2015, vol. 43, br. 6, str. 680-690
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Monitoring osetljivosti krompirove zlatice (Leptinotarsa decemlineata Say.) prema insekticidima na teritoriji Republike Srbije
Monitoring of potato beetle (Leptinotarsa decemlineata Say.) susceptibility to insecticides on the territory of the Republic of Serbia
Keywords: potato beetle (Leptinotarsa decemlineata); insecticide(hlorpyrifos, cypermethrin, thiamethoxam, fipronil and abamectin); resistance; monitoring
Sažetak
Tokom 2008. i 2009. godine ispitana je osetljivost 80 poljskih populacija krompirove zlatice (Leptinotarsa decemlineata Say.) prema insekticidima. Ispitivanje je izvedeno screening testom koji je omogućio brzu procenu osetljivosti prezimelih imaga prema insekticidima. Ocenjena je osetljivost na pet insekticida (hlorpirifos, cipermetrin, tiametoksam, fi pronil i abamektin) koji se najčešće primenjuju u suzbijanju krompirove zlatice u Srbiji. Insekticidi su primenjeni u propisanoj, dva i pet puta većim količinama od propisane, metodom potapanja insekata. Smtrnost insekata je određena posle 72 h, a ostvareni rezultati su korigovani za smrtnost u kontroli i prikazani preko efikasnosti (%). U 2008. godini od 40 ispitanih populacija krompirove zlatice, samo su dve populacije ispoljile visoku rezistentnost, 21 je rezistentna, dve blago rezistentne i 15 osetljivih do visoko osetljivih prema hlorpirifosu u količini za praktičnu primenu. Prema cipermetrinu jedna je visoko rezistentna, 13 rezistentnih, tri blago rezistentne i 23 osetljive do visoko osetljive. Prema tiametoksamu je jedna populacija blago rezistentna, dok je 39 osetljivo do visoko osetljivo. Zatim prema fipronilu je 10 populacija ispoljilo rezistentnost, tri su blagu rezistentnos, a 25 su osetljive do visoko osetljivet. Sve populacije su bile visoko osetljive prema abamektinu. U 2009. godini, takođe od 40 populacija krompirove zlatice, jedna je ispoljila visoku rezistentnost, 18 je rezistentnih, pet blago rezistentne i 16 su osetljive do visoko osetljive prema hlorpirifosu. Šest je visoko rezistentno, 11 rezistentno, sedam blago rezistentno i 16 osetljive do visoko osetljive prema cipermetrinu. Dve populacije su rezistentne prema tiametoksamu, a 38 je osetljivo do visoko osetljivo. Prema fipronilu je osam populacija ispoljilo rezistnetnost, dve blagu rezistentnost, a 30 su osetljive do visoko osetljive, dok su prema abamektinu tri populacije visoko rezistentne, četiri rezistentne, tri blago rezistentne i 30 osetljive do visoko osetljive.
Abstract
During 2008 and 2009, the susceptibility to insecticides of 80 field populations of potato beetle (Leptinotarsa decemlineata Say.) was studied. The research was conducted by a screening test enabling the fast assessment of over-wintered imagoes to insecticides. Susceptibility of five insecticides (such as hlorpyrifos, cypermethrin, thiamethoxam, fipronil and abamectin) most frequently applied in the control of potato beetle in Serbia was evaluated. The insecticides were applied at the prescribed amount, two and fi ve times higher quantities than prescribed, by the method of insect immersion. The mortality of insects was determined after 72 hours, and the achieved results were corrected for mortality in control and presented as effi ciency (%). In 2008, only two of the forty populations of potato beetle assessed showed high resistance, 21 were resistant, and two were slightly resistant to hlorpyrifos at rates for use in practice. One showed high resistance to cypermethrin, 13 were resistant, and three slightly resistant. With regard to fipronil, 10 populations showed resistance, and three were slightly resistant. One population showed low resistance to thiamethoxam, while 39 were susceptible to highly susceptible. All populations were highly susceptible to abamectin. In 2009, of the forty populations of potato beetle also assessed, one showed high resistance, 18 were resistant, and fi ve slightly resistant to hlorpyrifos. Six were highly resistant, 11 resistant, and seven slightly resistant to cypermethrin. Two populations were resistant to thiamethoxam, seven showed resistance to fipronil, and two were slightly resistant, while three populations were highly resistant to abamectin, four were resistant, and three slightly resistant.
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