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Neotropical Entomology

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https://www.readbyqxmd.com/read/30238336/two-new-species-of-the-spittlebug-genus-ocoaxo-fennah-hemiptera-cercopidae-from-mexico-and-keys-for-the-groups-group-three-and-first-subgroup
#1
U Castro-Valderrama, G S Carvalho, D C Peck, J M Valdez-Carrasco, J Romero Nápoles
Insects of the family Cercopidae are known as spittlebugs or froghoppers and are represented by 62 genera in the Neotropical region. One of these genera is Ocoaxo Fennah, 1968 with 30 species. The most recent species to be accepted into this genus, Ocoaxo costaricanus, was described by Nast (Ann Zool 33:93-101, 1975). Herein, two new species of Ocoaxo from Mexico are described. One of these new species forms a complex together with Ocoaxo assimilis (Walker) and Ocoaxo varians (Stål). The complex has economic importance in the mountainous areas of the states of Puebla and Oaxaca because it attacks Pinus spp...
September 20, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30229531/contribution-to-the-species-of-oxyligyrus-arrow-coleoptera-melolonthidae-of-the-peruanus-species-group-with-the-description-of-two-new-species
#2
J S Pinto-Júnior, P C Grossi
Two new species of the genus Oxyligyrus Arrow, 1908 from the peruanus species group are described from Brazil and compared with other species of the genus Oxyligyrus limeirai sp. nov., from Maranhão state and Oxyligyrus vazdemelloi sp. nov. from Mato Grosso state. A key to the peruanus complex and a distribution map of their known brazilian localities is also provided. New state records from Brazil are also presented for Oxyligyrus zoilus (Olivier 1789) the most widespread species of the genus and for O. acutus Endrödi, 1966...
September 18, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30191403/ants-do-not-traverse-the-silk-of-adult-female-nephila-clavipes-linnaeus-webs
#3
E D Knowlton, A Kamath
Many organisms use chemicals to deter enemies. Some spiders can modify the composition of their silk to deter predators from climbing onto their webs. The Malaysian golden orb-weaver Nephila antipodiana (Walckenaer) produces silk containing an alkaloid (2-pyrrolidinone) that functions as a defense against ant invasion-ants avoid silk containing this chemical. In the present study, we test the generality of ants' silk avoidance behavior in the field. We introduced three ant species to the orb webs of Nephila clavipes (Linnaeus) in the tropical rainforest of La Selva, Costa Rica...
September 6, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30182220/a-new-species-of-szeptyckitheca-collembola-symphypleona-sphyrothecinae-from-brazil
#4
D Zeppelini, B C H Lopes, E C A Lima
A new species of the genus Szeptyckitheca is described from the Biological Reserve of Serra do Japi, São Paulo State, Brazil. All species of the genus present trochanteral spine on the first and third legs, cephalic chaeta A1 often absent. The presence of spine in all trochanters, chaetal row F in head, and abdominal and antennal segments with long bristles with capitate apex are relevant features that distinguishes the new species from all known species of the genus. A key to the identification of the species of Szeptyckitheca is presented...
September 4, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30168012/lethal-and-sublethal-toxicity-of-insecticides-to-the-lacewing-ceraeochrysa-cubana
#5
G R Rugno, O Z Zanardi, J R P Parra, P T Yamamoto
The lethal and sublethal effects of 11 insecticides on the predator Ceraeochrysa cubana (Hagen) were assessed under laboratory conditions. First-instar larvae and adults ≤ 48 h old were sprayed with the highest insecticides doses allowed to control Diaphorina citri Kuwayama in the citrus crop. The survival and duration rates of the different development stages, sex ratio, pre-oviposition period, fecundity, and fertility of the insects were evaluated. In the larval bioassay, chlorpyrifos and malathion had lethal effect which none larvae survived...
August 31, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30151672/olive-leaf-extracts-toxicity-to-the-migratory-locust-locusta-migratoria-histopathological-effects-on-the-alimentary-canal-and-acetylcholinesterase-and-glutathione-s-transferases-activity
#6
K Abdellaoui, O Boussadia, M Miladi, I Boughattas, G Omri, M Mhafdhi, M Hazzoug, F Acheuk, M Brahem
The migratory locust, Locusta migratoria (Linnaeus), is the most widespread locust species. Frequent applications of insecticides have inevitably resulted in environmental pollution and development of resistance in some natural populations of the locust. To find a new and safe alternative to conventional insecticides, experiments were conducted to assess the effect of olive leaf extracts on L. migratoria fifth instar larvae. The methanolic extracts were prepared from the leaves sampled during four phenological growth stages of olive tree which are as follows: Cluster formation (Cf), Swelling inflorescence buds (Sib), Full flowering (Ff), and Endocarp hardening (Eh)...
August 27, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30141120/ants-response-to-human-induced-disturbance-in-a-rain-tropical-forest
#7
B Walter, A Graclik, P Tryjanowski, O Wasielewski
A high rate of human-induced disturbance of tropical ecosystems results in enormous loss of biodiversity due to local extinctions. Yet, mechanisms at the population level that lead to the extinction are still poorly understood. Here we tested the hypothesis that human-induced disturbance results in smaller amount of nesting sites for wood-dwelling arthropods that leads to smaller population size and diminished reproduction, and therefore, may promote local extinctions. We completed censuses in less-disturbed and human-disturbed secondary rain forest plots in Puerto Rico...
August 23, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30136041/a-new-species-of-vindex-kaup-coleoptera-scarabaeoidea-passalidae-passalinae-proculini-from-oaxaca-mexico
#8
E R Ariza-Marín, P Reyes-Castillo, V Moctezuma, J L Sánchez-Huerta
Vindex chimalapensis Ariza-Marín, Reyes-Castillo, Moctezuma & Sánchez-Huerta, a new species, is described from the cloud forest in Oaxaca, México. Vindex chimalapensis is like V. sculptilis Bates in the form of lateral elytral punctures and glabrous epipleura, but has dorsal punctures in the pronotum and the form of the aedeagus differs on the basal piece. Male genitalia, female genitalia, and head are shown in photographs. Vindex chimalapensis is the only species known from this genus with dorsal punctures on the pronotum...
August 22, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30094633/does-distance-among-colonies-and-resource-availability-explain-the-intercolonial-aggressiveness-in-nasutitermes-aff-coxipoensis
#9
D V Ferreira, J J M Sacramento, M L C Rocha, J S Cruz, D L Santana, P F Cristaldo, A P A Araújo
Aggressive behaviour can ensure animal access to local resources. To reduce constant costs in the defence of territories, species could save energy with conflicts avoiding aggression with neighbour or in situations with abundance of resources. In the present study, we analysed the effect of distance among colonies and resource availability on the aggression level and responses to chemical cues of Nasutitermes aff. coxipoensis (Holmgren) (Termitidae: Nasutitermitinae). Manipulation of resource offer was conducted in the field, where nests with different distances were kept without addition of baits (control), with addition of three or 16 sugarcane baits/nest...
August 9, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30066276/potential-effects-of-future-climate-changes-on-brazilian-cool-adapted-stoneflies-insecta-plecoptera
#10
D P Silva, A C Dias, L S Lecci, J Simião-Ferreira
The continuous pursuit of welfare and economic development through the exploitation of natural resources by human societies consequently resulted in the ongoing process of climate change. Changes in the distribution of species towards the planet's poles and mountain tops are some of the expected to biological consequences of this process. Here, we assessed the potential effects of future climate change on four cool-adapted Gripopterygidae (Insecta: Plecoptera) species [Gripopteryx garbei Navás 1936, G. cancellata (Pictet 1841), Tupiperla gracilis (Burmeister 1839), and T...
July 31, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30051261/temperature-thresholds-and-thermal-requirements-for-development-and-survival-of-dysmicoccus-brevipes-hemiptera-pseudococcidae-on-table-grapes
#11
A Bertin, S Lerin, M Botton, J R P Parra
Temperature is an important climate factor that has a direct influence on insect biology and consequently a crucial role in forecasting and integrated pest management. The mealybug Dysmicoccus brevipes (Cockerell) (Hemiptera: Pseudococcidae) is one of the most common species in Brazilian vineyards. Here, development and survival of D. brevipes on leaves of table grapes (Vitis vinifera cv. Itália) were studied at five constant temperatures (15, 20, 25, 28, and 30 ± 1°C) under laboratory conditions. We investigated the developmental time and nymphal survival, temperature thresholds, and the degree-day requirements for each life stage of D...
July 26, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30047024/best-timing-to-determine-field-parasitism-by-released-diachasmimorpha-longicaudata-hymenoptera-braconidae-against-anastrepha-diptera-tephritidae-pest-populations
#12
J Cancino, C Gálvez, A López, U Escalante, P Montoya
Our objective was to determine the timing of the highest parasitic activity by released Diachasmimorpha longicaudata (Ashmead) (Hymenoptera: Braconidae) in areas with fruits of sour orange and hog plums infested by Anastrepha ludens (Loew) and Anastrepha obliqua (McQuart) (Diptera: Tephritidae), under shaded and sunny conditions. Percent parasitism along fruit sampling period was related to host availability, which was influenced by the fruit size rather than environmental conditions. The highest parasitism in sour orange was obtained just the first day after release, but in hog plums this was observed during the first 3 days without significant differences between them...
July 25, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30039478/body-length-determines-the-diet-and-niche-specialization-of-non-biting-midge-predator-tanypodinae-larvae-in-shallow-reservoirs
#13
H H L Saulino, S Trivinho-Strixino
The functional traits of species respond to environmental gradient changes, which, in turn, are responsible for the niche specialization of species. We analyzed the niche specialization of several Tanypodinae taxa (predatory non-biting midge, 4th instar, n = 693) along the depth zones of the water in six shallow tropical reservoirs. We measured the body length and diet composition of seven Tanypodinae larvae genus. Community-weighted mean (CWM) traits index was utilized to calculate the niche distribution of body length and diet composition...
July 24, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29995283/lethal-effect-and-behavioral-responses-of-leaf-cutting-ants-to-essential-oil-of-pogostemon-cablin-lamiaceae-and-its-nanoformulation
#14
A G Rocha, B M S Oliveira, C R Melo, T S Sampaio, A F Blank, A D Lima, R S Nunes, A P A Araújo, P F Cristaldo, L Bacci
Leaf-cutting ants belonging to the genus Atta (Formicidae: Myrmicinae) are important pests in agricultural and forest environments. In the present study, we evaluated the formicidal activity of the essential oil of Pogostemon cablin and its nanoformulation on the leaf-cutting ants: Atta opaciceps (Borgmeier, 1939), Atta sexdens (Linnaeus, 1758), and Atta sexdens rubropilosa Forel, 1908. The nanoformulation was developed by magnetic stirring using polyoxyethylene (36%), pure ethanol (36%), essential oil of P...
July 11, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29982978/ants-associated-with-turnera-subulata-turneraceae-elaiosome-attraction-seed-dispersion-and-germination
#15
M L C Rocha, P F Cristaldo, J S Cruz, J J M Sacramento, D V Ferreira, A P A Araújo
Symbiosis between plants and ants include examples in which the plant provides shelter and/or food for ants that, in turn, act in the defense or in the dispersion of seeds from the host plant. Although traditionally referred as mutualistic, the results of these interactions may vary with the ecological context in which patterns are involved. A range of species have facultative association with Turnera subulata (Turneraceae). Here, using behavioral bioassays, we investigated the effects of the most frequent ant species associated with T...
July 7, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29981047/redescription-of-sibling-species-of-rhinoleucophenga-diptera-drosophilidae-r-brasiliensis-and-r-fluminensis
#16
J L Poppe, V L S Valente, M S Gottschalk
Rhinoleucophenga Hendel comprises an unusual Drosophilidae (Diptera) genus with predaceous larvae, currently compounded by 29 nominal species with New World distribution. In the present study, Rhinoleucophenga brasiliensis (Costa Lima) and R. fluminensis (Costa Lima) are redescribed. These two species are commonly misidentified in Drosophilidae species inventories, mainly by the few morphological character details presented in the original taxonomic description. Thus, by the morphological review performed here, lectotype and paralectotypes designed to R...
July 7, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29982977/scirtothrips-dorsalis-thysanoptera-thripidae-a-newly-introduced-polyphagous-pest-in-northeastern-brazil
#17
N S Dias-Pini, M G A Lima, E F B Lima, G P S Maciel, P M Duarte
We report for the first time the detection of Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) in Brazil and describe the occurrence of the thrips on leaves of ungrafted dwarf-cashew Anacardium occidentale Linnaeus 1753 (Anacardiaceae), maintained into a greenhouse, in the northeastern state of Ceará. This exotic polyphagous species listed as absent quarantine pest in the country is originated in Asia, but since the beginning of this century, it has readily dispersed despite the strict quarantine regulations currently in several countries...
October 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29728982/correction-to-determination-of-the-genetic-and-synergistic-suppression-of-a-methoxyfenozide-resistant-strain-of-the-house-fly-musca-domestica-l-diptera-muscidae
#18
R M Shah, N Abbas, S A Shad, M Binyameen
Due to an unfortunate turn of events, the surname of the last author appeared incorrectly in the original publication as the name should have read Binyameen.
October 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29679311/is-it-possible-to-manipulate-scelionidae-wasps-preference-to-a-target-host
#19
R Tognon, J Sant'Ana, L R Redaelli, A L Meyer
Parasitoid host selection is mainly mediated by chemical cues, which can be adjusted by experience, changing their innate behavior. Therefore, this study evaluated if immature experience (pre-imaginal conditioning) on eggs and volatiles from different host eggs has influence on parasitism and chemotaxic behavior of Telenomus podisi Ashmead and/or Trissolcus basalis Wollaston (Hymenoptera: Scelionidae). Both wasp species were submitted to a multiple-choice parasitism test among Euschistus heros (Fabricius), Piezodorus guildinii (Westwood), and Nezara viridula L...
October 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/29654414/determination-of-the-genetic-and-synergistic-suppression-of-a-methoxyfenozide-resistant-strain-of-the-house-fly-musca-domestica-l-diptera-muscidae
#20
R M Shah, N Abbas, S A Shad, M Binyamin
Musca domestica Linnaeus (house fly, Diptera: Muscidae) is a major veterinary and medical important pest all over the world. These flies have ability to develop resistance to insecticides. The present trial was performed to discover the inheritance mode (autosomal, dominance, number of genes involved) and preliminary mechanism of methoxyfenozide resistance in order to provide basic information necessary to develop resistance management strategy for this pest. A strain of M. domestica (MXY-SEL) was exposed to methoxyfenozide for 44 generations which developed a 5253...
October 2018: Neotropical Entomology
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