scholarly journals Lethal effects of a Mexican Beauveria bassiana (Balsamo) strain against Meccus pallidipennis (Stal)

2014 ◽  
Vol 45 (2) ◽  
pp. 551-557 ◽  
Author(s):  
Zumaquero Rios José Lino ◽  
López-Tlacomulco José Juventino ◽  
Rojas García Raúl ◽  
Sansinenea Estibaliz
Keyword(s):  
Beauveria Bassiana ◽  
Lethal Effects ◽  
Meccus Pallidipennis

scholarly journals Dysbacteriosis of the Intestinal Flora Is an Important Reason for the Death of Adult House Flies Caused by Beauveria bassiana

2021 ◽  
Vol 11 ◽  
Author(s):  
Ruiling Zhang ◽  
Shuo Feng ◽  
Xiaochen Xie ◽  
Zhendong Huang ◽  
Qing Wan ◽  
...  
Keyword(s):  
Biological Control ◽  
Beauveria Bassiana ◽  
Intestinal Flora ◽  
House Fly ◽  
Negative Interaction ◽  
Lethal Effects ◽  
House Flies ◽  
Virulence Marker ◽  
Insect Pathogens

Beauveria bassiana is one of the most widespread insect pathogens and can be used in the biological control of agricultural, forestry and medical pests. The mechanisms by which B. bassiana leads to mortality in different host insects are also different. For house flies, B. bassiana has strong virulence, but its microecological mechanism is not clear. In this paper, the virulence of three strains of B. bassiana (TB, CB and BB) isolated from different hosts to house flies was studied. The results showed that the three strains of B. bassiana had strong pathogenicity to house fly adults. Specifically, TB was the strongest, CB was the second strongest, and BB was the weakest, with maximum lethal effects on house fly populations 5, 6, and 7 days after infection, respectively. Further study showed that the intestinal flora of house flies was disordered 3, 4, and 5 days after B. bassiana TB, CB and BB strain infection, respectively. Intestinal flora dysbacteriosis may be an important reason for the death of house flies caused by B. bassiana. After infection, the negative interaction ratio of bacteria in the house fly intestine decreased, and the stronger the virulence was, the lower the negative interaction ratio was. The time from B. bassiana infection to intestinal flora dysbacteriosis was not fixed. We named this period the “spring stage”. The stronger the virulence of the B. bassiana strain was, the shorter the “spring stage” was. Therefore, the “spring stage” can be used as a virulence marker for evaluating the pathogenicity of different B. bassiana strains.

Actividad de dos hongos entomopatógenos, identificados molecularmente, sobre Bactericera cockerelli

2017 ◽  
Vol 43 (1) ◽  
pp. 27 ◽  
Author(s):  
Fabiola Villegas-Rodríguez ◽  
Ovidio Díaz-Gómez ◽  
J. Sergio Casas-Flores ◽  
Clara Teresa Monreal-Vargas ◽  
Fernando Tamayo-Mejía ◽  
...  
Keyword(s):  
Beauveria Bassiana ◽  
Bactericera Cockerelli ◽  
Candidatus Liberibacter

El psílido de la papa Bactericera cockerelli afecta a las solanáceas en México, por el daño directo que causa, además, de que es transmisor de patógenos procariotes como Candidatus Liberibacter solanacerum (psyllaurous). Este insecto es combatido principalmente con productos químicos. Sin embargo, en la actualidad, se buscan nuevas estrategias para su manejo como el uso de hongos entomopatógenos. El objetivo de este trabajo fue evaluar la susceptibilidad del psílido de la papa a dos cepas comerciales y dos nativas de Metarizhium anisopliae y Beauveria bassiana, así como confirmar la identificación de las mismas mediante técnicas moleculares. Los bioensayos se realizaron con la cepa nativa MA25 de M. anisopliae y las comerciales Metabich® (MA28) y Bassianil® (BB09) y la nativa BB42 de Be. bassiana. Se probaron cinco concentraciones sobre ninfas del tercer estadio de B. cockerelli y se obtuvieron sus CL50 y CL95. Todas las cepas resultaron patógenas para el psílido de la papa, las más tóxicas fueron BB09, BB42 y MA28. La mortalidad fluctuó entre 90 a 100% con las concentraciones más altas de cada cepa: la más virulenta fue BB09, con una CL50 de 2,99 x 104 conidias mL-1 y MA25 la menos virulenta tuvo una CL50 de 6,34 x 105 conidias ml-1. Mediante la clonación y la secuenciación de la región ITS de los rADN 18S, se corroboró que las cepas nativas identificadas por morfología microscópica y claves taxonómicas corresponden a Be. bassiana y M. anisopliae.

Beauveria bassiana xylanase: a biomass degrading enzyme from an entomopathogen

2020 ◽  
Author(s):  
Santhosh Pillai ◽  
AYODEJI EMMANUEL AMOBONYE ◽  
Prashant Bhagwat
Keyword(s):  
Beauveria Bassiana ◽  
Degrading Enzyme

Evaluación de hongos entomopatógenos para el control biológico del mosquito Culex quinquefasciatus

2009 ◽  
Vol 5 (9) ◽  
pp. 25-38
Author(s):  
Martha Giselle Rivera Pineda ◽  
Sandra Patricia Garzón Lozano ◽  
Luz Inés Villarreal Salazar
Keyword(s):  
Beauveria Bassiana ◽  
Culex Quinquefasciatus ◽  
Metarhizium Anisopliae

En busca de una alternativa de control del mosquito Culex quinquefasciatus en áreas urbanas se desarrolló el proyecto: “Evaluación de microorganismos biocontroladores sobre el mosquito Culex quinquefasciatus” cuyo objetivo fue evaluar la capacidad biocontroladora de diferentes hongos entomopatógenos sobre larvas del mosquito a nivel de laboratorio. Se evaluaron 16 aislamientos de hongos en diferentes concentraciones. Se constataron diferencias en el porcentaje de mortalidad producido en larvas de Cx. quinquefasciatus dependientes del tipo de aislamiento, de la concentración utilizada y del tiempo de exposición. Los aislamientos que presentaron el nivel de mortalidad más alto pertenecen a la especie Metarhizium anisopliae, seguidos por aislamientos de la especie Beauveria bassiana. El aislamiento que presentó el mayor nivel de mortalidad (100%) en menor tiempo de exposición (24 horas) fue Metarhizium anisopliae 99068 en una concentración de 1x106 e/ml. Por lo tanto este aislamiento es recomendado para su evaluación en campo y desarrollo de un producto comercial.

PATOGENICIDAD DE Beauveria bassiana (Bals) Vuill., SOBRE EL GUSANO DEFOLIADOR DEL MARACUYÁ Dione juno (Cramer) (Lepidoptera: Nymphalidae) EN LABORATORIO

2013 ◽  
Vol 12 (1-2) ◽  
pp. 75 ◽  
Author(s):  
Jenny Malpartida-Zevallos ◽  
Mónica Narrea-Cango ◽  
William Dale-Larraburre
Keyword(s):  
Beauveria Bassiana

A New Fluorescent Salen-uranyl Sensor for the Sub-ppm Detection of Chemical Warfare Agents

2020 ◽  
Vol 24 (20) ◽  
pp. 2378-2382
Author(s):  
Andrea Pappalardo ◽  
Chiara M.A. Gangemi ◽  
Rosa Maria Toscano ◽  
Giuseppe Trusso Sfrazzetto
Keyword(s):  
Real Time ◽  
Fluorescent Sensor ◽  
Chemical Warfare Agents ◽  
Optical Response ◽  
Chemical Warfare ◽  
Lethal Effects ◽  
Strong Affinity ◽  
Chemical Attack ◽  
Fluorescence Measurements ◽  
Warfare Agents

Real-time sensing of Chemical Warfare Agents (CWAs) is today a crucial topic to prevent the lethal effects of a terroristic chemical attack. For this reason, the development of efficient, selective, sensitive and reversible sensoristic devices, able to detect by optical response ppm levels of these compounds, is strongly required. Here, the synthesis of a new fluorescent sensor based on a salen-uranyl scaffold, functionalized with two bodipy moieties, and its application for the detection of sub-ppm levels of CWAs is reported. Detection properties were evaluated by fluorescence measurements and selectivity tests demonstrated the strong affinity for CWAs.

Understanding gas bubble trauma in an era of hydropower expansion: how do fish compensate at depth?

2020 ◽  
Vol 77 (3) ◽  
pp. 556-563 ◽  
Author(s):  
Naomi K. Pleizier ◽  
Charlotte Nelson ◽  
Steven J. Cooke ◽  
Colin J. Brauner
Keyword(s):  
Bubble Growth ◽  
Gas Bubble ◽  
Hydroelectric Dams ◽  
Dissolved Gas ◽  
Empirical Relationships ◽  
Lethal Effects ◽  
Exposed Fish ◽  
Total Dissolved Gas ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
The Relationship

Hydrostatic pressure is known to protect fish from damage by total dissolved gas (TDG) supersaturation, but empirical relationships are lacking. In this study we demonstrate the relationship between depth, TDG, and gas bubble trauma (GBT). Hydroelectric dams generate TDG supersaturation that causes bubble growth in the tissues of aquatic animals, resulting in sublethal and lethal effects. We exposed fish to 100%, 115%, 120%, and 130% TDG at 16 and 63 cm of depth and recorded time to 50% loss of equilibrium and sublethal symptoms. Our linear model of the log-transformed time to 50% LOE (R2 = 0.94) was improved by including depth. Based on our model, a depth of 47 cm compensated for the effects of 4.1% (±1.3% SE) TDG supersaturation. Our experiment reveals that once the surface threshold for GBT from TDG supersaturation is known, depth protects rainbow trout (Oncorhynchus mykiss) from GBT by 9.7% TDG supersaturation per metre depth. Our results can be used to estimate the impacts of TDG on fish downstream of dams and to develop improved guidelines for TDG.

The lethal effects and determinants of microcystin-LR on heart: a mini review

Toxin Reviews ◽  
2020 ◽  
pp. 1-10 ◽  
Author(s):  
Muwaffak Alosman ◽  
Linghui Cao ◽  
Isaac Yaw Massey ◽  
Fei Yang
Keyword(s):  
Lethal Effects
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