.beta.-Haloethanephosphonates and thio derivatives thereof of formula, ##STR1## where X signifies chlorine or bromine, Y signifies oxygen or sulphur, and Z signifies a carboxylic acid ester or carbamoyl group, or an optionally further substituted methyl or ethyl group substituted by such a group, or signifies an acylmethyl, optionally aryl-substituted alkenyl or alkynyl, cyclic ether, e.g. tetrahydropyranyl, or optionally mono-substituted cyanomethyl group, or signifies an alkyl-, cyclo-alkyl- or aryl-thio, -sulphinyl or -sulphonyl group, or an optionally further substituted methyl or ethyl group substituted by such a group, or signifies a sulphonic acid ester group, or an optionally further substituted methyl or ethyl group substituted by such a group, Are useful as regulators of plant growth or plant secretion, especially as stimulators of latex flow in latex-forming plants.
.beta.-Haloethanephosphonates和其
硫代衍
生物的
化学式为##STR1## 其中X表示
氯或
溴,Y表示氧或
硫,Z表示
羧酸酯或
氨基甲酰基团,或者是一个可选的进一步取代的甲基或乙基基团,被这样的基团取代,或表示一个酰甲基,可选地芳基取代的烯烃基或炔基,
环醚,例如
四氢吡喃基,或者可选地单取代的
氰甲基基团,或表示一个烷基,环烷基或芳基
硫,-亚磺酰基或磺酰基团,或者一个可选的进一步取代的甲基或乙基基团,被这样的基团所取代,或表示一个
磺酸酯基团,或者一个可选的进一步取代的甲基或乙基基团,被这样的基团所取代。它们可用作植物生长或植物分泌的调节剂,特别是作为刺激乳液形成植物的乳液流动的刺激剂。