Zeolites as Pheromone Dispensers

Muñoz-Pallares, J.; Corma, Avelino; Primo, Jaime; Primo‐Yúfera, Eduardo

doi:10.1021/jf010223o

Cited by 49 publications

(37 citation statements)

References 10 publications

(11 reference statements)

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“…Dispensers are materials with structural characteristics that enable them to adsorb the pheromone molecules, and further provide slow and controlled release of those molecules during the entire capture period of the target insect (which could last from a few days to several months). 4,5 The search for adequate materials to be used as pheromone dispensers for several kinds of pheromone molecules is a challenge in this field. Many kinds of materials have been investigated as pheromone dispensers, such as filter paper, 6 nylon mesh, 7 polymers, 8,9 paraffin wax, 10 zeolites 4 and glass ampoules, 11 among others.…”

Section: Introductionmentioning

confidence: 99%

“…Many kinds of materials have been investigated as pheromone dispensers, such as filter paper, 6 nylon mesh, 7 polymers, 8,9 paraffin wax, 10 zeolites 4 and glass ampoules, 11 among others. The commercially available dispensers are mainly made from different kinds of polymers.As insightfully pointed out by 4 there are four basic requirements for an effective pheromone dispenser: (i) kinetic emission should be close to the optimum velocity for each specific capture (which depends on several characteristics as intensity and type of pest, weather conditions, type of treatment being employed, etc. ), in order to decrease the number of applications required; (ii) the dispenser should adapt to various release requirements (chemical characteristics of pheromone molecules, type of treatment, weather conditions); (iii) since a great number of insect pheromones are composed of a mixture of compounds (generally containing different volatilities), dispensers should be able to adsorb and further emit these components at the correct proportions; (iv) dispensers should be environmentally inert.…”

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confidence: 99%

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Evaluation of porous silica glasses as insect pheromone dispensers

Tiboni

Coracini

Lima

et al. 2008

J. Braz. Chem. Soc.

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Este trabalho demonstra a viabilidade da utilização de vidros porosos como materiais para armazenar e liberar feromônios de insetos, visando o controle de pragas na agricultura. Feromônios de diferentes insetos foram impregnados em vidros porosos do tipo Vycor (PVG), e o material impregnado foi caracterizado por espectroscopia de absorção no infravermelho. A determinação da taxa de liberação do feromônio em laboratório, bem como o teste prático de captura de insetos em diferentes plantações, foram subseqüentemente realizados. Foram realizados testes com feromônios da Grapholita molesta (Lepidoptera: Tortricidae) e Leucoptera coffeella (Lepidoptera: Lyonetiidae), as principais pestes da maçã e café, respectivamente, em plantações brasileiras. Verificou-se que a taxa de liberação do feromônio depende do tipo de interação com as paredes dos poros do PVG. Os resultados indicaram uma boa performance do PVG, semelhante à de septos de borracha utilizados comercialmente como liberadores. Estes resultados, somados ao fato de que o PVG não é nocivo ao meio ambiente e pode ser reutilizado em vários ciclos de impregnação e liberação, fazem destes vidros porosos candidatos em potencial para aplicação no controle de pragas na agricultura.This work demonstrates the viability and advantages of using porous silica glass as an insect pheromone dispenser, in order to control insect population in agriculture. Pieces of so-called Porous Vycor Glass (PVG) were impregnated with pheromones of different insects (both consisting of a single compound or a mixture of compounds). Studies were conducted to characterize the impregnated-PVG and to determine the pheromone release ratio under laboratory conditions. The practical application was verified in two different plantation areas, using the PVG impregnated with pheromone from Grapholita molesta (Lepidoptera: Tortricidae) and Leucoptera coffeella (Lepidoptera: Lyonetiidae), the main pests of apple and coffee plantations in Brazil, respectively. The release rate was dependent on the interaction between the molecules of the impregnated pheromone and the surface of the PVG pores. A good performance of the porous glass was observed, similar to that of rubber septa commercially used as pheromone dispensers.Keywords: porous glass, adsorption, pheromones, slow release, chemical ecology IntroductionThe number of insects and other species that are developing resistance to pesticides is growing steadily, forcing chemical companies to work out novel pesticide formulas. The concept of integrated pest management (IPM) was developed in response to the problems caused by the increased use of conventional pesticides. IPM combines chemical, biological, and agrotechnical approaches to achieve pest control at a reasonable cost, while minimizing damage to the environment. The first step in IPM is to perform effective monitoring through the uses of pheromones. [1][2][3] Pheromones are substances which occur in nature and are used for chemical communication between animals of the same species. The main ways by ...

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Evaluation of porous silica glasses as insect pheromone dispensers

Tiboni

Coracini

Lima

et al. 2008

J. Braz. Chem. Soc.

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“…b) Cinética de emisión: para que el uso de las feromonas en el control de plagas sea eficaz, se ha de conseguir que el emisor tenga una cinética de emisión adecuada. La cinética ideal es la de orden cero (Figura 1.5.1), aquella en la que la velocidad de emisión es constante con el tiempo, evitando una emisión inicial elevada y una carga residual alta al final de tratamiento (Muñoz-Pallarés et al, 2001). En cualquier caso, la mayoría de los emisores comercializados tienen cinéticas de primer orden que con el tiempo pueden resultar inadecuadas para el funcionamiento de la técnica en cuestión.…”

Section: Dispositivos Emisoresunclassified

“…This is a key factor in dispenser cost and, consequently, in the cost of the control method. It is also an essential feature of a good pheromone dispenser (Muñoz-Pallarés et al, 2001;Stelinski et al, 2005).…”

Section: I323 Pheromone Release Profilesmentioning

confidence: 99%

“…Previous work demonstrates that zeolites and other mesoporous materials are suitable matrices for manufacturing dispensers because of their ability for retaining substances depending on their polarities and molecular sizes. Moreover, chemical structure and properties of these materials can be adapted to release substances at an adequate emission rate over a long period of time (Muñoz-Pallarés et al, 2001).…”

Section: V1 Introductionmentioning

confidence: 99%

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Uso de semioquímicos en el control de plagas. Estudios básicos y de aplicación

González¹

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The Synthesis of an Extra‐Large‐Pore Zeolite with Double Three‐Ring Building Units and a Low Framework Density

Jiang¹,

Jordá²,

Díaz–Cabañas³

et al. 2010

Angewandte Chemie

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Zeolites are crystalline inorganic solids formed by TO 4 tetrahedra (T = Si, P, Al, Ge, etc.) with a well-defined system of regular pores having diameters up to about 2 nm. [1,2] The possibility of tuning pore dimensions and framework compositions have made zeolites the most successful materials for applications in gas adsorption and separation and for catalysis. [3,4] Their uses have been further expanded [3] to microelectronics for preparing materials with low values of the high-frequency dielectric constant [5] or manufacturing encapsulated light-emitting devices (LEDs), [6] to medicine for diagnostic treatments [7] and controlled drug delivery, or for release of semiotics for controlling insect populations in agricultural uses. [8] Those applications often require structures with low framework densities, large internal volumes, and preferentially, extra-large pores. However, up to now, the number of known zeolites with a low framework density (FD 12) is almost negligible, and the number with extra-large pores (! 18-R) is also extremely small. [1] Computational methods can predict a large number of thermodynamically feasible new structures, and they can stimulate and inspire the discovery of new structures. [9][10][11] For example, Foster and Treacy [10] have used a symmetry-constrained intersite bond searching method and have generated more than two million structures. With that methodology, the authors predicted a series of thermodynamically feasible extra-large-pore zeolites. Deem et al. [11] have also modeled relatively large number of low density zeolites and were able to show that the low-energy and low-density materials also tend to have desirably large rings.Among the zeolite structures with extra large pores predicted by Foster and Treacy, there is one with 18 10 10-R pore topology that could be of particular interest for catalysis, as it combines an extra-large pore (18-R) for molecular accessibility with connected 10-R pores that can introduce shape-selectivity effects. Recently, the predicted zeolite was synthesized and named ITQ-33. [12] This zeolite has 3-R and D4R units in the structure, and was at the time the silicate-based zeolite with the lowest framework density (12.3.T/1000 3 ). The pore topology of this extra-large-pore zeolite presented quite unique and interesting catalytic properties: The pore accessibility to large molecules through the 18-R was combined with shape selectivity in the 10-R pores for the primary products formed. [13] In the same data base, Foster and Treacy also predicted an extra-large-pore zeolite that was closely related to ITQ-33 (Zeolite reference 191_4_1985). In that new structure, the 10-R pores of ITQ-33 were expanded to 12-R pores connecting the larger perpendicular 18-R channels. The result was a zeolite with 18 12 12 pore topology instead of the 18 10 10 for ITQ-33. In particular, along with D4R units, the new zeolite contains D3R units that have never been seen in synthesized zeolites, which could be related to geometric strains introduced in the framework ...

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Zeolites as Pheromone Dispensers

Cited by 49 publications

References 10 publications

Evaluation of porous silica glasses as insect pheromone dispensers

Evaluation of porous silica glasses as insect pheromone dispensers

Uso de semioquímicos en el control de plagas. Estudios básicos y de aplicación

The Synthesis of an Extra‐Large‐Pore Zeolite with Double Three‐Ring Building Units and a Low Framework Density

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