In the region of Szigetköz (North-West Hungary) mosquito larvae were regularly collected at 64 sites in 16 villages of 4 districts every week between 1-30 September, 1999. As a result we identified the larvae of 19 mosquito species, among them 93.68% were Aedes vexans Meig. and 5.11% were Culex pipiens pipiens L. The numbers of the mosquito larvae to be collected at site proves the heterogenity of the biotops in the districts. We collected 5718 larvae in district I, 2401 larvae in district II, 1170 in district III, 232 344 in district IV. District IV reflects the effect of the Danube floods i.e. the flood area was overflown with perched water and the water temperatures often rose above 30 °C. These factors contributed to the dominance of Aedes vexans. Regular inspections, the knowledge of the species and the identification of the larvae development enabled us to set the date of optimal biological protection.
Flight activity and species
composition of alata aphids was monitored by yellow water pan traps for 20
years (1982-2001). Yellow pan traps were placed into potato fields, the
species composition of potato colonizing aphids was also studied in Mosonmagyaróvár, Hungary. The results of the study
are relevant to the region of Kisalföld.
The dominance of the aphid species was the following: A. nasturtii 44%, M.
euphorbiae 6%, M. fragariae 1% and M. persicae 49%. Based on our data M.
persicaee dominated among the species that damaged potatoes in the region of
Kisalföld. Linear regression analyses revealed a significant
relationship between the relative number of species caught and those living on
the plants R2=0.7734 proving a reliable forecast. There was significant
relationship between number of flying and potato colonizing aphids and the mild
temperature values (R2=0.5224 and 0.4494), respectively. There was a strong
relationship between the effective heat sum, calculated from the temperature
data between 1st May and 31st August, and the number of aphids caught in traps
and those of feeding on the plants R2=0.8755 and 0.9233, respectively.