Screening Test for Detection of Leptinotarsa decemlineata (Say) Sensitivity to Insecticides
Skrining test u detekciji osetljivosti krompirove zlatice na insekticide
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Author
Indjic, Dusanka
Vukovic, Slavica
Tanaskovic, Snezana
Grahovac, Mila
Keresi, Tatjana
Gvozdenac, Sonja
Savcic-Petric, Snezana
Keywords
Leptinotarsa decemlineata-CPBInsecticides
Sensitivity
Resistance
Monitoring
insekticidi
osetljivost
otpornost
praćenje
Metadata
Show full item recordAbstract
In 2009, the sensitivity of 15 field populations of Colorado potato beetle (Leptinotarsa
decemlineata Say.) - CPB was assessed to chlorpyrifos, cypermethrin, thiamethoxam and fipronil,
four insecticides which are mostly used for its control in Serbia. Screening test that allows rapid
assessment of sensitivity of overwintered adults to insecticides was performed. Insecticides
were applied at label rates, and two, five and 10 fold higher rates by soaking method (5 sec).
Mortality was assessed after 72h. From 15 monitored populations of CPB, two were sensitive
to label rate of chlorpyrifos, one was slightly resistant, 11 were resistant and one population
was highly resistant. Concerning cypermethrin, two populations were sensitive, two slightly
resistant, five were resistant and six highly resistant. Highly sensitive to thiamethoxam label
rate were 12 populations, while three were sensitive. In the case of fipronil applied at label rate,
two populations were highly sensitive, six sensitive, one slightly resistant and six were resistant.
The application of insecticides at higher rates (2, 5 and 10 fold), that is justified only in bioassays,
provided a rapid insight into sensitivity of field populations of CPB to insecticides. Tokom 2009. godine ispitana je osetljivost 15 poljskih populacija krompirove zlatice
(Leptinotarsa decemlineata Say.) - CPB na insekticide. Ispitivanje je izvedeno screening testom
koji je omogućio brzu procenu osetljivosti prezimelih imaga na insekticide. Ocenjena
je osetljivost na četiri insekticida (hlorpirifos, cipermetrin, tiametoksam i fipronil), koji se
najčešće primenjuju u suzbijanju CPB u Srbiji. Insekticidi su primenjeni u preporučenoj, dva,
pet i 10 puta većim količinama od preporučene, metodom potapanja (5 sec). Smrtnost insekata
je određena posle 72h. Od 15 ispitanih populacija CPB, na količinu za praktičnu primenu
hlorpirifosa samo su dve osetljive, jedna je blago rezistentna, 11 je rezistentno i jedna
je visokorezistentna. Dve populacije su osetljive, dve blago rezistentne, pet je rezistentno i
šest visokorezistentno na cipermetrin. Visokoosetljivo je 12 populacija na količinu za praktičnu
primenu tiametoksama, a tri su osetljive. Na fipronil, dve su visokoosetljive populacije,
šest je osetljivo, jedna blago rezistentna i šest je rezistentno. Primenom povećanih količina
insekticida (2, 5 i 10 puta) od preporučenih, što opravdava samo metoda biotesta, došlo se
brzo do saznanja o osetljivosti poljskih populacija CPB na insekticide.