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Subject: Chemistry × Author: Ramandeep Kaur × Start date: 2011 × Type: Thesis ×
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    ThesisItemOpen Access
    CHEMISTRY AND INSECTICIDAL POTENTIAL OF PARTHENIN AND ITS TRANSFORMATION REACTION PRODUCTS AGAINST Tribolium castaneum (Herbst).
    (PAU Ludhiana, 2012) Ramandeep Kaur; K. K., Chahal
    The present investigation deals with Chemistry and insecticidal potential of parthenin and its transformation reaction products against Tribolium castaneum (Herbst).The shade dried and powdered leaves of Parthenium hysterophorous were extracted in chloroform using Soxhlet extraction method. Parthenin was isolated by column chromatography using chloroform:acetone (5%) solution as the eluent. Parthenin was subjected to reaction with diazoester which resulted into the formation of two compoundspyrolysis product and diazoester adduct. Parthenin on reactions with dry hydrochloric acid gas and formic acid gets converted into anhydroparthenin. Parthenin on irradiation with microwave gets converted into anhydroparthenin. Parthenin and its derivatives were characterised on the basis of melting point, TLC, FT-IR and 1H NMR. Parthenin and its derivatives were tested for their bioefficacy against adults of Tribolium castaneum (Herbst) by releasing them in wheat grains spiked with various concentrations of test compounds viz. 1,000, 2,000, 4,000, 5,000, 10,000 and 20,000 μg g-1 of wheat respectively. The observations of mortality were noted every 24 hours till complete or constant mortality was obtained. The corrected per cent mortality was calculated using Abbott’s formula. All the compounds exhibited complete mortality at the spiking level of 10,000 and 20,000μg g-1. Parthenin was found to be most potent followed by anhydroparthenin, pyrolysis product and diazoester adduct.