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  • Articles  (199)
  • Coleoptera  (120)
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  • Articles  (199)
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  • 2020-2022
  • 1990-1994  (199)
  • 1960-1964
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  • 1
    Electronic Resource
    Electronic Resource
    Evaluation of artificial diets and two species of natural prey as laboratory food forChilocorus spp. (1993)
    Springer
    Entomologia experimentalis et applicata 69 (1993), S. 13-20 
    Details
    ISSN: 1570-7458
    Keywords: Artificial diets ; Coccinellidae ; rearing ; biological control ; Chilocorus spp. ; Coleoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Promising diets were screened and the most successful modified with additives used in artificial diets for other entomophagous insects. Two suitable diets were obtained, one for adults and one for larvae ofChilocorus nigritus (Fabricius) (Coleoptera: Coccinellidae). They were still inferior to natural prey and not adequate as the sole food source for rearing consecutive generations. They are valuable as substitute food in the insectary during shortages of natural prey. Oleander scaleAspidiotus nerii Bouché andAsterolecanium miliaris (Boisduval) were evaluated as natural prey forC. nigritus and two other potential biocontrol agents in southern Africa,C. bipustulatus (Linnaeus) andC. infernalis Mulsant.A. nerii andA. miliaris were suitable for all life stages ofC. nigritus and adults ofC. bipustulatus andC. infernalis. A. miliaris was inadequate for larvae ofC. bipustulatus andC. infernalis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380669
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  • 2
    Electronic Resource
    Electronic Resource
    On the function of pea flower feeding by Bruchus pisorum (1992)
    Springer
    Entomologia experimentalis et applicata 63 (1992), S. 115-121 
    Details
    ISSN: 1570-7458
    Keywords: Pea weevil ; Bruchus pisorum ; Bruchidae ; Coleoptera ; flower feeding ; nectar robbing ; pea ; Pisum sativum ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pea flower feeding by adult pea weevils, Bruchus pisorum (L.) (Coleoptera: Bruchidae), with special emphasis on nectar feeding, was investigated in a series of laboratory experiments. Male and female adults robbed nectar from flowers of the garden and field pea, Pisum sativum L., and females which fed on the nectar, petals, and female organs of pea flowers lived significantly longer than those denied food and water and those that fed on water only. The results of other experiments suggested that pea flower qualities other than pollen influenced the reproductive success of female B. pisorum. It is hypothesized that pollen seeking B. pisorum effected cross-pollination in the wild progenitor of the modern-day autogamous pea, and adult pea weevils of both sexes rob pea nectar to obtain a readily available source of energy to sustain flight.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00343571
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  • 3
    Electronic Resource
    Electronic Resource
    Host plant recognition in monophagous weevils: Specialization ofCeutorhynchus inaffectatus to glucosinolates from its host plantHesperis matronalis (1992)
    Springer
    Entomologia experimentalis et applicata 64 (1992), S. 49-55 
    Details
    ISSN: 1570-7458
    Keywords: Ceutorhynchus inaffectatus ; Coleoptera ; Curculionidae ; Hesperis matronalis ; Dame's violet ; Brassicaceae ; Cruciferae ; glucosinolates ; feeding stimulants ; host plant specificity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ceutorhynchus inaffectatus Gyllenhal (Coleoptera: Curculionidae:Ceutorhynchinae) is a monophagous species feeding only onHesperis matronalis L. (Cruciferae) in North-western Europe. Feeding responses of this weevil to five glucosinolates from its host plant were compared with the responses to four glucosinolates from non-host plants. The major glucosinolates in the host plant were isolated and identified: 6-methylsulphinylhexylglucosinolate (glucohesperalin), 3,4-dihydroxybenzylglucosinolate (glucomatronalin), 3-O-apiosylglucomatronalin, a 3,4-dihydroxybenzoylester and a 3,4-dimethoxybenzoylester of 3-O-apiosylglucomatronalin. The three glucosinolates containing apiose were powerful feeding stimulants forC. inaffectatus while the other host plant compounds and allyglucosinolate (sinigrin), 3-methylsulphinylpropylglucosinolate (glucoiberin), benzylglucosinolate (glucotropaeolin) and p-hydroxybenzylglucosinolate (sinalbin) were weaker stimulants. The role of glucosinolates in host plant selection ofC. inaffectatus and related monophagous crucifer feeders is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688993
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  • 4
    Electronic Resource
    Electronic Resource
    Optimization of bioassay conditions for the olive bark beetle Phloeotribus scarabaeoides (1992)
    Springer
    Entomologia experimentalis et applicata 63 (1992), S. 81-86 
    Details
    ISSN: 1570-7458
    Keywords: Laboratory bioassay ; olfactometer ; olive bark beetle ; Phloeotribus scarabaeoides ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Bioassay conditions with a glass olfactometer for the olive bark beetle, Phloeotribus scarabaeoides Bern. (Coleoptera: Scolytidae), have been investigated. The best temperatures and light intensities were between 17 and 28° C and 1000 and 1500 lux, respectively. The best response was obtained with newly emerged individuals from reproduction galleries with no feeding period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00350349
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  • 5
    Electronic Resource
    Electronic Resource
    Diet, fecundity and egg size in some polyphagous predatory carabid beetles (1992)
    Springer
    Entomologia experimentalis et applicata 65 (1992), S. 129-140 
    Details
    ISSN: 1570-7458
    Keywords: Coleoptera ; Carabidae ; Bembidion lampros ; Pterostichus cupreus ; P. melanarius ; diet ; egg production ; egg size variation ; pirimicarb ; fat reserves
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Egg size was measured at different rates of egg laying in three polyphagous carabid species, known to be useful predators of cereal aphids; the small Bembidion lampros Herbst and the medium-sized Pterostichus cupreus L. and P. melanarius Illiger. Variations in fecundity, as well as the ability of the medium-sized species to also build up fat reserves, were obtained when beetles were subjected to different dietary regimes consisting of aphids, or foods with a lower or higher protein content. Egg size was found to be dependent on the rate of egg laying within a species. A diet of cereal aphids appeared to be adequate for egg production in these polyphagous carabids, but female P. cupreus were unable to build up fat reserves when they ingested aphids contaminated with the aphicide pirimicarb. Beetles were able to devote resources to more and larger eggs (B. lampros), or to larger eggs and/or fat reserves (P. melanarius/P. cupreus) when given access to a carbohydrate-rich food with low protein content. The highest rate of egg laying was obtained when female P. cupreus and P. melanarius were given a more varied diet at frequent intervals; including regular shifts between unsprayed aphids, carbohydrate-rich food and protein-rich maggots. Within the varied diet treatment a negative relationship was obtained between egg size and egg number among similar-sized individuals of P. cupreus and P. melanarius; females producing the largest number also laid the smallest eggs. Egg size affected larval survival, since first instars hatching from large eggs were found to survive longer than those hatching from small eggs. The influence of differences in food intake on reproduction, maintenance metabolism, and survival of fieldinhabiting carabids is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221363
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  • 6
    Electronic Resource
    Electronic Resource
    Spatial distribution and sequential sampling of adults ofGonocephalum macleayi andPterohelaeus darlingensis in different cropping regimes (1992)
    Springer
    Entomologia experimentalis et applicata 65 (1992), S. 235-240 
    Details
    ISSN: 1570-7458
    Keywords: Coleoptera ; Tenebrionidae ; Pterohelaeus darlingensis ; Gonocephalum macleayi ; false wireworms ; sampling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Counts of adults of the false wirewormsGonocephalum macleayi (Blackburn) andPterohelaeus darlingensis Carter in pitfall traps in burnt, mulched and sorghum treatments conformed to Taylor's power law. Within a species there were no significant differences in distributions of counts of either sex in any habitat butG. macleayi were more aggregated thanP. darlingensis (Taylor'sb 1.35 and 1.26, respectively). Relationships to determine sample sizes for fixed levels of precision and fixed-precision-level stop lines for sequential sampling are developed for each species using Taylor's parameters for combined data over all habitats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02343856
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  • 7
    Electronic Resource
    Electronic Resource
    Genetic structure of leaf-beetles populations: microgeographic and sexual differentiation inOreina cacaliae andO. speciosissima (1992)
    Springer
    Entomologia experimentalis et applicata 65 (1992), S. 247-257 
    Details
    ISSN: 1570-7458
    Keywords: Population genetics ; microgeographic differentiation ; leaf-beetles ; Chrysomelinae ; Coleoptera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We usedF-statistics to quantify the population structure of two sympatric species of leaf beetles,Oreina cacaliae andO. speciosissima (Chrysomelinae, Coleoptera), which share the same microhabitat since they feed on the same herbaceous host plants. We measured genetic differentiation at six allozyme loci 1) among populations separated by relatively small distances (40 to 250 kilometers), 2) within each population, and 3) between sexes within populations. For both species, the populations studied are not panmictic. For each population, heterozygosities are relatively high, but the observed heterozygosities are generally lower than the expected values. Overall, within-population differentiation is high and similar for both species (F is=0.326 forO. cacaliae and 0.332 forO. speciosissima). Additionally, populations of both species are highly differentiated (F st=0.234 versus 0.051 forO. speciosissima). ForO. cacaliae,F is andF st are greater among females than among males, while forO. speciosissima,F st is sustantially greater among the males whileF is is slightly greater among males. Differences in gene frequency among the sexes were statistically tested using a modifiedF st with sex as the defining category, and the sexes differed significantly with the exception of one population inO. cacaliae. Possible explanations for this difference are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02343858
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  • 8
    Electronic Resource
    Electronic Resource
    The behaviour of 9 stored product beetles at pitfall trap arenas and their capture in millet (1993)
    Springer
    Entomologia experimentalis et applicata 66 (1993), S. 161-169 
    Details
    ISSN: 1570-7458
    Keywords: avoidance behaviour ; capture efficiency ; Coleoptera ; time-lapse video ; visual recording
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pitfall trap capture forSitophilus oryzae (L.),S. zeamais (Motschulsky),S. granarius (L.),Tribolium confusum (Duval),T. castaneum (Herbst);Oryzaephilus surinamensis (L.),Cryptolestes pusillus (Schonherr),Rhyzopertha dominica (Fabr.), andProstephanus truncatus (Horn) in millet was assessed by visual and time-lapse video recordings. The behaviour of different beetle species in arenas containing millet was monitored over 24 h and the frequency of encounters with the trap rim resulting in capture recorded. The capture efficiency of four types of pitfall traps (i.e. polystyrene, polythene, glass and tin-plated steel can) with rims exposed or submerged below the millet surface level were compared. Capture was related to beetle size, locomotory rate, and beetle behaviour at the trap rim as well as trap design and placement. The lighter and smaller species were least captured. Glass jars were more effective than plastic and metal containers. Traps placed with their rims submerged below the grain surface level were more efficient than those with rims exposed. Capture rate was unrelated to trap size. The frequency of encounters with trap rims was not correlated with capture rate. Three types of avoidance behaviours at the trap rims i.e. probing, skirting and spontaneous retreat, were related to capture rate, spontaneous retreat being the most effective escape mechanism and probing least.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382285
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  • 9
    Electronic Resource
    Electronic Resource
    Intraspecific variation in bionomic characters of the Mexican bean weevil, Zabrotes subfasciatus (1992)
    Springer
    Entomologia experimentalis et applicata 65 (1992), S. 39-47 
    Details
    ISSN: 1570-7458
    Keywords: Development ; fecundity ; geographical variation ; Coleoptera ; Bruchidae ; ecology ; Phaseolus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Zabrotes subfasciatus (Boheman) (Coleoptera:Bruchidae) is native to parts of Central and South America but has now been spread to many others areas. It commonly infests the seeds of both Lima beans, Phaseolus lunatus, and common beans, Phaseolus vulgaris. Five geographic populations were found to differ in fecundity, patterns of egg distribution, times of development and adult sizes when they were kept under the same conditions. Each population also differed unpredictably from the others in its response to different cultivars of host seed. These differences have been shown to be of considerable importance in determining the potential pest status of the populations and should also promote caution in making predictions about the responses of different populations to new cultivars of bean for agricultural use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189715
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  • 10
    Electronic Resource
    Electronic Resource
    Distribution of overwintering Colorado potato beetle in and near Massachusetts potato fields (1993)
    Springer
    Entomologia experimentalis et applicata 66 (1993), S. 191-196 
    Details
    ISSN: 1570-7458
    Keywords: Leptinotarsa decemlineata (Say) ; Coleoptera ; Chrysomelidae ; distribution ; diapause ; overwintering ; mortality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382289
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