ssp Genes and spore osmotolerance in Bacillus thuringiensis israelensis and Bacillus sphaericus

1995 ◽  
Vol 31 (4) ◽  
pp. 228-233 ◽  
Author(s):  
Adriana Cucchi ◽  
Carmen Sanchez de Rivas
Keyword(s):  
Bacillus Thuringiensis ◽  
Bacillus Sphaericus ◽  
Bacillus Thuringiensis Israelensis

Control of Mosquitoes in Catch Basins in Connecticut With Bacillus thuringiensis israelensis, Bacillus sphaericus, and Spinosad

2011 ◽  
Vol 27 (1) ◽  
pp. 45-55 ◽  
Author(s):  
John F. Anderson ◽  
Francis J. Ferrandino ◽  
Douglas W. Dingman ◽  
Andrew J. Main ◽  
Theodore G. Andreadis ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Bacillus Sphaericus ◽  
Bacillus Thuringiensis Israelensis ◽  
Catch Basins

scholarly journals Eficiência e Persistência de Três Produtos Comerciais à Base de Bacillus thuringiensis israelensis e Bacillus sphaericus no controle de Culicidae (Diptera) em Lagoas de Tratamento de Efluentes

2010 ◽  
Vol 3 (3) ◽  
pp. 85-88
Author(s):  
Jose Lopes ◽  
Fernando Pereira dos Santos ◽  
João Antonio Cyrino Zequi ◽  
Denise Miguel Petroni
Keyword(s):  
Bacillus Thuringiensis ◽  
Culex Quinquefasciatus ◽  
Bacillus Sphaericus ◽  
Pathogen Transmission ◽  
Effluent Treatment ◽  
Alternative Methods ◽  
Liquid Formulation ◽  
Bacillus Thuringiensis Israelensis ◽  
Commercial Products ◽  
Culex Nigripalpus

Resumo. A ação hematofágica exercida por fêmeas de algumas espécies de Culicidae sobre o homem e outros animais pode estar diretamente relacionada à transmissão de patógenos, além de provocar reações alérgicas e causar incômodo. O aparecimento de populações resistentes aos inseticidas químicos impulsiona o uso de métodos de controle alternativos, principalmente o biológico. Objetivando testar a eficiência e persistência de produtos comerciais com principio ativo a base de Bacillus thuringiensis israelensis Berliner e Bacillus sphaericus Neide foram realizados experimentos em três lagoas de tratamento de efluentes, sobre larvas de Culicidae. Testou-se Vectolex (formulação granulada de B. sphaericus), Sphaericus (Formulação líquida de B. sphaericus) e Bt-horus (formulação líquida de B. thuringiensis). As aplicações foram realizadas quinzenalmente com avaliações realizadas a 0, 24, 48, 72 e 120 horas após a aplicação. As lagoas estavam colonizadas por Culex nigripalpus Theobald (1,5%), Culex saltanensis Dyar (2,25%) e Culex quinquefasciatus Say (96,25%). Com o produto Bt horus, registrou-se redução larval de 89,06%, 83,97% e 89,96% respectivamente a 24, 48 e 72 horas após a aplicação. Nos produtos contendo B. sphaericus, respectivamente na formulação granulada e líquida observou-se uma redução de 98,89 % e 98,34%, após 24 horas da aplicação e de 99,79% e 99,78% após 48 horas. Os produtos e as diferentes formulações foram eficientes no controle de larvas das três espécies de culicídeos em lagoas com grande quantidade de matéria orgânica, porém a persistência verificada foi de dois e três dias para produtos contendo respectivamente B. sphaericus e B. thuringiensis israelensis. Efficiency and Persistence of Three Commercial Products Based on Bacillus thuringiensis israelensis and Bacillus sphaericus in Controlling Culicidae (Diptera) in Effluent Treatment Lagoons Abstract. The hematofagic effect caused by females belonging to some species of Culicidae on humans and animals can be directly related to pathogen transmission, allergic reactions and uneasiness. The emergence of populations resistant to chemical insecticides has fostered the use of alternative methods, mainly biological control. The trials were conducted in three effluent treatment lagoons, on larvae of Culicidae to test the efficiency and persistence of commercial products whose active principles are based on Bacillus thuringiensis israelensis Berliner and Bacillus sphaericus Neide. The products tested were Vectolex (a granulated formulation of B. sphaericus), Sphaericus (a liquid formulation of B. sphaericus) and Bt-horus (a liquid formulation of B. thuringiensis). The products were applied biweekly and evaluations were conducted 0, 24, 48, 72, and 120 hours after each application. The lagoons were colonized by Culex nigripalpus Theobald (1.5%), Culex saltanensis Dyar (2.25%), and Culex quinquefasciatus Say (96.25%). Bt-horus reduced larvae by 89.06%, 83.97% and 89.96% at 24, 48 and 72 hours after product application, respectively. The granulated and the liquid formulations containing B. sphaericus reduced larvae by 98.89 % and 98.34% 24 hours after application, and by 99.79% and 99.78% after 48 hours, respectively. The products and the different formulations were effective in controlling larvae of all three Culicidae species in lagoons with high levels of organic matter, but the persistence was recorded in two and three days for products containing respectively B. sphaericus and B. thuringiensis israelensis.

scholarly journals Environment friendly management of mosquito: a short review

2018 ◽  
Vol 53 (3) ◽  
pp. 169-178 ◽  
Author(s):  
MA Riaz ◽  
A Riaz ◽  
B Ijaz ◽  
MS Rasool ◽  
S Rahat ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Vector Control ◽  
Bacillus Sphaericus ◽  
Control Measures ◽  
Bacillus Thuringiensis Israelensis ◽  
Dragonfly Nymph ◽  
Larvivorous Fish ◽  
Vector Borne ◽  
The Subject ◽  
And Control

Despite the large scale use of insecticides, capacity building, municipality, community and metropolis awareness, and preventive measures to counter vector borne diseases which are mounting day-by-day, new tools are now been introducing to prevent the spread of mosquito transmitted diseases. The low efficacy status of chemical pesticides have lead to the interest of researchers in search of fresh and even more practicable vector control methodologies to be applied. In this regards, multiple alternatives have been monitoring to develop control practice measures for the eradication, observation and control of mosquitoes at larval level by the use of a sustainable biological monitoring and control by an ordinary constructive predator, to exercise monitoring and practical control measures over parasites at larval stages in environmental and eco-friendly techniques. In particular, bio-control measures to monitor and control practical practices, context predatory larvivorous fish, dragonfly nymph, frogs, copepods, turtle, Entomopathogenic bacillus, Bacillus sphaericus and Bacillus thuringiensis israelensis are beings tried in different regions of world. The available research on the subject recommends that there exist multiple direct and indirect growth factors that could play a dynamic role in prey and predator’s survival. Species controphic that have an impact on concerned eco-relation reflect significant effect. In addition to this, certain eco-relations represent positive stimuli for the control of vector borne viral diseases. As a bio-control achieving feasible agent for vector monitoring, pointing, management and control predatory larvivorous fish, dragonfly nymph, frogs, copepods, turtle, Entomopathogenic bacillus, Bacillus sphaericus and Bacillus thuringiensis israelensis are not only considered as a liberated intervention for disease vector control of practices and mechanical control cost deterrents as well. Further research has been suggested on the subject so as to find out even more practicable and effective mosquito monitoring and practical control practices.Bangladesh J. Sci. Ind. Res.53(3), 169-178, 2018

A COMPARISON OF LABORATORY AND FIELD TESTS OF BACILLUS SPHAERICUS STRAIN 1593 AND BACILLUS THURINGIENSIS VAR. ISRAELENSIS AGAINST AEDES STIMULASS LARVAE (DIPTERA: CULICIDAE)

1982 ◽  
Vol 114 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Stephen P. Wraight ◽  
Daniel Molloy ◽  
Patricia McCoy
Keyword(s):  
Bacillus Thuringiensis ◽  
Entire Range ◽  
Field Tests ◽  
Bacillus Sphaericus ◽  
Toxic Material ◽  
Mean Temperature

AbstractBacillus thuringiensis var. israelensis (serotype H-14) and B. sphaericus strain 1593 were tested against Aedes stimulons larvae in the laboratory and in 38-cm-diam, open-ended cylinders embedded in the bottom detritus of a woodland pool. Estimates of LC50 were lower against fourth instars in the field at a mean temperature of 15.9 °C than in the laboratory at 21.1 °C. The greater efficacy in the field was attributed to high daytime water temperatures (mean 20.5 °C) following treatment and exposure of the larvae to substantially greater amounts of toxic material in a larger volume of water than in the laboratory. The regression of probit on log10 concentration was not linear over the entire range of mortality caused by B. sphaericus, increasing the difficulty of estimation of LC values. Bacillus sphaericus was significantly less active than B. thuringiensis.

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