三种新杀菌剂防治黄瓜霜霉病的研究

经1985—1986两年的试验研究,结果表明,20%硫代磷酰胺酯的防治效果为89.06%～89.81%;50%C—Ho—Cu500和Bo—10(生物农药)的防治效果在85%以上。20%硫代磷酰胺酯具有内吸传导、杀菌力强、且比对照减少病斑数目达61.77%～64.74%等特点。50%C—Ho—Cu500和Bo—10也是良好的保护剂。

Zn/I_2促进的S—S键断裂用于合成α-硫代酯和α-硫代腈

二硫醚在二甲基甲酰胺（DMF）中被Zn/I2还原,发生S—S键的断裂,生成硫负离子,随后与α-溴乙酸乙酯或α-溴乙腈反应,分别生成α-硫代酯和α-硫代腈,产率为79%-91%.

Synthesis and properties of pyrethroids containing phosphorous β-substituted(thio)phosphonyl vinyl cyclopropane carboxylic ester

This paper presents nine novel pyrethroids containing phosphorous and five new phos- phorous ylids.A new synthetic route of β-substituted vinyl(thio)phosphonate having E configura- tion have been developed.The compound li exhibited moderate insecticidal activities against Culex mosquitoes and Army worm.