ISOLATION AND IDENTIFICATION OF BIOLOGICALLY ACTIVE COMPOUNDS FROM THE WILD PLANT, SUADEA VERMICULATA AGAINST APHIS CRACCIVORA KOCH

Document Type : Original Article

Authors

1 Economic Entomology and pesticides Dept. Fac. of Agric. Cairo Univ.

2 Flavour and Aromatic Chemistry Dept., National Research Center, Cairo, Egypt.

3 Pests and Plant Protection Dept. National Research Center, Cairo, Egypt.

Abstract

Biological and phytochemical studies were conducted onSuadea vermiculata to investigate the biologically active compounds of this plant against Aphis caraccivora Koch. Results showed that, fraction C with LC50 0.081 mg/cm2 and LC95 0.226 mg/cm2 was the most effective compared with the crude extractLC50 0.104 mg/cm2 and LC951.338 mg/cm2 followed by fraction A (LC50 0.103 mg/cm2 and LC95 0.352 mg/cm2 ) and then fraction B which had the lowest LC95 value (0.709) than those of crude extract (1.338). Data also indicated that these fractions composed mainly of fatty acids, fatty acids methyl esters in addition to hydrocarbons. The main active component of fraction A, fatty acids methyl esters with percent area 70.698 % followed by 22.452 % monoterpenes, lenoleic acid with percent area 2.692 and low amount of hydrocabons with area percent 0.745. As regarding fraction B hydrocarbons represented the main components with percent area 56.425 %. The other compounds identified in this fraction were fatty acids 14.066 %, methyl anthranilate 15.706 % and methyl salicylate 7.650 %. Fraction C was the highest toxic fraction against A. craccivora, its chemical constituents were fatty acids methyl esters with 15.717 %, fatty acids 10.063 % and monoterpens 7.991 %. Methyl salicylate identified in this fraction with area percent 4.539 in addition to 15.470 % hydrocarbons.

Keywords

Journal of Plant Protection and Pathology
Volume 32, Issue 9
September 2007
Pages 7713-7722

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