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 o
2015
Inđić, Dušanka (Poljoprivredni fakultet, Novi Sad (Srbija)) | Vuković, Slavica (Poljoprivredni fakultet, Novi Sad (Srbija))
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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