THE EFFECTS OF HIGH HUMIDITY AND DIFFERENT TEMPERATURES ON THE BIOLOGY OF TYROPHAGUS PUTRESCENTIAE (SCHRANK) (ACARINA:TYROGLIPHIDAE)

1967 ◽  
Vol 45 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Philip S. Barker
Keyword(s):  
Life Cycle ◽  
Rapid Development ◽  
Theoretical Data ◽  
Sampling Techniques ◽  
High Humidity ◽  
Immature Stages ◽  
Tyrophagus Putrescentiae ◽  
Young Culture ◽  
Different Temperatures ◽  
Reproductive Rates

The biology and reproductive rates of Tyrophagus putrescentiae have been examined for different temperatures and high humidity. The most rapid development took place at 32.2 °C, whereas 33.9 °C was slightly less favorable. A normal life cycle was accomplished at 11.2 °C. It was calculated that the major portions of populations of T putrescentiae with stable age distributions are the non-mobile stages: the eggs comprise over half of population and one-third of the immature stages are quiescent. The adults account for close to 10% of the population. These theoretical data were confirmed by the examination of a young culture. It was concluded that sampling techniques should account for the immobile stages to give a true picture of a population of this species.

Bionomics of Glycyphagus domesticus (de Geer) (Acarina: Glycyphagidae), a pest of stored grain

1968 ◽  
Vol 46 (1) ◽  
pp. 89-92 ◽  
Author(s):  
Philip S. Barker
Keyword(s):  
Life History ◽  
Relative Humidity ◽  
Rapid Development ◽  
Reproductive Rate ◽  
Optimum Temperature ◽  
Tyrophagus Putrescentiae ◽  
Stored Grain ◽  
Net Reproductive Rate ◽  
Different Temperatures ◽  
Reproductive Rates

The life history and reproductive rates of Glycyphagus domesticus (de Geer) were examined at different temperatures and two humidities. Most rapid development of the eggs occurred at 24.4 °C; the optimum temperature for the post-embryonic stages was 22.2 °C. A higher percentage of hypopi were formed at 70 to 75% than at 95 to 100% relative humidity. G. domesticus has a net reproductive rate of over 20, which was intermediate between those of Tyrophagus putrescentiae (Schrank) and Aëroglyphus robustus (Banks).

EFFECT OF HUMIDITY AND TEMPERATURE ON THE BIOLOGY OF AËROGLYPHUS ROBUSTUS (BANKS) (ACARINA: GLYCYPHAGIDAE)

1967 ◽  
Vol 45 (4) ◽  
pp. 479-483 ◽  
Author(s):  
Philip S. Barker
Keyword(s):  
Life Cycle ◽  
Relative Humidity ◽  
Different Temperatures ◽  
Reproductive Rates ◽  
Net Reproduction

The biology and reproductive rates of Aëroglyphus robustus (Banks) were examined at two humidities and different temperatures. The life cycle was shorter at 70–75% relative humidity (r.h.) than at 85–90% r.h. At 28 °C more eggs were laid at 85–90% r.h. than at 70–75% r.h. Low net reproduction rates were found for this species.

scholarly journals Biological aspects of Hylesia metapyrrha (Lepidoptera; Saturniidae; Hemileucinae), in laboratory

2007 ◽  
Vol 67 (1) ◽  
pp. 173-177 ◽  
Author(s):  
A. Specht ◽  
AC. Formentini ◽  
E. Corseuil
Keyword(s):  
Life Cycle ◽  
Incubation Period ◽  
Adult Stage ◽  
Immature Stages ◽  
Average Period ◽  
Development Stages ◽  
Behavioral Aspects ◽  
Biological Aspects ◽  
Guava Leaves

The aim of this work was to study biological aspects and the life cycle of Hylesia Metapyrrha in a laboratory. Laboratorial breeding was made at 25 ± 1 °C, 70 ± 10% UR and 14 hours of photophase, feeding the larvae with guava leaves (Psidium guayava L. - Myrtaceae). Time was evaluated on the days of all the development stages; morphometry was evaluated in millimeters and the pupa’s mass in grams. The eggs were disposed in groups and covered by urticating abdominal hair. The incubation period lasted 52 days. The larvae, with gregarious habits, presented background black coloration, yellowish scoli and two orange longitudinal lines above and below the spiracles, during the development which lasted an average period of 74.59 days and went through seven instars. The pre-pupa and the pupa stages lasted on average 8.82 and 50.56 days, respectively; the female pupae presented a duration, weight and size which was significantly bigger. The adult stage lasted on average 5.50 days with periods of pre, post and oviposition of 2.30, 1.90 and 1.00 days, respectively. This study broadens the knowledge of the immature stages, biological, morphological and behavioral aspects, until then restricted to the morphology and to registers of the occurrence of the adult forms.

THE IMMATURE STAGES OF PTYCHOPTERA LENIS LENIS (DIPTERA: PTYCHOPTERIDAE) WITH NOTES ON THEIR BIOLOGY

1973 ◽  
Vol 105 (8) ◽  
pp. 1091-1099 ◽  
Author(s):  
I. D. Hodkinson
Keyword(s):  
Life Cycle ◽  
Water Depth ◽  
Adult Stage ◽  
Atmospheric Oxygen ◽  
Adult Emergence ◽  
Fourth Instar ◽  
Immature Stages ◽  
Experimental Conditions ◽  
Marginal Areas ◽  
Pharate Adult

AbstractThe four larval instars and the pupa of Ptychoptera lenis lenis Osten Sacken are described. Instars 2 to 4 are very similar morphologically but instar 1 is markedly different. Both a pharate pupal and a pharate adult stage were observed. Larvae are found in stagnant marginal areas of ponds where water depth does not exceed 4 cm and where benthic deposits of plant detritus exceed 8 cm. Fourth instar larvae, under experimental conditions, survived up to 45 days without contact with atmospheric oxygen but development was arrested. P. lenis has a 1 year life cycle with an extended adult emergence season from late May to the end of July.

Direct Writing on Paper Substrate to Prepare Silver Electrode Structures for Flexible Sensors

2021 ◽  
Vol 21 (12) ◽  
pp. 6048-6053
Author(s):  
Qi Wang ◽  
Mingwei Li ◽  
Yao Xie ◽  
Yun Ou ◽  
Weiping Zhou
Keyword(s):  
Low Cost ◽  
Rapid Development ◽  
Silver Electrode ◽  
Silver Nanostructures ◽  
Direct Writing ◽  
Paper Substrate ◽  
Electronic Products ◽  
Glass Substrates ◽  
Different Temperatures ◽  
Writing Technology

With the rapid development of the electronics industry, electronic products based on silicon and glass substrates electronic products will gradually be unable to meet the rising demand. Flexibility, environmental protection, and low costs are important for the development of electronic products. In this study, an efficient and low-cost method for preparing silver electrode structures by direct writing on paper has been demonstrated. Based on this method, a flexible paper-based sensor was prepared. The liquid printing ink used mainly comprises a precursor liquid without pre-prepared nanomaterials. The precursor liquid is transparent with good fluidity. Simple direct writing technology was used to write on the paper substrate using the precursor ink. When the direct-writing paper substrate was subsequently heated, silver nanostructures precipitated from the precursor liquid ink onto the paper substrate. The effect of different temperatures on the formation of the silver nanostructures and the influence of different direct writing processes on the structures were studied. Finally, a paper-based flexible sensor was prepared for finger-bending signal detection. The method is simple to operate and low in cost and can be used for the preparation of environment-friendly paper-based devices.

DEEPFAKE AS A PHENOMENON OF POLITICAL COMMUNICATION

2021 ◽  
Vol 27 (6) ◽  
pp. 101-106
Author(s):  
М. Falaleev ◽  
◽  
N. Sitdikova ◽  
Е. Nechay ◽  
◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Political Communication ◽  
Political Discourse ◽  
Rapid Development ◽  
Theoretical Data ◽  
Practical Significance ◽  
Subject Field ◽  
Learning Programs ◽  
Definition Of ◽  
The Impact

The development of digital technologies, coupled with progress in the development of self-learning programs based on AI (Artificial Intelligence), has obvious advantages in improving the effectiveness of information impact on people around the world. During the 2010s, researchers have documented trends in the use of artificial intelligence for the construction and distribution of media content to indirectly manipulate political discourse at the national and global levels. Special interest in the context of this issue is how the rapid development of AI technologies affects political communication. The object of consideration within the framework of this article is the deepfake technology. Based on this, as a subject, the authors define deepfake as a phenomenon of modern political communication. Accordingly, the purpose of the study is to describe and predict the impact of deepfake technology on political communication at the global and national levels. The paper presents the definition of deepfake, assesses its characteristics depending on the methods and purposes of its distribution, and analyzes the prospects for using this tool to influence political discourse in modern Russia. To study the subject field of the research, methods of systematizing theoretical data, classification, analysis of a set of factors and forecasting have been applied. The practical significance of the work is presented by the authors’ definition and typology of the phenomenon of deepfake and describes its significance as a factor of political communication on the example of a particular country. The results of the work will be useful for researchers studying the problems of digitalization of the media space and modern means of disinformation in politics, both at the local and global levels

Description of the pupa and redescription of the third instar of Phileurus valgus (Olivier) (Coleoptera: Scarabaeidae: Dynastinae: Phileurini)

Zootaxa ◽  
2017 ◽  
Vol 4290 (3) ◽  
pp. 571
Author(s):  
MARIO G. IBARRA-POLESEL ◽  
NESTOR G. VALLE ◽  
JHON C. NEITA-MORENO ◽  
MIRYAM P. DAMBORSKY
Keyword(s):  
United States ◽  
Life Cycle ◽  
West Indies ◽  
New World ◽  
Common Species ◽  
Southern United States ◽  
Immature Stages ◽  
The West ◽  
The Third ◽  
Third Stage

Phileurus valgus (Olivier) (Coleoptera: Scarabaeidae: Dynastinae: Phileurini) is a common species widely distributed from the southern United States to Argentina and the West Indies. In this work the immature stages are described and illustrated based on specimens from Argentina. A key to the known third-stage larvae of New World Phileurini species is provided and updated. Notes on the life cycle and natural history are also included. 

scholarly journals Reproductive diapause in Nysius huttoni White (Heteroptera Lygaeidae)

2002 ◽  
Vol 55 ◽  
pp. 308-311
Author(s):  
X.Z. He ◽  
Q. Wang ◽  
A. Carpenter
Keyword(s):  
Life Cycle ◽  
Immature Stages ◽  
Life Stages ◽  
Reproductive Diapause ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Adult Females ◽  
Critical Photoperiod

The induction of reproductive diapause of Nysius huttoni was studied in the laboratory at 20 1C and 60 10 RH under a series of photoperiod regimes 168 h 1410 h 1212 h and 1014 h lightdark Reproductive diapause was considered to have occurred if females failed to lay eggs for 50 days after emergence The sensitivity of different life stages to diapauseinducing photoperiods varied When newly emerged females whose immature stages had been reared at 168 h were transferred to 1014 h and 1212 h 467 and 793 of them entered reproductive diapause respectively However when fifth instar nymphs were transferred from 168 h to 1014 h and 1212 h 100 of adult females entered reproductive diapause If the entire life cycle was maintained at 1014 h and 1212 h 667 and 400 of females entered reproductive diapause respectively The critical photoperiod for reproductive diapause was estimated to lie between 1311 h and 135105 h

THE BIOLOGY OF A BIRCH LEAF MINER, MESSA NANA (HYMENOPTERA: TENTHREDINIDAE), NEW TO CANADA

1970 ◽  
Vol 102 (1) ◽  
pp. 108-111 ◽  
Author(s):  
O. H. Lindquist ◽  
M. J. Thomson
Keyword(s):  
United States ◽  
Life Cycle ◽  
Leaf Miner ◽  
Immature Stages ◽  
Northeastern United States

AbstractMessa nana Klug, a European birch leaf miner which was previously reported in northeastern United States, was recently discovered in southeastern Ontario. Its life cycle and some immature stages are described.

scholarly journals Diptera of sanitary importance associated with composting of biosolids in Argentina

2003 ◽  
Vol 37 (6) ◽  
pp. 722-728 ◽  
Author(s):  
Valeria Alejandra Labud ◽  
Liliana Graciela Semenas ◽  
Francisca Laos
Keyword(s):  
Life Cycle ◽  
Sex Ratio ◽  
Musca Domestica ◽  
Calliphora Vicina ◽  
Immature Stages ◽  
Community Characteristics ◽  
Complete Life Cycle ◽  
Phaenicia Sericata ◽  
Composting Facilities

OBJECTIVE: Odorous compounds produced at the biosolids composting plant in Bariloche (NW Patagonia) attract a variety of insects, mainly belonging to the order Diptera. In order to characterize these flies, collected specimens were taxonomically identified, their community characteristics were described and their sanitary and synanthropic importance and autochthonous or introduced character were determined. METHODS: Sampling was performed from October 1999 until March 2000. Adults were collected using an entomological net, and larvae and puparia were obtained from the composting material and incubated to obtain adults. Richness, abundance and sex ratio were calculated. RESULTS: A total of 9 taxa of Diptera were identified: Sarconesia chlorogaster, Phaenicia sericata, Calliphora vicina, Cochliomya macellaria, Ophyra sp, Muscina stabulans, Musca domestica, Sarcophaga sp and Fannia sp. Specimens of Anthomyiidae, Acaliptratae and one larva of Eristalis tenax were also found. Ophyra sp. was the most abundant taxa. All the captured Diptera belonged to introduced taxa. Most of them are considered to be eusynanthropic and/or hemisynanthropic and have sanitary importance as they may cause myiasis and pseudomyiasis. The high number of females registered and the finding of immature stages indicated that flies can develop their complete life cycle on biosolid composting windrows. CONCLUSIONS: The characterization of flies obtained in this study may be useful for defining locations of urban or semi-urban composting facilities. It also highlights the importance of sanitary precautions at such plants.

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