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Effectiveness of a local strain of Bacillus thuringiensis in the management of castor semilooper, Achaea jaizata on castor (Ricizus communis)

Indian Agricultural Research Journals

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Title Effectiveness of a local strain of Bacillus thuringiensis in the management of castor semilooper, Achaea jaizata on castor (Ricizus communis)
 
Creator DEVI, P S VIMLA
SUDHAKAR, R
 
Subject Bacillus thuringiensis; Local isolate; Potency; Castor semilooper
 
Description Formulation of a local strain of Bacillus thuringiensis ( B r ) var. kttrstaki, viz DOR Bt- I . obtained through multiplication on a wheat bran based solid substrate was tested against castor semilooper field. Field trials showed that a single spray of the formulation at the dose of 1.5 g / litre gave ef'kctive control of castor semi looper till 30 days atier spraying. Incedence of the larval parasitoid (micropilitis maculipennis was observed only in Bt sprayed fields. Continuous egg laying and high larval incidence necessitated five sprays in tlie cluinalphos sprayed fields at 6-7 days intervals. Iticremcntal cost:benefit ratlo for thc Br spray was found to be 3.85 while it was 1.62 for quinalphos.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-01-08
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3016
 
Source The Indian Journal of Agricultural Sciences; Vol 76, No 7 (2006)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3016/1087
 
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