Impact of low temperature and host plant on Tuta absoluta Campos, Mateus R.; Amiens‐Desneux, Edwige; Béarez, Philippe ...
Entomologia experimentalis et applicata,
November 2021, 2021-11-00, 20211101, Letnik:
169, Številka:
11
Journal Article
Recenzirano
Alternative host plants are among the key factors influencing the spread of invasive pests because they are utilized as a food source and provide shelter in unfavorable conditions. The South American ...tomato pinworm (SATP), Tuta absoluta Meyrick (Lepidoptera: Gelechiidae), has a high behavioral and physiological plasticity enabling it to rapidly spread in several countries. Among the multiple strategies used by SATP in the invasion process is the use of alternative host plants including black nightshade (BNS), Solanum nigrum L. (Solanaceae), a perennial plant widely distributed across all habitats worldwide. Besides the life table and behavioral parameters of SATP on tomato, its survival and reproduction in low temperatures on alternative host plants should be assessed to evaluate the likely spread in temperate regions with harsh winters. In our study, comparing solanaceous species through generations, the primary difference was in the mean generation time with SATP reared on BNS, whereby it had a longer development time than larvae and pupae reared on tomato plants. Adults preferred tomato plants even if they had been reared as larvae on BNS. Exposure periods of 7, 14, and 21 days to 4 °C indicated that more than 50% of SATP pupae reared on BNS plants survived more than 14 days. The survival of SATP reared on tomato plants exceeded 21 days and after exposure to 4 °C, females reared on both plants remained fertile. The life table and behavioral parameters recorded demonstrated a significant potential of BNS to support the development of SATP, also at low temperature. Therefore, even with effective border surveillance and phytosanitation processes in place, invasion through an alternative host is possible and difficult to detect.
Tuta absoluta (Lepidoptera: Gelechiidae) is an oligophagous pest primarily of tomato plants. However, it can develop on black nightshade, Solanum nigrum (Solanaceae), an alternative host plant that occurs spontaneously in all continents. Age‐stage life table analysis of T. absoluta revealed oviposition preference behavior of females. Additionally, the survival of pupae at low temperature (4 °C) indicated this pest feeds on both host plants and black nightshade has a high potential for T. absoluta development and reproduction.
Recent evidence suggests the existence of Pre-Hispanic fisheries in savanna areas of the Amazon basin. How these fisheries may have functioned is still poorly known. Although many studies have drawn ...attention to how Pre-Hispanic inhabitants of these savannas managed to deal with excess water, little attention has been paid to understanding how large and permanent populations were sustained during long periods of drought. In the Llanos de Mojos, one of the largest savannas in South America, the landscape is greatly affected by the impacts of annual, seasonal flooding and inundations, alternating with a dry period that can last 4-6 months. The fishing practices in this area were studied on the basis of analysis of more than 17,000 fish remains recovered at Loma Salvatierra, a monumental mound located in an interfluvial area 50 km from the Mamoré River and occupied between 500 and 1400 AD. In Loma Salvatierra, a network of circular walled ponds connected to a system of canals has been identified, raising questions about a possible use of these structures for fishing. The exceptional conservation of the bone material has enabled precise taxonomic identification of more than 35 taxa, the richest fish spectrum thus far documented in the Mojos region. The dominant fish, swamp-eels (Synbranchus spp.), armored catfishes (Hoplosternum spp.), lungfish (Lepidosiren paradoxa), and tiger-fish (Hoplias malabaricus) are characteristic of shallow and stagnant waters. Our work documents the first zooarchaeological evidence of a dryland, interfluvial fishing system in the Bolivian Amazon that incorporates distinct species and fishing practices, demonstrating that these regions contain year round resources. Research is taking its first steps toward understanding landscape modifications, fish environments, and specific cultural technologies employed on this and other lowland neotropical savannas that differ from those for fishing in open waters and rivers.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Neanderthal behavior is often described in one of two contradictory ways: 1) Neanderthals were behaviorally inflexible and specialized in large game hunting or 2) Neanderthals exhibited a wide range ...of behaviors and exploited a wide range of resources including plants and small, fast game. Using stone tool residue analysis with supporting information from zooarchaeology, we provide evidence that at the Abri du Maras, Ardèche, France, Neanderthals were behaviorally flexible at the beginning of MIS 4. Here, Neanderthals exploited a wide range of resources including large mammals, fish, ducks, raptors, rabbits, mushrooms, plants, and wood. Twisted fibers on stone tools provide evidence of making string or cordage. Using a variety of lines of evidence, we show the presence of stone projectile tips, possibly used in complex projectile technology. This evidence shows a level of behavioral variability that is often denied to Neanderthals. Furthermore, it sheds light on perishable materials and resources that are not often recovered which should be considered more fully in reconstructions of Neanderthal behavior.
•Neanderthals at the Abri du Maras captured fish, birds and rabbits.•Six lithic points suggest use of complex projectile technology.•Twisted fibers suggest the manufacture of cordage.
The Atacama Desert coast (18–30° S) presents one of the earliest chronologies in the South America region, whose first occupations date from ~ 13,000 cal BP. Since that time, coastal and marine ...resources have been a common component at sites along the littoral zone. Fish species have been particularly important, as have the fishing technologies developed and used by the coastal communities. However, even though several archaeological sites have been studied, there is no systematic macro-regional analysis of early fisheries along the Atacama Desert coast. Furthermore, differences in theoretical and methodological approaches, as well as research objectives, hinder comparisons between ichthyoarchaeological assemblages. Here, we present a comparative analysis of the Atacama Desert fish data obtained from publications and gray literature from ten archaeological sites dating from the Terminal Pleistocene to the Early Holocene. Through the standardization of contextual and ichthyoarchaeological information, we compared data using NISP, MNI, and weight to calculate fish density, richness, and ubiquity, in order to identify similarities and differences between assemblages. This exploratory approach aims to contribute to studies of fish consumption in the area, as well as proposing new methodological questions and solutions regarding data heterogeneity in archaeozoology.
Between 2006 and 2013, the island of Tromelin (Indian Ocean) was surveyed and excavated within the framework of the UNESCO project “Forgotten Slaves.” Archaeozoological studies evidenced the survival ...behaviours and subsistence strategies implemented by the l'Utile shipwreck victims abandoned on the island between 1761 and 1776. The ichthyoarchaeological analysis of 4,282 fish bones resulted in the identification of individuals belonging to 24 families of Teleostei and Chondrichthyes, among which Carangidae (jacks) largely dominate, followed by Serranidae (groupers), Acanthuridae (surgeonfishes), Balistidae (triggerfishes), Lutjanidae (snappers), and Pomacentridae (damselfishes). All of the cranial and postcranial elements were examined, and the taxonomic determination led to genus and species level attributions whenever possible. The composition of the assemblage, the ecology of the taxa, the nature of the nearby marine biotopes, and the fishing gear unearthed on the site provided helpful data to characterise the probable fishing techniques used by the survivors. Although line fishing along the drop‐off and offshore with a watercraft might have been practiced widely by the Malagasy slaves, spearing and/or harpooning on the sandbank and coral reef, as well as hand gathering in the tidal pools off the reef flat surrounding the island, could also have greatly contributed to the overall catch. The results of this study reveal that this broad‐spectrum exploitation of marine resources was opportunist, though it required skill and knowledge. They also shed light on the adaptation of the castaways to survive extreme conditions.
Long considered on the margins, far from the major cultural traditions, the Sechura Desert is situated at the crossroads between the cultures of southern Ecuador and those of the northern Peruvian ...coast and preserves a large number of varied archaeological sites. Despite this evidence, little is known about the societies that inhabited this region during the Holocene. Exposed to natural hazards, including El Niño events, and to major climatic changes, they were able to adapt and exploit the scarce resources that this extreme environment offered them. Because of this rich history, we have been conducting archaeological research in this region since 2012 in order to clarify the dynamics of human occupation and their links with climate oscillations and environmental changes. This paper present the results of a multidisciplinary study of Huaca Grande, a mound located on Nunura Bay, 300 m from the Pacific Ocean. The nature of the human occupations at Huaca Grande was varied, and several adjustments occurred over time. The subsistence economy was based mainly on local marine resources and a continual use of terrestrial vegetal resources. However, a major change occurred in the more recent occupations, with the apparition of non-local resources (maize and cotton) indicating that Huaca Grande was connected to trade networks. The results show two main phases of occupation separated by a long abandonment (mid-5th century CE to mid-7th century CE and mid-13th century to mid-15th century CE). The occupation of the site appears to have been influenced by changes in the local climate and by extreme El Niño events. Our results highlight the great adaptability of these human groups over the span of a millennium and their capacity to react to the climatic changes and hazards that characterise this region.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
This article reports on new archaeological data obtained in 2018 from the coastal region of the Kongo Central province of the Democratic Republic of Congo (DRC). The area’s ancient history is ...virtually unknown but is potentially of paramount importance in the context of the development of early village communities in Central Africa. The article focuses on the Muanda 6 site, dated to ⁓ 1400 BP, and offers a multidisciplinary analysis of the finds uncovered there. The site’s pottery is associated with shell and stone beads, ironworking remains, a stone quern, and biological remains testifying to a mixed subsistence system that took advantage of the region’s ecological diversity. The Early Iron Age occupants of Muanda 6 practiced ocean and mangrove fishing, gathered beach and mangrove gastropods and bivalves, hunted, and exploited oil palms. The article also discusses the Muanda 13 site, which is more recent (⁓ 1100 BP), and the results of the profile sampling at the Katala village. Both Muanda 6 and Muanda 13 yielded different ceramic types. Other pottery styles, surface collected between the Congo River and the Angolan province of Cabinda and probably of more recent date, are briefly described. The results provide new perspectives about the Iron Age in the DRC, providing further evidence of the cultural diversity in the Lower Congo region and an outline of the cultural sequence along the Atlantic Ocean coast.
Résumé
Cet article rend compte de nouvelles données archéologiques obtenues en 2018 dans la région côtière de la Province du Kongo-Central en République démocratique du Congo. L’histoire ancienne de cette région est pratiquement inconnue, mais elle est potentiellement d'une importance capitale dans le contexte de l'installation des premiers villages en Afrique centrale. Les travaux se concentrent sur le site de Muanda 6, daté vers 1400 BP, dont les trouvailles sont étudiées dans une perspective multidisciplinaire. La poterie de ce site est associée à des perles de coquillages et de pierre, à des traces de travail du fer, et à une meule en pierre ainsi qu'à des restes biologiques témoignant d'un système de subsistance mixte reposant sur divers écotones. Les occupants de l’Age du Fer Ancien de Muanda 6 pratiquaient la pêche en mer et dans la mangrove, la collecte de gastéropodes et de bivalves sur la plage et dans la mangrove, la chasse et l'exploitation des palmiers à huile. Le site plus récent de Muanda 13 (vers 1100 BP), ainsi qu’une collecte stratigraphique dans la berge du village de Katala, ont permis de découvrir un autre type de céramique. L’article décrit un dernier style de poterie probablement plus récent et découvert en surface entre le fleuve Congo et la frontière de la province angolaise de Cabinda. Les résultats présentés ici offrent de nouvelles perspectives à l’Age du Fer sur la diversité culturelle dans la région du Bas-Congo et propose l’esquisse d’une séquence culturelle au long de la côte de l’Océan Atlantique.
The emergence of specialized fishers is often considered one of the most distinguishing traits of the Middle Holocene (ca. 8000–6000 cal BP) in the hyperarid Southern Atacama coast. Most of the ...evidence comes from funerary contexts and artifact typologies, but there are very few systematic zooarchaeological studies from which to understand this process. Considering the importance of marine and coastal resources for communities who inhabited this area in terms of subsistence and social organization, in this paper we analyze ichthyoarchaeological evidence from the Zapatero site (Antofagasta region of Chile), one of the most important Middle Holocene sites of the Taltal area. Our evidence shows a specialized maritime adaptation based on the exploitation of different fish resources from the area, but at the same time an important intensification in the harvesting of one specific taxon, the jack mackerel Trachurus murphyi. Through this systematic ichthyoarchaeological analysis, we reflect on the historical process of adaptation of local communities to the driest coastal desert in the world.
A considerable body of evidence has demonstrated the positive impact of the diversity of plant species on biological control of pests at the field scale. However, very few studies have assessed the ...effect of crop diversity on natural enemy performance and pest control. In order to test our hypothesis that crop diversity could increase natural enemy development and performance, we examined the mechanisms underlying the effect of two types of crop succession, i.e., multiple-crop succession (tomato, squash and soybean) and mono-crop succession (each crop alone), on population dynamics, predation capacity and spillover of
Nesidiocoris tenuis
Reuter (Hemiptera: Miridae) in a greenhouse experiment. We found that (1) the polyculture supported lower population growth of
N. tenuis
and lower predation rates of
Ephestia kuehniella
Zeller (Lepidoptera: Pyralidae) eggs compared to tomato and squash monocultures, but that correspondingly (2) the predator performed better on the polyculture than on the soybean monoculture. These results revealed that crop identity within the succession is a major factor in determining population dynamics and biological control. We found that compared to soybean monoculture, the presence of soybean
Glycine max
L. (Fabales: Fabaceae) in the polyculture treatment reduced the population dynamics of the mirid predator but increased biological control. This result suggests that non-host crops in a polycultural succession could benefit from the natural enemy populations that were increased by other suitable crops in the succession.
The presence of emperor fishes has been reported in several archaeo‐ichthyological studies in Eastern Arabia. The spangled emperor (Lethrinus nebulosus) is one of the main species currently composing ...annual landings in the central and southern Persian Gulf. Its presence outlines the importance of the coastal environments exploited during different life cycle stages, such as open‐water reefs and sheltered embayments, including grass beds. Osteometrical methods for estimating the life‐size from bones were developed during the last few decades. Measurements taken from the bones of 32 fresh spangled emperors, collected from a fish market in Umm al‐Quwain (United Arab Emirates) in February 2017, were exploited to calculate regression equations (power fits), allowing size estimations from archaeological remains. Because of the difficulties in identifying emperor species using bones, we also tested and discussed the validity of a generic model.
The Neolithic site of Akab has provided more than 37,000 fish remains, mostly belonging to kawakawa tunas, trevallies, and seabreams, which suggest that fishing was essentially carried out during the winter. Relatively few bones (totalling 100 measurements) were identified as belonging to spangled emperors. However, because of the ecological features of this species, estimated sizes permitted investigations into which fishing grounds were exploited, and even provided new evidence regarding ancient seasonality of coastal occupation in Eastern Arabia.
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