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Bio-intensive management of invasive eucalyptus gall wasp, Leptocybe invasa fisher & La Salle (Eulophidae: Hymenoptera)

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Title Bio-intensive management of invasive eucalyptus gall wasp, Leptocybe invasa fisher & La Salle (Eulophidae: Hymenoptera)
 
Creator C, Shivaraju
 
Contributor C. T, Ashok Kumar
 
Subject cloning, parasites, biological interaction, developmental stages, planting, diseases, biological phenomena, coppicing, insecticides, fruits
 
Description As many as seven species Viz., Grasshopper, Cyrtocanthacris tatarica, ash
weevil, Myllocerus discolor, psyllid, Psylla sp., thrips, Frankliniella occidentalis, aphid,
Aphis craccivora, termite, Odentotermis obesus and gall wasp Leptocybe invasa) and a
parasitoid (Megastigmus viggianii, were recorded on Eucalyptus during 2011-11.
Roving survey was conducted at 15 locations, which revealed the spread of L.
invasa in South Karnataka of which Hoskote and Mysore recorded highest and lowest
galls, with two peak periods of adult emergence during April and November. Gall wasp,
L. invasa completed five stages of development during its life cycle; the duration of I, II,
III, IV and V was 14.40, 47.30, 15.50 12.50 and 30.70days respectively. Food preference
to L. invasa (female and male) and its parasitoids (M. viggianii and Q. mendeli) revealed
maximum survival when fed with honey solution.
Fifteen eucalyptus clones/species were screened against L. invasa and grouped as
immune (four clone), tolerant (one), susceptible (four clones) and highly susceptible (six
clones). GCMS analysis showed twenty two volatile compounds in susceptible clone
IFGTB C19. Of which, two (α - Phellandrene and 1, 8 Cineole) and three compounds (α-
Phellandrene, Not Identified and 1, 8 Cineole) showed maximum response for antenna of
L. invasa and its parasitoid (Q. mendeli). Whereas, in resistant clone IFGTB C-69 none of
the compounds showed response.
Yellow sticky trap was found effective in trapping the adult wasps both for
monitoring and mass trapping. Gum with eucalyptus oil trapped maximum number of
wasps (192.33 and 149.68/trap) followed by gum without oil, petroleum jelly (with or
without eucalyptus oil) and automobile grease (with or without eucalyptus oil) in nursery
and coppice. Parasitization by local parasitoid, M. viggianii on L. invasa was low
(31.82%) in field. Maximum emergence and per cent parasitization of Q. mendeli was
recorded from stage B (II stage) followed by group C (III stage) and D (IV stage). While,
local parasitoid, M. viggianii was maximum in group C (III stage).
Among new insecticide molecules per cent reduction of gall in nursery was
maximum in carbofuran 3G @ 1 g/plant + imidacloprid @ 0.008% followed by
carbofuran 3G @ 1 g/plant + thiamethoxam @ 0.0125%, imidacloprid @ 0.008%, after
first and second spray in nursery and coppice.; similarly lowest mean per cent reduction
of gall number was in profenophos.
 
Date 2016-05-18T09:47:41Z
2016-05-18T09:47:41Z
2012-08-29
 
Type Thesis
 
Identifier Th-10351
http://krishikosh.egranth.ac.in/handle/1/66048
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru