| modelling population dynamics of orius laevigatus and o. albidipennis (hemiptera: anthocoridae) to optimize their use as biological control agents of frankliniella occidentalis (thysanoptera: thripidae). | orius laevigatus: (fieber) and o. albidipennis (reuter) play an important role in the control of frankliniella occidentalis (pergande) in crops and natural vegetation in the mediterranean area. the biological parameters of the two anthocorids were studied and modelled in relation to temperature to optimize their use in thrips control programmes. development times and reproductive parameters of o. laevigatus and o. albidipennis were determined at 20, 25, 30 and 35 degrees c. pre-imaginal developm ... | 2002 | 12020365 |
| prey preference, intraguild predation and population dynamics of an arthropod food web on plants. | the theory of intraguild predation (igp) largely studies effects on equilibrium densities of predators and prey, while experiments mostly concern transient dynamics. we studied the effects of an intraguild (ig) predator, the bug orius laevigatus, on the population dynamics of ig-prey, the predatory mite phytoseiulus persimilis, and a shared prey, the phytophagous two-spotted spider mite tetranychus urticae, as well as on the performance of cucumber plants in a greenhouse. the interaction of the ... | 2001 | 12455871 |
| influence of a short exposure to teflubenzuron residues on the predation of thrips by iphiseius degenerans (acari: phytoseiidae) and orius laevigatus (hemiptera: anthocoridae). | a short duration (24h) leaf-disc bioassay was used to determine the effects of teflubenzuron residues on the predation levels of two predators, iphiseius degenerans (berlese) and orius laevigatus (fieber), foraging on nymphs of two species of thrips, frankliniella occidentalis (pergande) and heliothrips haemorrhoidalis (bouche), on a range of different species of plant. teflubenzuron did cause thrips mortality during the 24-h bioassay; it was more active against h haemorrhoidalis than f occident ... | 2003 | 14620054 |
| supplemental food affects thrips predation and movement of orius laevigatus (hemiptera: anthocoridae) and neoseiulus cucumeris (acari: phytoseiidae). | two experiments were done to examine the predation of thrips, and the movement of orius laevigatus fieber and neoseiulus cucumeris (oudemans) in the presence and absence of two supplemental food sources, pollen and the fungus trichoderma viride. the presence of pollen led to a 55% reduction in predation of the thrips by n. cucumeris and a 40% reduction in thrips predation by o. laevigatus, in experiments using single predators. the presence of fungus had no significant effect on thrips predation ... | 2007 | 17524162 |
| herbivore benefits from vectoring plant virus through reduction of period of vulnerability to predation. | herbivores can profit from vectoring plant pathogens because the induced defence of plants against pathogens sometimes interferes with the induced defence of plants against herbivores. plants can also defend themselves indirectly by the action of the natural enemies of the herbivores. it is unknown whether the defence against pathogens induced in the plant also interferes with the indirect defence against herbivores mediated via the third trophic level. we previously showed that infection of pla ... | 2008 | 18392858 |
| biological performance of quercetin on the cotton leaf-worm larvae, spodoptera littoralis boisd. (lep., noctuidae) and prevailing natural enemies in the egyptian cotton fields. | the egyptian cotton (gossypium barbadense l.) accounts for 65 % of the world production of long stable cultivars. taking into consideration the competition of other cotton producing countries, it should be of great importance to control pests, which attack the cotton plants to improve the yield and its quality. the main objective of this study is to develop new approaches for the management of the cotton leafworm spodoptera littoralis boisd. within an ipm program, that include synthetic insectic ... | 2007 | 18399494 |
| field trial measuring the compatibility of methoxyfenozide and flonicamid with orius laevigatus fieber (hemiptera: anthocoridae) and amblyseius swirskii (athias-henriot) (acari: phytoseiidae) in a commercial pepper greenhouse. | frankliniella occidentalis (pergande) (thysanoptera: thripidae) and bemisia tabaci (gennadius) (hemiptera: aleyrodidae) are among the most serious pests of sweet peppers in greenhouses. chemical control is difficult because of their high reproductive rates and insecticide resistance, and seasonal inoculative releases of orius laevigatus (fieber) and amblyseius swirskii (athias-henriot) are commonly used to reduce their populations. as chemical treatments are often needed in the crop against othe ... | 2011 | 21495158 |
| impact of artificial rearing systems on the developmental and reproductive fitness of the predatory bug, orius laevigatus. | this study investigated the effect of several substrate types and moisture sources on the developmental and reproductive fitness of the zoophytophagous predator orius laevigatus (fieber) (hemiptera: anthocoridae) when fed a factitious prey (i.e. unnatural prey) ephestia kuehniella (zeller) eggs, or a meridic artificial diet based on hen's egg yolk. o. laevigatus is known to feed on plants as an alternative food source and to oviposit in plants. e. kuehniella eggs were superior to the artificial ... | 2010 | 20874391 |
| developmental and reproductive fitness of orius laevigatus (hemiptera: anthocoridae) reared on factitious and artificial diets. | the developmental and reproductive fitness of the polyphagous predator orius laevigatus (fieber) (hemiptera: anthocoridae) was compared on two factitious foods and four artificial diets. adults fed factitious foods (ephestia kuehniella zeller eggs and artemia franciscana kellogg cysts) performed better than those fed artificial diets. among the artificial diets, a diet composed of liver and ground beef scored better than meridic diets based on egg yolk. within the egg yolk-based artificial diets ... | 2008 | 18767719 |
| [four-year follow-up of a group of workers with allergic sensitization employed in breeding of insects for biological pest control]. | in two previous papers we reported allergic diseases in workers employed in breeding insects for biological pest control. it was found that ephestia kuehniella, orius laevigatus and other insects caused allergic rhinoconjunctivitis and asthma. the aim of this new study was to assess the relationship between the implementation of the recommended preventive measures and the decrease in sensitization in exposed workers. we performed a four-year follow-up of exposed workers, using the prick test and ... | 2006 | 11441589 |
| incorporation of intraguild predation into a pest management decision-making tool: the case of thrips and two pollen-feeding predators in strawberry. | action thresholds are traditionally based on the density of pests and the economic damage they cause to crops. pest damage assessments are usually made in a "sterile" environment, devoid of extenuating factors such as predators, parasitoids, and alternative food sources. recently, the effects of a predator or parasitoid species have been considered. however, interactions between natural enemy species (intraguild predation and interference), which are common in agricultural fields, have not been ... | 2010 | 20857715 |
| factors affecting the distribution of a predatory mite on greenhouse sweet pepper. | the predatory mite neoseiulus cucumeris is used for biological control of phytophagous mites and thrips on greenhouse cucumber and sweet pepper. in a previous study, n. cucumeris provided effective control of broad mite but was only rarely found on the sampled leaves, raising questions about the factors affecting n. cucumeris distribution. to determine the distribution of n. cucumeris, leaves of pepper plants were sampled three times per day: just after sunrise, at noon and just before sunset fo ... | 2007 | 17534730 |
| efficacy of commercially available invertebrate predators against drosophila suzukii. | drosophila suzukii has been recorded in the uk since the end of 2012. to date, reports of serious damage have been rare. previous research has demonstrated that there are chemicals available within the uk that are efficient in dealing with d. suzukii. however, few effective chemicals for use by the organic sector have been identified; equally the addition of "new" insecticides into previously stable ecosystems can have negative impacts upon natural enemies and so disrupt control strategies that ... | 2014 | 26462951 |
| olfactory response of the predatory bug orius laevigatus (hemiptera:anthocoridae) to the aggregation pheromone of its prey, frankliniella occidentalis (thysanoptera: thripidae). | herbivore natural enemies base their foraging decision on information cues from different trophic levels but mainly from plant odors. however, the second trophic level (i.e., the herbivorous prey) may also provide reliable infochemical cues for their natural enemies. we have evaluated the role of the aggregation pheromone from frankliniella occidentalis (pergande) as a potential kairomone for its natural enemy, the predatory bug orius laevigatus (fieber). for this purpose, we have analyzed the r ... | 2017 | 28962006 |
| context-dependent alarm signalling in an insect. | animals often respond to danger by raising alarm to inform others. alarm signals come in many different forms, such as visual or mechanical display, sound or odour. some animals produce vocal alarm signals that vary with the level of danger. for chemical alarm signals, virtually nothing is known about such context-dependent signalling due to a general notion that alarm pheromones have fixed compositions. here, we show that larvae of the western flower thrips (frankliniella occidentalis) produce ... | 2016 | 26688127 |
| diet of a polyphagous arthropod predator affects refuge seeking of its thrips prey. | antipredator behaviour of prey costs time and energy, at the expense of other activities. however, not all predators are equally dangerous to all prey; some may have switched to feeding on another prey species, making them effectively harmless. to minimize costs, prey should therefore invest in antipredator behaviour only when dangerous predators are around. to distinguish these from harmless predators, prey may use cues related to predation on conspecifics, such as odours released by a predator ... | 2000 | 11007646 |
| effect of a plant fortifier (boundary) on pests and predators of greenhouse vegetable crops. | boundary, a plant fortifier composed of extracts of sophora flavescens aiton and brown algae, was tested for control of the leaf miner tuta absoluta (meyrick) on tomato (three trials) and of the red spider mite tetranychus urticae koch on eggplant (one trial) and for side effects on the whitefly predator macrolophus pygmaeus (kambur) (two trials) on tomato and on the thrips predators orius laevigatus (fieber) and amblyseius swirskii athias-henriot (two trials) on pepper, all in cold greenhouses ... | 2015 | 25631629 |
| selectivity of diacylhydrazine insecticides to the predatory bug orius laevigatus: in vivo and modelling/docking experiments. | knowledge of pesticide selectivity to natural enemies is necessary for a successful implementation of biological and chemical control methods in integrated pest management (ipm) programmes. diacylhydrazine (dah)-based ecdysone agonists, also known as moulting-accelerating compounds (macs), are considered to be a selective group of insecticides, and their compatibility with predatory heteroptera, which are used as biological control agents, is known. however, their molecular mode of action has no ... | 2012 | 22761153 |
| using organic-certified rather than synthetic pesticides may not be safer for biological control agents: selectivity and side effects of 14 pesticides on the predator orius laevigatus. | the generalist predator orius laevigatus (fieber) (hemiptera: anthocoridae) is a key natural enemy of various arthropods in agricultural and natural ecosystems. releases of this predator are frequently carried out, and it is included in the integrated pest management (ipm) programs of several crops. the accurate assessment of the compatibility of various pesticides with predator activity is key for the success of this strategy. we assessed acute and sublethal toxicity of 14 pesticides on o. laev ... | 2012 | 22342338 |
| development of an oligidic diet for orius laevigatus nymphs using a deletion-addition approach. | | 2001 | 15954311 |
| preservation of an artificial diet for rearing the predator orius laevigatus. | the use of an artificial meat diet for orius laevigatus lacking antimicrobial agents, resulted in rapid contamination of the medium especially by (unidentified) bacteria when stored in the rearing cages at 23 degrees c. meat spoilage was detrimental for the insect and negatively affected the developmental parameters depending on the time between two feeding intervals. two antibiotics (chortetracycline and gentamycin sulfate) were screened for their potential to extend the shelf life of the diet. ... | 2002 | 12696413 |