the normal growth and development of weeds and young roots, and ultimately kills weeds. It is easy to contact butachlor in the rice coleoptile and seedling leaves. A phytotoxicity occurred. F-chrysone works through the contact and absorption of weed seedlings or seedlings with the medicinal agent, causing greater damage to buds and rice seedlings. The spraying of butachlor at the heart stage of 2 leaves of rice seedlings may cause phytotoxicity to rice seedlings.
According to a researcher from the Institute of Agricultural Sciences of Yunnan Academy of Agricultural Sciences, the amount of butyl oxalate used in the above-mentioned erroneously sprayed plots is not too large, and it should not cause rice seedlings, but it may cause rice seedlings. After pouring the medicine in time, splashing water and flushing it can reduce the amount of drug absorbed by the young leaves of the rice and reduce the symptoms of injury. After the above measures are taken, remedial measures are taken according to the growth conditions of rice. If the 4-5 large rice seedlings show symptoms such as short dwarfing after the application of pesticides, appropriate amount of urea can be used to promote plant growth. After the seedlings resumed their growth, proper management did not have much effect on the later yield.
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