Thumbnail Image

Thesis

Browse

20122
Reset filters
Author: Ramandeep Kaur × End date: 2012 × Start date: 2012 ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    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.
  • Thumbnail Image
    ThesisItemOpen Access
    EVALUATION OF EUCALYPTUS AND CITRONELLA OILS AS REPELLENTS AGAINST HOUSE RAT, Rattus rattus (Linnaeus)
    (PAU Ludhiana, 2012) Ramandeep Kaur; Neena, Singla
    Experiments were conducted in laboratory pens, maze and store houses using two essential oils namely eucalyptus and citronella oils to study their repellency against house rat, Rattus rattus. In laboratory pens, both oils were applied as paint, as encapsulated wax blocks and as spray each further with three modes of application i.e. daily, once a week, and alternatively in a week at three concentrations 5, 10 and 20%. Repellent effect of the two oils was observed at all the concentrations tested but significantly (P ≤ 0.05) higher effect of eucalyptus oil was in female rats at 20% concentration and of citronella oil in male rats at 10% concentration when applied as spray alternatively. Multichoice experiment conducted in T-maze using 5% eucalyptus and citronella oils as encapsulated wax blocks in choice with no treatment revealed significantly (P ≤ 0.05) higher repellent effect of eucalyptus oil compared to citronella oil in female rats. Bichoice experiment conducted in I-maze using 5% eucalyptus oil as encapsulated wax blocks in choice with no treatment showed significantly (P ≤ 0.05) reduced movements and activities of both male and female rats in treated zone compared to untreated zone. In store house experiments conducted using 5% eucalyptus and citronella oils as encapsulated wax blocks and as spray revealed more percent repellency and control success with eucalyptus oil as encapsulated wax blocks. Present studies thus reveal the efficacy of 5% eucalyptus oil encapsulated in wax blocks as repellent against R. rattus of both sexes.