FIELD: organic chemistry and technology. SUBSTANCE: product: derivative of tetrahydrofuran of the formula: 
(I) where: X1 and X2 - are similar or different and mean H, halogen, O-(C1-C4)-alkyl, hydroxy-group, -S-(C1-C4)-alkyl, acyl substituted with halogen, di-((C1-C4)-alkyl)-amino, (C1-C4)-alkoxyimino; A - phenyl substituted with two halogen atoms; (C1-C4) - hydrogen. Method of struggle against fungi involves plant treatment with compound of the formula (I) as isomer at m. p. 96 C or equimolar mixture of isomers taken at amount 0.11-1 kg/ha. Synthesized compounds were used as fungicides. EFFECT: improved method of synthesis, enhanced effectiveness. 4 cl, 3 tbl
