Posts Tagged ‘ants’

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Bug Off Red Training LogoThe Complete PMP Course

14-Hour course presented in 2 sessions.

Prepare for the 7A, 7F and Category 8 exams.

Recertification credits for Core 7A, 7F and 8.

Eligibility course for license upgrade.

A great preparatory course for the ACE Exam!

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spanish coverWashington- Cuando la inundación amenaza a toda la colonia las hormigas construyen balsas con sus propios cuerpos en el centro de las cuales va la reina, protegida, y las pupas se colocan en el fondo, según una investigación que difunde hoy Public Library of Science.

“Los organismos sociales pueden superar los retos ambientales mediante el esfuerzo colectivo”, señaló el estudio dirigido por Jessica Purcell, de la Universidad de Lausana, en Suiza.

La ventaja de los organismos sociales es que pueden reaccionar de manera colectiva y organizada desempeñando tareas que cada individuo no podría lograr por sí mismo. Por ejemplo, algunas sociedades responden a los predadores montando una defensa coordinada.

Algunas hormigas que se alimentan de hojas forman una línea con las obreras más grandes y escuadras de obreras más pequeñas para bloquear el avance de las hormigas invasoras. Las abejas de miel en japón rodean a las avispas predadoras, que son más grandes, formando un horno que eleva la temperatura y mata a la intrusa.

“Un ejemplo impresionante de tal conducta colectiva ocurre cuando las hormigas se enlazan físicamente formando balsas para escapar de una inundación”, explicó Purcell.

Pero la construcción de las balsas presenta lo que Purcell describe como un dilema social: dado que algunas posiciones implican más riesgo individual que las otras, cómo la comunidad distribuye costos y beneficios.

El grupo encabezado por Purcell estudió esta situación en las Formica selysi, unas hormigas que habitan en planicies propensas a las inundaciones, a las cuales llevaron al laboratorio y las sometieron a inundaciones simuladas.

“Observamos que las obreras quedan distribuidas por toda la balsa, las reinas siempre están en el centro protegidas por todos lados, y el cien por ciento de las pupas y larvas quedan en la base”, señala el artículo.

Los experimentos mostraron que las obreras y las pupas son extremadamente resistentes a la sumersión por lo cual la distribución en la balsa de los puestos de riesgo mayor tiene un costo social aceptable para la colonia.

“Esperábamos que los individuos sumergidos en la base de la balsa pagaran el costo más alto y nos sorprendió ver que sistemáticamente colocan a los miembros más jóvenes de la colonia en esa posición”, señaló Purcel.

Las obreras protegen al individuo más importante de toda la colonia, la reina, y usan la mayor capacidad de flotación de las pupas para proteger al grupo y minimizar las lesiones y muertes.

“La colocación de todas las pupas y larvas en la base de una balsa coherente brinda varios beneficios: preserva la integridad de la colonia, saca ventaja de su mayor capacidad de flotación y aumenta la proporción de obreras que se recuperan inmediatamente después de la necesidad de la balsa”, indicó el estudio.

It’s that time of the year and the ants are back. Unless these guys are identified properly it can be very difficult to control them. In PCT Magazine’s May Ant Control issue they emphasis the importance of proper identification of new ant species in their article Native or Invaders. Enjoy the article and if you need help identifying the species, come see us.

In January 2012, the National Pest Management Association (NPMA) completed a nationwide survey of pest management professionals (PMPs) regarding treatments for ants. Only bed bugs ranked as being more difficult to control. Ants were treated by 100 percent of the companies that participated in the survey. The most common ants treated were carpenter ants (66 percent of the companies), odorous house ants (62 percent) and pavement ants (59 percent). Six other species were treated and the number varied from 20 percent to 36 percent. Another question asked in the survey was: “Do you feel the incidence of ants in your region is increasing, decreasing or remaining the same?” Results revealed that 54 percent thought the incidence was increasing, whereas 41 percent thought it was the same and only 5 percent indicated the incidence was decreasing.

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2012 nype roperDr. Roper is a Senior Technical Representative for Syngenta. This was Dr. Roper’s first presentation at the New York Pest Expo.

Ants are fascinating creatures. The ant colony they form can be thought of as a society. There’s no centralized leadership, although there is a hierarchical structure and division of labor. They modify and exploit their environment to fit their food and shelter needs.

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The following article is from PestWest and written By Dr. Stuart Mitchell (speaker at the New York Pest Expo 11-8-2012)

Tramp ant species are perpetrators of structural invasions. Over 40 tramp ant species are held as infesting suspects. Individual species have individual modus operandi (behavioral attributes as well as preferred nesting and food preferences).

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Recently, the National Pest Management Association conducted a survey revealing ant infestations are on the rise.

According to this study, 100% of the pest control professionals interviewed treated  ant infestations in 2011. The most common types of ants found were carpenter ants, odorous house ants and pavement ants.

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According to a recent report in PCT Magazine, ant activity is on the rise. “PCOs were reporting a marked rise in ant work, with ants replacing cockroaches as the most economically important pest in many parts of the country. Research commissioned by PCT also indicated the ant segment tied or surpassed termite work as the largest growth segment for much of the decade. Early on, the ant increase was blamed on warmer weather patterns throughout the U.S. as well as an increase in homeowner watering systems.”

This report indicated not only warmer weather patterns being the cause but also an increase in worldwide trading. More shipments arriving in our ports are introducing a variety of new ant species to the US. Dr. Roger Gold, professor and endowed chair in urban and structural entomology at Texas A&M University is quoted in this article saying “The boom in ant work has been characterized by a number of invasive and problematic ant species having been introduced from other parts of the world. It just seems like in the last few years with a lot of trade going on internationally that we have a lot more introductions than I remember in my whole career.”

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