STUDIES OF THE EFFICACY OF INSECTICIDES AGAINST PEPPER-INFESTING APHIDS (APHIDIDAE)

Green peach aphid (Myzus persicae Sultzer) is permanently exposed to selection pressure by insecticidal treatments. This has resulted in the aphid populations to develop resistance to insecticides most applied in a number of countries. Another important pepper-infesting aphid is Aphis nasturtii Kalt. In Serbia, aphid resistance to insecticides has not been properly investigated so far. However, weak efficacy of some insecticides in controlling M, persicae and other types of aphids has often been observed in practice, mostly in treatments with organophosphorus compounds. In compliance with EPPO methods, experimental evaluations were performed in different localities, to determine the efficacy of insecticides based on dimethoate, pirimicarb, imidacloprid and thiacloprid against aphids attacking pepper. Neonicotinoid insecticides showed high or satisfactory efficacy (over 95%). However, pirimicarb efficacy was insufficient ( lt 85%) and dimethoate showed low efficacy in controlling some pest populations

EXPERIMENTAL EVALUATION OF INSECTICIDE EFFICACY IN CONTROLLING BREVICORYNE BRASSICAE L. IN CABBAGE

Cabbage aphid (Brevicoryne brassicae L.) is an important and highly destructive insect pest of cabbage in Serbia. It is capable of inflicting serious crop losses on cabbage and other brassica crops in some seasons, especially during periods of drought. The aphid is also a vector of viruses causing cabbage diseases and it must therefore be eliminated as a source of infestation. Employing appropriate EPPO methods, this study aimed to evaluate the biological efficacy of four insecticides in controlling B. brassicae and to determine possibilities for their use in practice. Among the tested insecticides, dimethoate and pirimicarb had been in use in the past, while acetamiprid and triazamate are new products. All tested products showed high levels of biological efficacy in the localities studied. The insecticidal products were mostly found to have 100% efficacy

Experimental evaluation of insecticide efficacy in controlling Brevicoryne brassicae L. in cabbage

Cabbage aphid (Brevicoryne brassicae L.) is an important and highly destructive insect pest of cabbage in Serbia. It is capable of inflicting serious crop losses on cabbage and other brassica crops in some seasons, especially during periods of drought. The aphid is also a vector of viruses causing cabbage diseases and it must therefore be eliminated as a source of infestation. Employing appropriate EPPO methods, this study aimed to evaluate the biological efficacy of four insecticides in controlling B. brassicae and to determine possibilities for their use in practice. Among the tested insecticides, dimethoate and pirimicarb had been in use in the past, while acetamiprid and triazamate are new products. All tested products showed high levels of biological efficacy in the localities studied. The insecticidal products were mostly found to have 100% efficacy

Studies of the efficacy of insecticides against pepper-infesting aphids (Aphididae)

Green peach aphid (Myzus persicae Sultzer) is permanently exposed to selection pressure by insecticidal treatments. This has resulted in the aphid populations to develop resistance to insecticides most applied in a number of countries. Another important pepper-infesting aphid is Aphis nasturtii Kalt. In Serbia, aphid resistance to insecticides has not been properly investigated so far. However, weak efficacy of some insecticides in controlling M, persicae and other types of aphids has often been observed in practice, mostly in treatments with organophosphorus compounds. In compliance with EPPO methods, experimental evaluations were performed in different localities, to determine the efficacy of insecticides based on dimethoate, pirimicarb, imidacloprid and thiacloprid against aphids attacking pepper. Neonicotinoid insecticides showed high or satisfactory efficacy (over 95%). However, pirimicarb efficacy was insufficient ( lt 85%) and dimethoate showed low efficacy in controlling some pest populations

Experimental evaluation of insecticides for Colorado potato beetle (Leptinotarsa decemlineata say) control in Serbia

Biological efficacy of the most frequently used and some newly-introduced insecticides for controlling Colorado potato beetle (Leptinotarsa decemlineata Say) in Serbia was evaluated in Indjija (in 2000 and 2003), Zemun Polje (in 2002 and 2003) and Surcin (in 2002) localities, against 1(st) generation of CPB. Neonicotinoids (acetamiprid, imidacloprid and thiacloprid) and fipronil showed high average efficacy of 96.1-100% in all three localities. Chlorpyriphos+cypermethrin achieved significantly lower average efficacy of 42.3-80.8%, compared to the efficacy of thiacloprid and fipronil, in 2002. The average efficacy of B. thuringiensis-product (60.6-85.1%) was significantly lower than the efficacy of thiacloprid and fipronil, in Surcin in 2002, and acetamiprid efficacy in 2003. The importance of these results for L. decemlineata control is discussed