New 4-alkyl-gamma-lactone derivatives that stimulate plant growth and defense and have antifungal activity against pathogenic fungi

摘要

4-Alkyl-gamma-lactones (I) are new. 4-Alkyl-gamma-lactones of formula (I) are new: R1, R4 = H, alkyl, alkenyl, aralkyl or aralkenyl, provided that one is (CH2)nCH3; n = 0-19; R2, R3, R5, R6 = H, alkyl, alkenyl, aralkyl or aralkenyl. An Independent claim is also included for (I)-producing Trichoderma strains.