CONTROL OF THE EGYPTIAN cortes LEAFWORM Spodoptera iittoretis (80150,) BY USE OF FORMULATED BACTERIA.

Document Type : Original Article

Authors

1 Plant Protection Department, Facully of Agrlculturo • Aln Shams lJniversity, ShoubraEI- Khelma, Cairo, Egypt

2 Genetics Department, Faculty of Agriculture, Ain Shams University, Snoubra EI. Kheima, Cairo, Egypt

Abstract

The efficacy of two pathogenic bacteria Bacillus /huring/Msis var. kurslaki
HD129 and Serratia marcescens were avaluated on 3~ end 5'" larval inslars of
Sp < /em>coop < /em>ter» liftoral/s. These bacterial products were Isolated bylhe Aln Shams Canter
of Genetic Engineering and 8kltechnok)gy.The cornmerctat product Becutus
thuringiensls var. kurslaki "Protecto" was considered as a standard for cornpanson.
Allhough, both two t estec b aelerl al i s olates h ad a high L eM) than the commercIal
product Protecto, both exhibited highsr accumulative mortality. This eff~t was more
apparent for Serratia mercescens than HD129 1.0. 66.5% and 62% respectively (or
treatment of 3,d instar. F urthe<more, the lime required to kill 50% of Insects (L T~) was
the lowest when Serratia nrarcescens was tested, It was <I days lor both larval tnstars
treated. Meanwnile, this period was 5 and 8 days lor 3'" and s" Inslar larvae treated
with HD 129 and it averaged 7 days (or both treated Instars when Pro tecto was used
Percontage of malformation was higher and number of larvae pupation was lower
when the two tested bacterial isolates were testec Ihan commercial pl"oduct.
Journal of Plant Protection and Pathology
Volume 29, Issue 4
April 2004
Pages 2077-2086

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