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Synthesis and Antifeedant Activities of Rosin-Based Esters Against Armyworm

[ Vol. 19 , Issue. 3 ]

Author(s):

Liu Li, Yan Xinyan, Gao Yanqing and Rao Xiao-Ping   Pages 193 - 199 ( 7 )

Abstract:


A series of rosin based esters have been synthesized from dehydroabietic acid and maleopimaric acid, respectively. Their structures were confirmed by FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR and single crystal X-ray diffraction. Their antifeedant activities against armyworm were examined by leaf plate method. Methyl ester of dehydroabietic acid and maleopimaric acid were crystallized in orthorhombic system with cell dimensions of a = 26.352 [5] Å, b = 6.1020 [12] Å, c = 11.812 [2] Å and a = 7.9216 [11] Å, b = 11.9912 [16] Å, c = 23.425 [3] Å, respectively. They contained classic tricyclic hydrophenanthrene skeleton. The antifeedant results indicated that most rosin-based esters exhibited significant antifeedant activities at a concentration of 0.01 g mL<sup>-1</sup>. Their feeding deterrence values were above 70% after 24h. The antifeedant activities for rosin-based esters increased with the growth of chain length of alcohol except (Ia). </p> <p> Some armyworm were found dead during the antifeedant activity test, by which we speculated that these synthetic rosinbased esters had stomach poison activities against armyworm.

Keywords:

Rosin, esters, single crystal, antifeedant activity, armyworm.

Affiliation:

, , , Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory For Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Jiangsu, Nanjing 210042, China.



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