在棉花枯萎病新杀菌剂毒力测定中助溶剂的筛选?
2016-06-14黄倩韩新才王文生高玲易婷吴佩吴丽娜
黄倩 韩新才 王文生 高玲 易婷 吴佩 吴丽娜


引用:黄倩,韩新才,王文生,等. 在棉花枯萎病新杀菌剂毒力测定中助溶剂的筛选[J]. 棉花科学,2016,38(3):14-17.
Cite: Huang Qian, Han Xincai, Wang Wensheng, et al. The Cosolvent Screening of New Fungicides in Cotton Fusarium Wilt Toxicity Test[J]. Cotton Sciences, 2016, 38 (3): 14-17.
摘要:为了筛选对棉花枯萎病新杀菌剂毒力测定没有干扰的安全助溶溶剂。采用生长速率法测定了3种有机溶剂对棉花枯萎病菌的毒力和安全性。结果表明:丙酮、DMF和DMSO对棉花枯萎病菌的EC50值分别是161395.4、2704.8、1848.5 mg/L,以丙酮的毒力最低;其相对安全的质量浓度区间分别为0~161395.4、0~2704.8、0~1848.5 mg/L,抑菌率分别为0~9.2%、0~22.2%、0~6.8%,以丙酮最为安全。因而首选安全助溶有机溶剂为丙酮,其安全质量浓度区间为0~50000 mg/L。
关键词:棉花;枯萎病菌;毒力测定;安全溶剂;助溶剂
中图分类号:S482.92 文献标识码: A 文章编号:2095-3143(2016)03-0014-04
DOI:10.3969/j.issn.2095-3143.2016.03.003
The Cosolvent Screening of New Fungicides in Cotton Fusarium Wilt Toxicity Test
Huang Qian, Han Xincai, Wang Wensheng,
Gao Ling, Yi Ting, Wu Pei, Wu Lina
(Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China)
Abstract: In order to filter out the security cosolvent which has no interference in cotton Fusarium Wilt toxicity test of new fungicides, we adopt the growth rate method testing the toxicity and safety of three kinds of organic solvents for cotton Fusarium Wilt. The rusults show that the EC50 value of acetone, N,N-dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) of cotton Fusarium Wilt are 161395.4, 2704.8, 1848.5 mg/L, respectively, the toxicity of acetone is the lowest; their mass concentration interval of relative safety are 0~161395.4, 0~2704.8, 0~1848.5 mg/L, the bacteriostatic ratio are 0~9.2%, 0~22.2%, 0~6.8%, respectively, the acetone is the most safe. Thus, the first choice of security organic cosolvent is acetone, its safe mass concentration interval is 0~50000 mg/L.
Key words:Cotton; Fusarium Wilt; Toxicity test; Security solvent; Cosolvent
0引言
棉花是世界上最具经济价值的三大作物之一,棉花枯萎病是由土壤传播的病原菌尖孢镰刀菌(Fusarium oxysporum)侵染棉花维管束而引起的一种毁灭性棉花病害[1],是影响世界棉花高产的重要因素,由于棉花枯萎病防治难度较大,缺乏有效的防治药剂[2-4],因此,研究开发有效的创新型药剂,是防治棉花枯萎病殷切期望的。
为了有效防治棉花枯萎病,国内外很多学者进行了有效药剂的研发[3-6],新杀菌剂研发也有一些报道[7]。而在新化合物杀菌活性研究中,必须进行新化合物对棉花枯萎病菌室内毒力测定,但进行新化合物室内毒力测定的问题是相当多的化学合成的新化合物不溶于水,因此,毒力测定时,先要加入有机溶剂助溶。助溶的有机溶剂(简称:助溶剂),如果对棉花枯萎病菌没有杀菌作用,对实验结果就没有干扰,它作为助溶剂就是安全的;……
