scholarly journals Investigation of insect attraction effect of lamps with different color temperatures

Author(s):  
István Gyarmathy ◽  
Tamás Korompai ◽  
Richárd Novák ◽  
János Varga ◽  
Miklós Dombos

The aim of our research is to analyze the ecological effects of light sources of different colors. Quantity and size of arthropods captured by light traps are continuously recorded by the Zoolog auto sampler, along with temperature and humidity data. By statistically analyzing large amounts of data, it is possible to estimate the amount of biomass removed by different types of lamps from their habitat, to monitor daily and longer-term activity changes, and to analyze the attractiveness of LEDs of different color temperatures. This will also allow conclusions to be drawn for conservation management.

<em>Abstract.</em>—Light traps have been used to study the distribution and ecology of fish larvae in a variety of waters. Yet the physical and taxonomic limitations of light traps have been little studied, particularly in lotic systems. The purpose of this study was to examine aspects of light trap use, bias, and specificity in a natural stream setting. We sampled fish larvae using light traps in the upper Sacramento River watershed in April (2001, 2002) and June (2002) using five different color light sources and two trap sizes. Our results suggest that (1) small traps are as effective at sampling fish larvae as large traps, (2) color of light and/or relative intensity of light have strong effects on numbers of larvae collected, and (3) environmental factors play a role in the number of larvae collected over short time periods.


Acta Tropica ◽  
2018 ◽  
Vol 183 ◽  
pp. 61-63 ◽  
Author(s):  
Benedita Maria Costa-Neta ◽  
Abdias Ribeiro Lima-Neto ◽  
Apoliana Araújo da Silva ◽  
Jefferson Mesquita Brito ◽  
João Vitor Castro Aguiar ◽  
...  

Author(s):  
Ayman Y. Al-Rawashdeh ◽  
Omar Albarbarawi ◽  
Ghazi Qaryouti

<p>In this case study, two polycrystalline solar modules were installed outdoors (irradiated by sunlight) and indoors (irradiated by artificial lights). The solar cells in both cases were installed using different color filters that allowed the passage of certain light frequencies. The amount of energy produced by each module were measured and compared to a reference module with no filter. The results indicated the variable response of polycrystalline solar cells to natural and artificial light sources, being more responsive in both cases to red band color as could be deduced from their % current outputs (72.5% sunlight radiation; 84.38% artificial light sources). Other colors, including yellow, green, orange and violet afforded acceptable outputs. The results indicated that electrical outputs of indoor solar cells decreased when colored filters were used, but red filter in general afforded the maximum outputs, for both the artificially radiated indoor and naturally radiated outdoor solar cells. The case study suggests the possible complementary advantage of using indoor mounted solar cells for the production of electricity during artificial illumination period of the day.</p>


2016 ◽  
Vol 9 (2) ◽  
pp. 84-88 ◽  
Author(s):  
Marliton Rocha Barreto ◽  
Ledonir Geovani Da Silva

Resumo. O milho é o cereal com maior índice de consumo, tanto industrializado como in natura, atualmente. É o grão com maior volume de produção, sendo o Brasil o terceiro maior produtor, dessa maneira, faz-se necessário uma atenção especial voltada ao monitoramento e controle de certos invasores que comprometem sua produtividade. Dentre as pragas que podem afetar essa produtividade destacamos os percevejos (Hemiptera: Heteroptera), mais especificamente o percevejo-do-milho (Leptoglossus zonatus Dallas), que tem se mostrado uma importante praga para a cultura do milho. O presente trabalho teve por objetivo avaliar a eficiência de armadilhas caseiras do tipo “R. Bianco” na captura desse percevejo. Os experimentos foram conduzidos no Sitio Nossa Senhora Aparecida, localizado no município de Sinop, MT. As armadilhas foram divididas em 10 abertas e 10 fechadas e avaliadas com e sem isca por 20 dias. O delineamento utilizado foi o inteiramente casualizado (DIC) em esquema fatorial 2x2x2 com oito tratamentos e cinco repetições. As armadilhas sem iscas demonstraram maior eficiência, apresentando média superior na captura do percevejo em relação às armadilhas com isca. As armadilhas fechadas, em comparação com as abertas, demonstraram maior eficácia na retenção do inseto. O efeito da borda foi pouco representativo nesse experimento. Portanto, a presença da isca não influenciou na atração do inseto e os tratamentos submetidos ao teste sem isca apresentaram maiores quantidades e maior eficiência na captura de insetos. Levando a crer o efeito de atração do sal pelo percevejo e a localização de cada armadilha pouco influenciou na captura dos insetos.Trap Efficiency “R. Bianco” for Capture the insect Leptoglossus zonatus Dallas (Hemiptera: Coreidae) in Maize CropAbstract. Maize is the cereal with the highest consumption in both industrialized as fresh nowadays. It is the grain with higher volume production, Brazil is the third largest producer, need special attention focused on the monitoring and control of invaders who risk their productivity. Among the pests that can affect the productivity highlight the insects (Hemiptera: Heteroptera), more specifically the bedbugs corn (Leptoglossus zonatus Dallas), which has been an important pest for corn crops. Thus, this study aimed to evaluate the effectiveness of homemade traps R. Bianco in control of this insect. The experiments were conducted in Sitio Nossa Senhora Aparecida, in the municipality of Sinop, MT. Traps were divided into 10 open and 10 closed which were evaluated with and without baits by 20 days. The design was completely randomized (DIC) in a 2x2x2 factorial with eight treatments and five repetitions. Traps without baits showed greater efficiency, with an average higher in catching the bugs regarding the traps with bait. The trap closed as compared with the open, demonstrated greater efficacy in retaining the insect. The effect of edge was little representative in this experiment. Therefore, the presence of bait did not influence the insect attraction and treatments submitted to the bait without test showed higher quantities and more efficient insect capture. Leading us to believe the attraction effect of salt by bedbug and the location of each trap had little influence in the capture of insects.


2014 ◽  
Vol 1020 ◽  
pp. 25-30
Author(s):  
Marianna Šuštiaková ◽  
Pavol Ďurica ◽  
Radoslav Ponechal ◽  
Marek Cangár

The paper evaluated thermo-technical characteristics of the experimental walls, consisting of five different tracks in three different color surfaces at different base material. The hygrothermal behavior of the structures and layers is monitored year-round. The computational model of the laboratory room and tested samples is compiled and debugged on the basis of experimental measurements. The dynamic simulations of temperature and humidity parameters were realized.


1963 ◽  
Vol 95 (8) ◽  
pp. 832-837 ◽  
Author(s):  
P. Belton ◽  
R. H. Kempster

AbstractBy comparing the number of moths caught in box-type traps, attractant light sources can be arranged in the following order of efficiency: 15-watt fluorescent rubes emitting ultraviolet and visible light > 15-watt fluorescent tubes emitting cool white light ≥ germicidal rubes behind glass > 15-watt fluorescent tubes emitting ultraviolet but little visible light ≥ 100-watt mercury-vapour bulbs emitting ultraviolet but little visible light. Noctuoid and large geometroid (sent. lat.) moths discriminate between these light sources on the basis of their spectral content, but pyraloids, other small microlepidoptera and some geometroids probably do not. Pyraloid moths escaped in significant numbers from traps with normal apertures (13/4-inch), after sunrise. They freely entered traps with narrow apertures (1/2-inch) but these traps caught fewer large moths.


2008 ◽  
Vol 6 (4) ◽  
pp. 497-504 ◽  
Author(s):  
Elmar Fuchs ◽  
Karl Gatterer

AbstractA colour change of doped YAB crystals and microcrystalline powders takes place upon illumination with different white light sources. This paper presents extensive experimental data on the new materials Ho,Nd:YAB; Ho,Cr:YAB, Nd,Cr:YAB and Ho,Nd,Cr:YAB, resulting in a chart providing the observed crystal colours and chromaticity differences of the materials under illumination with seven different types of white light sources. The microcrystalline powders could be used as coatings in order to produce a special colour changing effect. Furthermore, the colour table presented enables the observer to discriminate the investigated light sources at one glance.


2013 ◽  
Vol 464 ◽  
pp. 194-198
Author(s):  
Ho Sang Ahn ◽  
Seung Yeon Song ◽  
Jae Hwan Ahn ◽  
Dae Gyu Jang ◽  
Jin Chul Joo

We measured chrominance of chrysotile powder using a colorimeter and a luminance meter under different light sources with seven color filters to test feasibility for the real time asbestos detector development. Chrysotile powder was prepared by heating asbestos fabric at 150 °C for 1hr and hydrochloric acid treatment was followed to remove other elements. Refractive index liquid was used as a color changing analyte to observe the change in chrominance of chrysotile. From the measurements, it revealed that a colorimeter was more suitable for the chrysotile detection by the maximum change in chrominance, especially in the short wave length range of blue regions. A luminance meter was not able to separate the difference in chrominance depending on different color and light sources regardless dyeing. It might be due to that reflected light from chrysotile particle was relatively weaker than that from illuminated area. It is our suggestion that the real time monitoring of asbestos in indoor air can be possible using a color sensor, specified to the unique wavelength of dyed chrysotile based on our chrominance data.


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