Z badań nad występowaniem komarów (Diptera, Culicinae) i ich zwalczaniem z apomocą aerozoli
Treść / Zawartość
Contribution to the occurrence of Diptera, Culicinae and their control using the aerosols
Issledovanija pojavlenija komarov (Diptera, Culicinae) i bor'by s nimi pri pomoshhi aehrozolejj
In order to determine the optimal terms of control of antropophilic species, the ecological-faunistical investigations were carried out taking into considerations the phenology of these mosquitos. Basing upon the results the control measures were elaborated and the evaluation of efficiency of aerosol application was done. In pilot investigations, only in the summer months, the presence of 14 antropophilic species was stated, among them 12 species out of the genus Aedes Meig. The dominant was A. vexans Meig., the subdominant was A. sticticus Meig. In sampling with the light source self-trapping, for general faunistical investigation were registered 16 species with ornitophilic species Culex pipiens pipiens L. at the top and with the for a longest time occurring Anopheles (Anopheles) maculipennis Meig. and Theobaldia annulata Schrank. In the water reservoirs were present exclusively the larvae of the genus Aedes. The species composition of this area was very rich in comparison to the number of 22 species for the Warszawa-region, noted by different investigators. During the full-season investigations of the 1965, in the spring-summer time, while sampling using baits and the self-trapping devide dominated species from the genus Aedes in the autumn using the self-trapping devide the C. pipiens dominated mixed up with T. annulata. A. maculipennis as well as not numerously present species of the genus Aedes (A. cinereus, A. vexans and other). In the water reservoirs dominated that year the species of the genus Theobaldia N-L., Anopheles, to a lower degree Culex. The rise of intensity of occurrence of Diptera, Culicinae during the season was noted four time, twice at very high degree. The control of the pests was based upon the method of laying down a chemical barrier. A technique of aerosol application in the open area was developed using the hand pulsating apparatus of the type "Swingfog" (GFR). A preparation rontaining 10% of DDT was applied in aerosol. The measures were applied as dry fog. The efficiency, at the rate of application of 8 l of chemical per ha was equal to 100% (in control of larvae in water reservoirs), at the rate of 6 1/ha (against the imago stages) it was 99.3-100%, and at 2-2.2 1/ha – 99.2-99.5%. These control measures resulted in lowering the intensity of presence of those pests in the investigated area. High operativeness of the chosen technique is indicated by the labor efficiency up to 5 ha/hour with the working width equal to 5-30 meters on lower costs as compared to the commonly applied dassical measures of control.