Abstract Thermal requirements for development and life table statistics of Aphis gossypii Glover (Homoptera, Aphididae) were determined over a range constant temperatures from 10 to 30 °C. The lower threshold the sum effective 6.9 °C 90.1 °C, respectively, preimaginal development, 5.8 113.6 birth onset reproduction. Mean total fecundity ranged 36 larvae per female at 76 On time scale days, net reproductive rate ( R o ) increased with increasing temperature while generation T decreased...

The dynamics of 32 active substances contained in pesticide formulations (15 fungicides and 17 insecticides) were analyzed iceberg lettuce, onion, leek, carrot, parsley. Pesticide residues monitored from the time application until harvest. In total, 114 mathematical models residue dissipation developed using a first-order kinetic equation. Based on these models, it was possible to predict action pre-harvest interval (the between last crop harvest) needed attain targeted threshold (value...

Abstract: Two management systems, biological and integrated, were compared to control the major pest, codling moth ( Cydia pomonella ) in apple orchards. The aim of study was assess effect these two systems on arboreal spiders. system based use preparations, whereas integrated selective pesticides employed. plot had no pesticide treatment. abundance spiders similar all plots during 3 years study. Diversity, however, higher than plots, suggesting that response guild‐specific. Four spider...

Insecticide bioassays were used to investigate resistance of Cydia pomonella (L.) (Lepidoptera: Tortricidae) insecticides with various types active ingredients. The efficacy baselines selected insect growth regulators (fenoxycarb), inhibitors (diflubenzuron and teflubenzuron), organophoshorous (phosalone), neonicotinoids (thiacloprid) against the eggs first fifth instars sensitive laboratory strains codling moth determined. According concentration-mortality baseline, 50% lethality...

Abstract BACKGROUND: Pyrethroids and organophosphates are the most frequently used insecticides for Colorado potato beetle, Leptinotarsa decemlineata (Say), control in Czech Republic. Based on molecular methods, organophosphate pyrethroid resistance alleles have been detected samples from three sites. The accuracy of restriction fragment length polymorphism (RFLP) bidirectional polymerase chain reaction amplification specific (Bi‐PASA) detection is compared. RESULTS: sites showed higher...

Abstract BACKGROUND An increase in the spread of pyrethroid resistance pollen beetle has been documented many European countries. Pyrethroid Czech Republic detected using a topical application bioassay. Resistance monitoring carried out during implementation insect management. RESULTS The susceptibilities nine populations to four pyrethroids 2009 − 2015 are presented this paper. highest ratio (RR) values [based on lethal dose for 50% population (LD 50 )] obtained deltamethrin, lambda...

Pesticide residues from the time of application until harvest were analysed for 20, 17 and 18 active insecticidal fungicidal substances in Chinese cabbage, head cabbage cauliflower, respectively. In total, 40 mathematical models residue degradation developed using a first-order kinetic equation, these it was possible to forecast action pre-harvest interval given threshold low-residue production Brassica vegetables as percentage maximum level. Additionally, establish an based on 0.01 mg kg‒1...

The Colorado potato beetle (CPB; Leptinotarsa decemlineata ) is an important pest with known resistance to pyrethroids and organophosphates in Czechia. Decreased efficacy of neonicotinoids has been observed last decade. After the restriction using chlorpyrifos, thiacloprid thiamethoxam by EU regulation, growers seek for information about CPB used insecticides recommended antiresistant strategies. development selected was evaluated bioassays 69 local populations from Czechia 2017–2022...

Abstract The paper presents the results of a 5‐year research on Ceutorhynchus napi, C. pallidactylus, assimilis and Meligethes aeneus , pests winter rape. population dynamics, flight activity, changes in sex ratio, oogenesis these were studied using yellow water‐traps. sums effective temperatures for activity (SETF) determined. ratio above species showed distinct changes, percentage females being higher than that males. Also, there was considerable difference between development ova...

The effect of two strategies, used to control Ostrinia nubialis, on the abundance and diversity epigeic spiders harvestmen in maize was monitored. strategies were (1) transgenic insect-resistant maize, (2) biological by Trichogramma wasps an isogenic hybrid. They compared with a conventional system (isogenic hybrid), which taken as control. investigation performed at localities (Ivanovice na Hané Prague) Czech Republic from 2002 2004. Spiders (Araneae) (Opiliones) collected means pitfall...

Abstract: The community structure and population dynamics of Heteroptera was studied in an apple orchard the Czech Republic, between 1992 1995. study investigated changes which occurred after introduction integrated pest management (IPM) practices into intensive orchard. IPM consisted establishing grass ground cover or planting six selected herb species two wide belts along rows trees. areas were compared with where chemical control continued. Seventy captured (22 predatory 48 phytophagous)....

The efficacy of Bt maize MON 810-YieldGard® and Trichogramma wasp against European corn borer (ECB) (Ostrinia nubilalis Hübner) was evaluated in the period 2002-2008 field trials on three localities Czech Republic. reduction number tunnels caused by ECB per 100 plants before harvest always 100% that treatment average 50%. mean increase yield 15% 10% obtained treatments, respectively comparison with untreated control. damage curve economic injury level developed for evaluation losses...

The cabbage stem flea beetle (CSFB), Psylliodes chrysocephala (Coleoptera: Chrysomelidae), has recently become a major pest species in winter oilseed rape the Czech Republic. susceptibility of CSFB populations from two localities to six pyrethroids, neonicotinoids, one organophosphate and oxadiazine was evaluated 2015-2018 glass vial experiments. thiacloprid thiamethoxam feeding experiment 2017 2018. High lambda-cyhalothrin, cypermethrin, esfenvalerate, tau-fluvalinate, etofenprox,...

The effects of three different pest control regimes in pear orchards (two with integrated management and one an organic farming regime) on communities arthropods were studied a two-year experiment. Insects collected stages by beating the lower branches trees. number species other taxa natural enemies increased reduction insecticide applications. A total 2,492 individuals 145 found samples from practices. most numerous groups Araneae, 44 species, Coleoptera, 42 followed Hymenoptera, 33 taxa,...

Abstract Background Failures in controlling Myzus persicae by pyrethroids and carbamates have been observed Czechia since 2018. Eleven populations collected from Czech oilseed rape fields during 2018–2021 were tested for susceptibility to 11 insecticides. The presence of a single nucleotide polymorphism (SNP) leading knockdown resistance M. was screened using allelic discriminating quantitative real‐time polymerase chain reaction (qPCR). mutations related with the detected sequencing...