The larvicidal effect of different formulations od diflubenzuron and pyriproxyfen in larval control of Culex pipiens L. mosquitoes

[B. R. Pešić]

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Veterinarska medicina - Zoohigijena / Veterinary Medicine - Animal hygiene

U ovoj doktorskoj disertaciji ispitivana je efikasnost diflubenzurona i piriproksifena u formulacijama plivajućih granula, peleta, tableta i tonućih granula, peleta i tableta u dozi od 100 g diflubenzurona po hektaru i 50 g piriproksifena po hektaru. Ispitivanje formulacija je vršeno u malim i velikim terenskim ispitivanjima, a potvrda efikasnosti aktivnih supstanci je izvršena u laboratorijskim ispitivanjima. Praćeni su efekti inhibicije izletanja 1., 7., 14., 21., 28. i 35. dana nakon tretmana kako bi se utvrdila najbolja formulacija i aktivna supstanca koja će najduže pokazivati najvišu efikasnost. Najslabije efekte nakon 35 dana u ispitivanjima na kanalskim površinama pokazala je tonuća granula sa diflubenzuronom gde je smrtnost larvi iznosila 34,41% i tonuća tableta sa piriproksifenom 31,88%. Najbolju efikasnost dale su plivajuće formulacije i to plivajuće pelete gde je procenat uginulih larvi iznosio 58,20% 35. dana nakon tretmana. Imajući u vidu da se radi o novim formulacijama koje su napravljene od neškodljivih materija za životnu sredinu, one će u narednom periodu obezbediti veću efikasnost u suzbijanju larvi komaraca na terenu. Smanjenjem brojnosti larvi komaraca, doći će i do boljeg kvaliteta života ljudi, a i manjeg ugrožavanja njihovog zdravlja imajući u vidu bolesti koje se prenose komarcima, kako kod ljudi tako i kod životinja.

In this doctoral dissertation the efficiency of diflubenzuron and pyriproxyfen was tested in the formulations of floating granules, pellets, tablets and sinking granules, pellets and tablets at a dose of 100 g of diflubenzuron per hectare and 50 g of pyriproxyfen per hectare. Formulations were tested in small and large field tests, and the effectiveness of active substances was confirmed in laboratory tests. The emergence inhibition effects were monitored on the 1st, 7th, 14th, 21st, 28th and 35th days after treatment in order to determine the best formulation and active substance that will show the highest efficiency for the longest time. The weakest effects after 35 days in tests in field were shown by the sinking granule with diflubenzuron where the mortality of larvae was 34.41% and the sinking tablet with pyriproxyfen 31.88%. The best efficiency was provided by the floating formulations, namely the floating pellets, where the percentage of dead larvae was 58.20% on the 35th day after treatment. Bearing in mind that these are new formulations that are made from substances harmless to the environment, they will ensure greater efficiency in controlling mosquito larvae in the field in the coming period. By reducing the number of mosquito larvae, there will be a better quality of life for people, and less risk to their health, taking into account diseases transmitted by mosquitoes, both in humans and in animals.

diflubenzuron, piriproksifen, kontrola, komarci, larve komaraca

diflubenzuron, pyriproxyfen, control, mosquitoes, mosquito larvae

614.4:661.16.034.5(043.3)

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