Keywords: Acetylene, hydrochlorides, acetylene amino alcohols, ammonium salts, pesticides, inhibitors Introduction

For determination of the biological activity of synthesized preparates the known method –bio testing on wheat was used [7,8]. Preparates were used as their water solutions with concentrations 1000; 100 and 1 mkg/3ml and tests were carried out three times. Seeds have been sprout during 36 h at 25-26⁰C and then growth of coleoptiles was determined. Results of determination of biological activity of investigated preparates are presented in table 1, from which it is shown that compounds I, III, V and XIII have possesed by inhibition activity; compounds XII and XXII- by stimulation activity and compounds VII-XI, XIV-XVIII, XX, XXIII – are low active. Also it was shown that substances II, IV, VI, XIX, XXI and XXIV in high concentration (1000mg/3ml) are inhibitors of plants growth but at low concentrations (100 and 1 mkg/3ml) have stimulated growth of wheat coleoptiles.

Also influence of some most active compounds on the seeds germination and growth of different types of culture plants: wheat of sort Albidum-43 (Triticum durum), Orange-160 sorghum (Sorghum durra) and chickpeas -173 (Cicer dricti num) in preplant or preemergence periodwas investigated. It is known [10-12] that in preplant period there are two methods of seed treatment: 1) weting of them in water solutions of used investigated compounds or 2) introduction of them in composition of the shell-forming covers.