Light-trap Catch of the Common Cockchafer (Melolontha melolontha L.) Depending on the Atmospheric Ozone Concentration

The study deals the efficiency of light trapping of the Common Cockchafer ( Melolontha melolontha L.) (Coleoptera: Melolonthidae) in connection with the ozone concentration of air. The data of the Hungarian forestry light trap network w ere used for the years 1997 through 2006. We calculated relative catch values of from the number of caught insects. We assigned these to the ozone values of the respective days. For the classified d ate pairs regression equations were calculated. We established that the light trapping is most effecti ve if the ozone concentration is high. As opposed t o this, low ozone concentration reduces the success o f the catch. Our results may be utilized in plant protection and forest protection prognose

Sex Ratio Analysis of Some Macrolepidoptera Species Collected by Hungarian Forestry Light Traps

AbstractWe analysed the sex ratio of 32 macrolepidopteran species caught by Hungarian forestry light traps. That the ratio of males and females collected by light trap varies by species has been known for decades; however, the sex ratio found in the natural population is not known. All 32 species were processed separately, but by the same method. Both males and females were counted throughout the whole swarming. We calculated these figures and inspected the difference in the level of significance with the χ2 test. For each swarming we calculated the percentage of males and females. We also calculated the values of the variation coefficients, which express the deviations in average percentages.Males make up the majority of the moths captured in the trap; this result was mirrored by 29 of the 32 species investigated. One of the exceptions was the Pelosia muscerda Hfn. where we observed a male to female ratio that was equal. In addition to that Watsoniana cultraria Fabr. is the only one species captured by light traps that showed a significant female majority.Our results confirm that the majority of moths captured in traps are males. However, the proportion of males and females of each species, and even within the same species, tended to differ greatly with each swarming. Yet, it must be noted that these results speak only for those specimens captured by light traps and cannot be related directly to the actual sex ratio of populations living in the natural environment</jats:p

Light-Trap Catch of Insects in Connection with Environmental Factors

This chapter deals with the connection between the light-trap collection of insects and the environmental factors that influence the trapping. These factors are as follows: the solar activity and its effects on the Earth (solar activity featured by Q-Index and the 2800 MHz radio flux, ionospheric storms and atmospheric radio noises, the interplanetary magnetic field sector boundaries, UV-B radiation of the Sun and geomagnetic indices), the moon phases and the polarized moonlight, the weather (macrosynoptic weather situations, weather fronts and air masses, weather events, weather elements), and air pollutants. The presented results show that these all modify the volume of captured insects

Influence of Daily Temperature Ranges on the Light Trapped Number of Macrolepidoptera Individuals and Species

The Hungarian Forest Research Institute operated a Jermy-type light-trap in the Kámon Botanic Garden, Szombathely (47°15\u2720"N; 16°36\u2725"E) between 1962 and 1970. As the insects are poikilotherm creatures, therefore it is understandable; their body temperature is always the same as the temperature of the environment. It can be assumed, therefore, the temperature ranges, can ​​influence the flight activity of nocturnal Macrolepidoptera individuals and species, so we made this investigation. Different species are swarming in various aspects and the temperature is also different. Therefore, we processed separately the captured data of species and individuals in spring-, early- and late summer-, and autumn aspects, in connection with daily minimum temperature. The results were plotted and the correlations and their level of significance were determined. Our results demonstrate that all aspects on low temperature minima both the number of caught species and individuals are low. In contrast, a higher minimum value ​​of specimens was taken and the rising number of those species is caught. The relationship is linear or exponential function characterized

Light-trap Catch of Harmful Microlepidoptera Species in Connection with Polarized Moonlight and Collecting Distance

The paper deals with light-trap catch of 25 Microlepidoptera species depending on the polarized moonlight and collecting distance. The catching data were chosen from the 27 stations of the Hungarian National Light-trap Network and from the years between 1959 and 1961. Relative catch values were calculated from the catching data per stations and swarming.&nbsp; They are ranged and averaged in the phase angle divisions.&nbsp; The catching peak of ten species is in First Quarter, another ten species have the peak in the First Quarter and Last one, and only in two cases, the peak is in Last Quarter. Then there is the maximum ratio of polarized moonlight. Catching peak of only three species is in connection with the collecting distance when is the greatest of collection distance

Light-Trap Catch of Lygus SP. (Heteroptera: Miridae) in Connection with the Polarized Moonlight, the Collecting Distance and the Staying of the Moon Above the Horizon

The paper deals with connections between light trapping of Lygus sp. and the polarized moonlight, the collecting distance and the staying of the Moon above the horizon

Influence of Ozone Content on Light Trapped Trichoptera Species in Central Europe

The study deals with the connection between ozone content of air and light trap catch of ten Caddisflies (Trichoptera) species from a Jermy-type light-trap. Five species were collected in connection with the increasing the high values of the ozone content, but decrease were observed in case of four species. The results can be written down with second- or third-degree polynomials. Our results proved that the daily catches were significantly modified by the ozone content of air, expressing the different lengths and intensities of the ozone content. The different form of behaviour, however, is not linked to the taxonomic position. Further testing will be required for fuller explanation of the results