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EFFICACY OF LANTANA CAMARA ESSENTIAL OIL AND LEAF EXTRACTS AGAINST ALMOND MOTH, CADRA CAUTELLA (WALKER)

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Title EFFICACY OF LANTANA CAMARA ESSENTIAL OIL AND LEAF EXTRACTS AGAINST ALMOND MOTH, CADRA CAUTELLA (WALKER)
 
Creator BHEEMANNA. SOMANNA. GOTYAL
 
Contributor Chitra Srivastava
 
Subject extraction, biological phenomena, oils, essential oils, animal developmental stages, sowing, concentrates, eggs, toxicity, developmental stages
 
Description t-8042
Products based on plant extracts and phyto oils can be an alternative to the
conventional insecticides and fumigants. Lantana camara (Family: Verbenaceae), is a
well known medicinal plant. Information about its bioefficacy against insect pests is
very less.
Leaves of L. camara was subjected to extraction with methanol and hexane.
Extracts from leaves were further partitioned with solvents of varying polarity. Fresh
leaves of L. camara chopped and essential oil in pure form was collected through
hydro distillation. Thus the various extracts obtained LC-1, LC-2, LC-3, LC-4, LC-5
and azadiractin technical and essential oil were further evaluated for their bioefficacy.
Insecticidal activity was observed with film residue method against early and late
eggs, early, middle, late larvae and early, late adults. Observations were taken after 24
hrs. Seed protectant activities of these extracts were evaluated by mixing the extracts
with seeds at different five doses and releasing freshly hatched larvae. The efficacy of
extracts was evaluated with different fractions with different parameters like percent
weight loss, percent seed damage and percent adult emergence.
Fumigant activity of essential oil was evaluated against egg, larva and adult
stages at 6, 12, 24 and 48 hrs. exposure periods. Effect of different concentrations of
extract was also studied on percent germination, insecticidal, fumigant, seed
protectively and effects on germination of different extracts were compared.
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Insecticidal toxicity of various extracts of L. camara and azadirachtin against different
stages of C. cautella showed that toxicity of extract was dose dependent. Matured
eggs were more tolerant than young ones against LC-1, LC-2, LC-3 and LC-4
extracts. Extracts LC-3 and LC-4 showed lowest LC50 values against egg stage of C.
cautella were found to be more tolerant to eggs against all the extracts. Only extract
LC-3 was effective against larval stage of C. cautella respective of their age. Based on
lethal concentrations middle-aged larvae showed higher LC50 values compared to
early and late larvae. Old adults were found to be more susceptible against extracts.
Only LC-3 and LC-4 extracts were effective on adults.
Efficacy of extracts of L. camara on wheat seeds were studied to control
infestation of C. cautella and it was found that percent weight loss and seed damage
was reduced as the concentration was increased. Among the various extracts LC-4
showed maximum reduction in percentage weight loss. At higher doses of 2 and
5gm/kg. All extracts showed reduced percent seed damage but efficacy of extract LC-
4 showed significant low percent seed damage with doses, 0.5, 1.0, 1.5gm/kg. Adults’
emergence could not be observed with highest treatment concentration of all the
extracts. Extracts LC-3 and LC-4 showed reduced adult emergence even at lower
doses.
Fumigant activity of essential oil of L. camara against C. cautella showed that
mortality of larval and adult stage was dose dependent. Mortality of insects increased
as the exposure period of essential oil was increased. Essential of L. camara was
found to be most effective against adult stage compared to egg and larval stage.
Definite trend of age on toxicity of essential oil was not observed.
Germination of wheat seeds treated with various concentrations of different
extracts was not affected.
 
Date 2017-01-03T13:46:41Z
2017-01-03T13:46:41Z
2009
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94144
 
Format application/pdf