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Oil seed rape is important culture for oil production. Oil seed rape vegetation started at the end of summer or at the beginning of autumn and finished at beginning of summer next year. During this vegetation it is necessary to protect oil seed rape against some insects like meligethes aeneus which cause damages and decrease of yield. In this paper it was analyze problems in oil seed rape protection against insects. Accent is on analyses of bio-efficacy and quality parameters by treatment with different type of nozzles. The most important quality parameters which was analyze in this paper is leaf coverage. Beside this research it was also analyzed transversal distribution of nozzles. Treating was done with application rate 200 l/ha and three different type of nozzles. The lowest leaf coverage was achieved with standard nozzles Lechler LU120-04, 36,79 %. Better coverage was achieved with nozzles IDK 120-04, 37,24 % and the best coverages of 44,64 % was reach with 'Twin Jet' IDKT 120-04 nozzles. It was not found any different in bio-efficacy by treatment with different type of nozzles, but because very low insects attack intensity this results should be take with reserve. Checking of transversal distribution shown that CV of different nozzles was between 4,86 % and 6,02 %, which is good, because permit level is 10 %. Uljana repica je važna uljana kultura. Njena vegetacija počinje krajem leta i početkom jeseni, a završava se obično početkom leta naredne godine. Tokom vegetacije vrši se hemijska zaštita uljane repice u cilju suzbijanja sjajnika i repine pipe. U radu su dati rezultati istraživanja kvaliteta i biološke efikasnosti hemijske zaštite repice protiv sjajnika i repine pipe uz istovremenu analizu uniformnosti poprečne distribucije. Tretiranje je obavljeno sa normom od 200 l/ha i tri vrste rasprskivača na istoj parceli u istim uslovima. Kvalitet tretiranja je praćen analizom pokrivenosti. Najbolja pokrivenost od 44,64 % je ostvarena primenom Lechler Twin Jet IDKT 120-04 rasprskivača dok primena klasičnog injektorskog Lechler IDK 120-04 i standardnog rasprskivača Lechler LU 120-04 beleži gotovo identičnu pokrivenost od 37,24 % i 36,79 %. Analiza biološke efikasnosti nije dala nikakve razlike po pitanju primene različitih tipova rasprskivača, ali zbog izuzetno slabog intenziteta napada štetočina ove rezultate treba uzeti sa rezervom. Provera koeficijenta varijacije poprečne distribuciju je pokazala da je poprečna distribucija sva tri rasprskivača bila dobra i kretala se u intervalu od 4,86 % do 6,02 %, što su vrednosti manje od dozvoljenih 10 %. |
