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  • Author or Editor: L. Nowinszky x
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The paper deals with connections between solar flare activities and light-trap collection of insects. The authors have worked out the catch data of European corn borer (Ostrinia nubilalis Hbn.) adults, as published for the period of 1976–1997 by the Hungarian national light-trap network. The results proved that both the daily and annual catches were significantly modified by the Q-indexes, expressing the different lengths and intensities of the solar flares. On days with high Q-indexes relative to the ones of the average swarming periods, the number of catches are considerably lower. In those years when the Q-index is high, the average individual number and the number of caught moths are lower by 30% as compared to the average number of total cycles (11 years) and the average population density of a given biotope. On the contrary, in years with low Q-indexes an increase as high as 45% can be experienced in the number of individuals collected. Thus, by evaluating the light-trap catches a strong modifying effect of solar flares has to be considered.

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The change of the number of turnip moth (Scotia segetum Schiff.) females was examined at 65 different light trap stations between 1957 and 1990. There are two generations of the examined species in Hungary, but the indi­vi­dual number of the first generation is low year by year, so we process­ed only the data of the second generation. Only those generations were examined that had more than 100 samples because of the statistical reliability. Thirty-three light trap stations were suitable for this examination. The joint number of yearly caught male and female individuals and also separately the samples of females were summarised for each observing station. The change of female individual number as a function of total individual number was determined from the coherent pairs of value. The connection can be described by linear function. The proportion of females is 38%. The relative frequency of females was also determined in the function of the individual number. The shown point-mass is similar to the damped vibration known at technical systems. It was established that the female proportion was higher than the average if the individual number is low, but it showed average value when the individual number was high. It can also be established that the female proportion is significantly high in some cases before gradation years.

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The studies aimed to acquire the widest possible information on the annual flight in Hungary of the European corn borer (ECB), Ostrinia nubilalis Hübner (Lepidoptera: Pyralidae). The investigations used biomathematical (Part 1) and graphical (Part 2) evaluation to document changes in the individual population number.The study was conducted in Hungary using ECB moth capture records from the Plant Protection Information System black light trap system (1991–2004). We have drawn conclusions on the appearance of annual flights and the tendency of alterations in flight direction by means of light trap results in four different areas in Hungary. We calculated the flight peak quotients, the individual population numbers of the second flight peak, the distinctions of individual numbers of two flight peaks in this part.As previously published, alterations in flight direction of ECB flights began at different times in Hungary. In the current study, a gradual disappearance of the univoltine ecotype and gradual appearance of the bivoltine ecotype ECB in Hungary is confirmed by the data obtained between 1991–2004. Flight peak quotients and data concerning the second flight peak have confirmed change this process, too: the appearance of a second flight peak in Northwestern Hungary from 1995–1996 (FP = 1.27), the more significant appearance of flights in August in Western Hungary (FP = 1.05) and Northeastern Hungary (FP = 1.45), and a three and four times more individual number of the second flight peak in Southeastern Hungary (FP = 3.44). Flight peak quotients, individual population numbers of the second flight peak, the tendency towards a difference in population number of the two peaks, and size of increase of these values demonstrates the southeastern-northwestern presence of the bivoltine ecotype in Hungary.

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The studies aimed to acquire the widest possible information on the annual flight in Hungary of the European corn borer (ECB), Ostrinia nubilalis Hübner (Lepidoptera: Pyralidae). The investigations used biomathematical (Part 1) and graphical (Part 2) assay to document forthcoming changes in the individual population number.The study was conducted in Hungary using ECB moth capture records from the Plant Protection Information System black light trap system (1991–2004). We have drawn conclusions on the appearance of annual flights and the tendency of alterations in flight direction by means of light trap results in four different areas in Hungary. We prepared and estimated the flight phenology diagrams of ECB in this part.Assay of 224 flight phenology diagrams showed the phenomenon of flight alteration too, which characterized the cyclical change of different phenology types. We determined four well-differentiated flight types. The European corn borer (ECB) univoltine ecotype is characterized by a “bell” type and the bivoltine ecotype is characterized by “nail” type. We also ascertained two temporary types. The “plateau” type can be observed in the initial period of flight alteration, and the “valley” type in the latter stages of flight alteration.

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European corn borer (ECB) flight and ecotype spread examinations were made in Hungary with the help of catching results of 44 agricultural Jermy light traps (2004). We wondered about alteration of flight types spread borderline as a function of global climate change. Catching data were evaluated by simple mathematical proportional numbers. Catching results originating from different points of the country were compared with Walter-Lieth climate diagram (2004) and Péczely’s Hungarian climate districts. Latter was to reveal correlations of flight types and different climatic districts.The previously published flight alteration tendency of ECB (Keszthelyi 2003, 2004b) continued in 2004. Generation quotients proved this process too. Average generation quotient of populations in South-eastern Hungary was 6, and the top of the same rate in this district was 10,84. The earlier observed „one peak flight” type was replaced by „two peaks flight” type in North-western Hungary (average generation quotient of this district: 2,5). The 1RIN (relative individual number per one day) shows regressive tendency from South-eastern Hungary to North-western Hungary (1RIN of 1.district: 6,99; 1RIN of 4.district: 4,69; 1RIN of 10.district: 2,78), but unequivocal conclusions cannot be drawn from these values for places of ecotypes. There is no unambiguous connection between Péczely’s Hungarian climate districts and spread of ECB flight types as proved by the statistical examinations.

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We made an examination using the data of higher and lower light-traps of Talcal, Rezi and Kecskemét. We made comparison between the catch and the moon phases.Our results, got from the data of Kecskemét light-trap, prove the proportion of caught samples both of fall webworm ( Hyphantria cunea Drury) and of turnip moth ( Scotia segetum Schiff.) is the most equable at the lower and higher levels at the time of full moon.The proportion of Microlepidoptera individuals (Tarcal), caught by lower and higher light-traps at Tarcal, is the highest at new moon, but it is higher at full moon than at first and last quarter and the proportion of caught species number is also similar.The proportion of Macrolepidoptera individuals (Rezi), caught by lower and higher traps is highest in the last quarter, the lowest in first quarter and at full moon. The proportion of caught species shows similar but more strikingly marked picture.

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