The invention relates to the application of ragweed essential oil as a herbicide. After dissolving the ragweed essential oil in acetone aqueous solution, it is diluted 20 \u2011 50 times, and sprayed in accordance with the spraying concentration of 50 \u03bc L / ml before and after the emergence of field weeds such as Dogtail grass, Kentucky bluegrass, alfalfa and amaranth. The test results show that when the ragweed essential oil is at a low concentration of 0.5 \u03bc L / ml, the growth of single dicotyledonous weed seedlings can be significantly inhibited When the concentration is more than 2 \u03bc L / ml, the growth of the seedlings of the tested plants, such as Dogtail grass, Kentucky bluegrass, alfalfa and amaranth, is inhibited by more than 50%; when the concentration is more than 5 \u03bc L / ml, the germination of the seeds is completely inhibited or the seedlings are severely poisoned and die; the essential oil of ragweed is a natural component, which can be decomposed rapidly in nature without polluting the environment, and can be used in organic agriculture Weed control. The essential oil of ragweed is extracted from the above ground part of ragweed plant, which is not only beneficial to environmental protection, but also comprehensive utilization of harmful plants.
【技术实现步骤摘要】
豚草精油作为除草剂的应用专利
本专利技术涉及将提取自外来入侵植物豚草植株的地上部分精油作为除草剂的应用。
技术介绍
应用传统的随机合成筛选模式成功开发新除草剂的几率已越来越小,且合成化学除草剂易于在自然界中长期留存造成的环境毒性及药害问题也日益严重。而从自然界中提取的天然除草活性化合物具有易生物降解、无残留、毒性低、开发费用少等合成除草剂无法比拟的优势,其研究日益受到人们的重视。尽管某些化学除草剂能够在土壤中分解,但是由于被长期大量地应用,杂草对除草剂逐渐产生了抗性,使得药效降低甚至丧失。在这种情况下,研发具有新颖作用靶点和作用机理的除草剂显得尤为重要。自然界里种类丰富、构型各异、作用机理多样的天然产物为此提供了可能。目前世界上已发现上百种具除草活性的天然化合物,有些已被开发为除草剂推广应用,甚至有些天然产物自身的除草活性可与化学除草剂媲美,如1,8-桉树脑。据报道人工合成的植物毒素和天然植物毒素作用的分子靶位很少有重叠,这样就可能通过植物源的次级化合物来发现具有新的作用靶位,且对环境友好的除草剂。豚草(AmbrosiaartemisiifoliaL.)为菊科豚草属的一种,一年生恶性杂草。自20世纪30年代开始从境外传入中国东北三省后,这种世界性危害草已在全国蔓延。形成了对自然植被、农业生产的巨大危害,参看文献1-3。豚草精油被报道具有抑制微生物生长及对田间害虫具有触杀等活性,但是豚草精油对田间杂草的生长抑制作用还未见报道,参见文献4-8。外来豚草由于生长迅速,生活力强,严重危害入侵地的农林牧 ...
【技术保护点】
1.一种豚草精油作为除草剂的应用,其特征在于,将该豚草精油用浓度为0.5%丙酮水溶液溶解后,稀释20-50倍,在田间杂草狗尾草、早熟禾、苜蓿和反枝苋出苗前后按照喷施浓度50μl/ml喷洒,每亩施用量为50-200克。/n
【技术特征摘要】
1.一种豚草精油作为除草剂的应用,其特征在于,将该豚草精油用浓度为0.5%丙酮水溶液溶解后,稀释20-50倍...
【专利技术属性】
技术研发人员:邵华,韩彩霞,张弛,周世兴,魏彩霞,梅宇,石凯,成真锐,黄岭,
申请(专利权)人:中国科学院新疆生态与地理研究所,
类型:发明
国别省市:新疆;65
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