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Studies on insecticidal properties of datura metel against plutella xylostella (Linnaeus) and earias vittella (Fabricius)

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Title Studies on insecticidal properties of datura metel against plutella xylostella (Linnaeus) and earias vittella (Fabricius)
 
Creator Neel Jayantha Liyanage
 
Contributor Chauhan, R.
 
Subject Datura metel, Plutella xylostella, Earias vittella and insecticidal properties
 
Description Leaf extract of Datura metel in methanol and subsequent fractions in
acetone, chloroform and hexane were evaluated under laboratory conditions
against Plutella xylostella (Linnaeus) and E. vittella (Fabricius) at CCS
Haryana Agricultural University, Hisar. Treatments included 2.5, 5.0, 7.5, 10
per cent concentrations of methanol extract and 0.5, 1.0, 1.5, 2.0 per cent
concentrations of fractions alongwith control as water and acetone. In contact
toxicity experiment, methanol extract (10.0%) caused maximum larval
mortality of P. xylostella (63.34 - 83.34%) and E. vittella (66.67 - 86.67) after 4
and 8 h exposure. Under biological studies on first instar larval treatment of
P. xylostella, 10 per cent methanol extract and 2 per cent hexane fraction
significantly affected larval survival (37.78 - 47.78%), larval period (12.34
-14.67 days), percent pupation (22.23 - 38.87%), adult emergence (0.0 -
21.12%) and oviposition. Similar effects were recorded with 10 per cent
methanol extract and 2 per cent chloroform fraction for E. vittella.
Consumption and utilization indices were also adversely affected in all
treatments as compared to control for both the insects. Methanol extract
exhibited higher feeding deterrence for larvae of P. xylostella (60.40 - 80.89%)
and E. vittella (30.27 - 64.24%) as compared to different fractions of extract.
Adults fed on sucrose diet containing extract (2.5 – 10.0%) and fractions (0.5 - 2.0%) laid significantly fewer eggs with poor hatching. Under choice
condition, the adults of both insects preferred to lay a greater number of eggs
on the untreated portion of oviposition substrate compared to extract and
fractions treated portion. Eggs laid on treated oviposition substrates also
exhibited reduced hatching. When the eggs were dipped for 5 seconds in
different concentrations of methanol extract and its fractions, minimum egg
hatching 26.67 per cent (P. xylostella) and 30.83 per cent (E. vittella) were
recorded in methanol 10.0 per cent which differed significantly from that of
fractions.
 
Date 2016-11-30T11:49:04Z
2016-11-30T11:49:04Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/88346
 
Language en
 
Format application/pdf
 
Publisher CCSHAU