FIELD: organic chemistry. SUBSTANCE: product: triazole derivative of the general formula (I): 
where R1 - lower alkyl; R2 and R3 - halogen independently; X - chlorine at 2- or 6-position. Invention proposes an aphicide agent based on triazole derivative of the general formula (I) and methods of synthesis of triazole derivative of the general formula (I) by means of: a) interaction of compound of the general formula (II): 
with hydrazine R1-NHNH2 or b) interaction of compound of the general formula (III) 
with benzonitrile derivative of the formula: 
in the presence of Lewis acid, or c) interaction of compound of the general formula (IV) 
with compound of the formula: 
. The synthesized compounds were used in agriculture. EFFECT: improved method of synthesis. 7 cl, 5 tbl
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