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EN
Products based on different strains of entomopathogenic fungi are now being used in Integrated Pest Management (IPM) programs. Compatibility studies of chemical and biological control agents are necessary to be able to give proper recommendations for their integrated use. The effect of three insecticides based on imidacloprid, spinosad and abamectin, and three fungicides based on chlorothalonil, azoxystrobin and thiophanate-methyl on the activity of the following entomopathogenic fungi: Metarhizium anisopliae (Metschn.) sensu lato, Beauveria bassiana (Bals.-Criv.) Vuill., Acremonium sp. was tested under laboratory conditions. Tests of the influence of the pesticides on growth and production of conidia were performed. From this study, we concluded that all tested insecticides can be applied together with fungus B. bassiana products in IPM programs. They even stimulate sporulation of this fungus at the recommended dose, 0.5 of the recommended dose and 1.5 times the recommended dose. In the case of fungicides we observed inhibition of growth and sporulation of B. bassiana and reduction of growth and sporulation of other species of fungi.
7
Content available A short history of insecticides
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EN
This review contains a brief history of the use of insecticides. The peculiarities, main advantages, and disadvantages of some modern insecticides are described. The names of the discoverers of some of the most popular insecticide preparations on the world market, are listed. The tendencies to find new insecticides to control the quantity of phytophagous insects are discussed. Special attention is paid to the perspective of creating preparations based on nucleic acids, in particular DNA insecticides. The use of insect-specific, short single-stranded DNA fragments as DNA insecticides, is paving the way in the field of “intellectual” insecticides that “think” before they act. It is worth noting, though, that in the near future, the quantity of produced insecticides will increase due to the challenges associated with food production for a rapidly growing population. It is concluded, that an agreeable interaction of scientists and manufacturers of insecticides should lead to the selection of the most optimal solutions for insect pest control, which would be safe, affordable, and effective at the same time.
EN
The paper contains the description of mass poisoning of honey bees and the method used to determine dichlorodiphenyltrichloroethane, methoxychlor, and lindane in the insects. The ultrasound-aided extraction of pesticides from dead bees was conducted using dichloromethane and the analysis of the extracts was conducted using gas chromatography-mass spectrometry. The whole procedure was vatidated.
EN
Insecticides have leading role in reduction of population of arthropods, especially vectors of infectious diseases. Efficacy of insecticides is usually proved on biological material and described after adjusting the values of parameters in some “theoretical” function to the experimental results. In the standard approach, such function is described by probit regression. However, in some cases reaction of the population on pesticide differs from those which could be described by the probit regression curve and the results could not be properly assessed. The aim of this study was to elaboratie a practical tool for evaluating insecticide/acaricide efficacy, more universal than classical probit calculation. Software performing analysis was created using R 2.13.1 statistical software.
EN
The cowpea aphid, Aphis craccivora management relies mainly on chemical control. As a result extensive and repeated treatment of insecticides has led to the development of aphid resistance to commonly used insecticides. To investigate chlorpyrifos-methyl resistance in A. craccivora, a field strain was selected for 24-generations to achieve a resistance factor of 82.3 fold compared with a susceptible strain. In the resistant strain, malathion and lambda-cyhalothrin exhibited obvious cross-resistance; while fenvalerate and dinotefuran showed moderate cross-resistance. In contrast, slight or no cross-resistance was obtained with the other tested insecticides. To investigate metabolic resistance mechanisms, integration of biochemical and synergism assays was conducted. Results showed the key role of esterase (EST) and mixed function oxidases (MFO); however, glutathione-s-transferase (GST) contributed less to resistance. Cross-resistance studies showed the need for rotation with non-cross resistant insecticides as a resistance management tactic.
17
Content available remote Nowe substancje aktywne insektycydów stosowane w Polsce
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PL
Ponad 1/3 substancji aktywnych insektycydów stosowanych obecnie w Polsce (21 z 59) została wprowadzona na rynek w XXI w. Ostatnie lata przyniosły zmniejszenie ich liczby, jak również różnorodności grup chemicznych i mechanizmów działania. Nowo wprowadzone substancje aktywne nie były liczne, ale posiadały 8 nowych mechanizmów działania.
EN
A review with 14 refs.
EN
Polychlorinated biphenyls (PCBs) and chloroorganic insecticides interfere with gas chromatographic analysis, thereby complicating their quantitative determination when multiple compounds are assayed. Perchlorination of the standards of the chlorinated compounds was used to simplify quantitative determination of these contaminants. Results indicate that perchlorination converts PCBs to a single compound (decachlorobiphenyl – DCB) that does not interfere with the assay for chloroorganic insecticides. These data confirm that perchlorination allows for simultaneous testing of both PCBs and chloroorganic insecticides during chromatographic analysis.
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