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化学除草剂由于其本身所具有的优异特点,为广大农民所接受,使用范围越来越广,使用面积越来越大。然而,由于除草剂使用不当造成药害,长残效药剂对后茬的影响等问题也日益突出。磺酰脲类、咪唑啉酮类和三氮苯类除草剂的一些品种,如豆磺隆、绿磺隆、普施特和阿特拉津,具有用药量少、除草效果好、杀草谱广和用药成本低的优点,但这些除草剂品种在土壤中残效期过长(可达2-3年),对后茬敏感作物造成严重药害。到目前为止长残效除草剂的危害还没有被认识,在一些地区这些长残效除草剂品种仍然在大面积使用。因此应立即采取长短效除草剂交替或混合使用措施,降低长残效除草剂用量,以适应农业结构调整。
Due to its excellent characteristics, chemical herbicides are widely accepted by farmers and have become more and more widely used and used more and more. However, due to improper use of herbicides caused by phytotoxicity, the effects of long-acting pesticides on the stubble have become increasingly prominent. Some varieties of sulfonylureas, imidazolinones and triazoles as herbicides, such as tetrodon, chlorsulfuron, psoste and atrazine, have the advantages of less dosage, good herbicidal effect, herbicidal spectrum However, these herbicides have long residual effects in the soil (up to 2-3 years) and cause serious phytotoxicity to sensitive crops in the following stubble. Until now the dangers of long-acting herbicides have not been recognized and in some areas these long-acting herbicides are still being used on a large scale. Therefore, we should immediately take the short and long-term effect of alternative or mixed herbicides to reduce the amount of long-residue herbicides to adapt to agricultural restructuring.