eprintid: 4340
rev_number: 12
eprint_status: archive
userid: 14
dir: disk0/00/00/43/40
datestamp: 2011-12-11 11:35:02
lastmod: 2011-12-11 11:35:02
status_changed: 2011-12-11 11:35:02
type: conference_item
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Sharma, H C
creators_name: Leuschner, K
creators_name: Sankaram, A V B
creators_name: Gunasekhar, D
creators_name: Marthandamurthi, M
creators_name: Bhaskaraiah, K
creators_name: Subrahmanyam, M
creators_name: Sultana, N
icrisatcreators_name: Sharma, H C
icrisatcreators_name: Leuschner, K
affiliation: ICRISAT(Patancheru)
affiliation: Regional Research Laboratory
country: India
title: Insect Antifeedants And Growth Inhibitors From Azadirachta Indica And Plumbago Zeylanica
ispublished: pub
subjects: s2.4
subjects: s2.7
full_text_status: public
pres_type: paper
note: This constitutes conference paper No. 149, from the International Crops Research
lnst~tute for the Semi-Arid Tropics (ICRISAT), Patancheru, 502 324, A.P.,
India.
The authors are grateful to Mr. V. Venkateswara Rao for his help in the bioassay
experiments; Dr. K. Kannan and Mr. R.E.C. Johnson (Centre for Cellulare and
Molecular Biology, Hyderabad) for their help in the high performance llquid chromatographic
studies; Mr. N. Sivasankara Reddy (Bharat Heavy Electricals Limited,
Research and Development, R & D. Hyderabad) for the 'H NMR specirum
of vepaol; Prof. T.R. Govindacharl (22 Crescent Street, T. Nagar, Madras) and
Dr. J.D. Warthen, Jr. (Agricultural Environmental Quality Institute, Beltsville;
MD, U.5.A) for the samples of atadirachtin; and Dr. C. Thyagarajan, Dr. P.B.
Sattur (Regional Research Laboratory, Hyderabad), Dr. L.R. House and Dr. J.S.
Kanwar (ICRISAT, Hyderabad) for the~re ncouragement and keen interest in these
investigations.
abstract: Solvent extracts of dlfferent parts of the neem tree (Azadlrachta lndica A. 3uss)
were bioassayed for thelr antlfeedant properties agalnst flrst- and thlrd-instar
larvae of Mythimna reparata. Fraction 'C', obtalned from an ethanollc extract of
the shade-drled neem seeds (Hyderabad, India) was the most effective phagodeterrent
under glasshouse, laboratory and, to a 11mlted extent, fleld conditions.
Fractlon 'C' was further purlfled to fractlon 'M', whlch was subjected to column
chromatography (silica gel) result~ng In IG fractions, AI-l to AI-14. Fractions
AI-9, AI-10 and AI-11 were found to be b~olog~calalyc tive, reduclng leaf feedlng
and larval weight consrderably. None of the treated larvae whlch fed on leaf
dlscs treated wlth the fractions and extracts 'C' and 'M' could pupate. The retentlon
tlme of the malor component of AI-10 on a p BONDAPAK C18 10 u, 3.9
mm ID, 30 cm column (hlgh performance liquid chromatography) was close to
that of azadlrachtln. Spectral lnvestlgatlons revealed that this major component
of A1 1s dlfferent from the antifeedants reported earher from A, indica and Melia
azedarach. It has been des~gnated as vepaol (the Telugu name for neem IS vepa),
and some aspects of 11s structure are discussed. Studles relatlng to the effectiveness
of fraction 'G' on the oriental rmyworm, Mythrmna reparata, and other sorghum pests are presented.
date: 1983
date_type: published
pagerange: 1-30
event_title: Natural Pesticides from Neem Tree and other Tropical Plants Proceeding of the 2nd International Neem Conference
event_location: GTZ. Eschborn
event_dates: 1986
event_type: conference
refereed: TRUE
related_url_url: http://scholar.google.co.in/scholar?as_q=Insect+Antifeedants+And+Growth+Inhibitors+From+Azadirachta+Indica+And+Plumbago+Zeylanica&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as_sdt=1.&as_sdtp
related_url_type: author
citation:   Sharma, H C and Leuschner, K and Sankaram, A V B and Gunasekhar, D and Marthandamurthi, M and Bhaskaraiah, K and Subrahmanyam, M and Sultana, N  (1983) Insect Antifeedants And Growth Inhibitors From Azadirachta Indica And Plumbago Zeylanica.  In: Natural Pesticides from Neem Tree and other Tropical Plants Proceeding of the 2nd International Neem Conference, 1986, GTZ. Eschborn.     
document_url: http://oar.icrisat.org/4340/1/CP-149.pdf