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.

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).

scholarly journals Development and reproduction of Podisus distinctus (Heteroptera: Pentatomidae) fed on larva of Bombyx mori (Lepidoptera: Bombycidae)

2004 ◽  
Vol 64 (2) ◽  
pp. 237-242 ◽  
Author(s):  
M. C. Lacerda ◽  
A. M. R. M. Ferreira ◽  
T. V. Zanuncio ◽  
J. C. Zanuncio ◽  
A. S. Bernardino ◽  
...  
Keyword(s):  
Biological Control ◽  
Life Cycle ◽  
Relative Humidity ◽  
Bombyx Mori ◽  
Insect Pests ◽  
Males And Females ◽  
Heteroptera Pentatomidae ◽  
Bombyx Mori L ◽  
Chemical Products ◽  
Coleoptera Tenebrionidae

Biological control has been reducing the use of chemical products against insect pests, specially predatory Pentatomidae. Species of this group can present high variations in their life cycle as a result of their diet. Thus, the objective of this research was to study nymph development and reproduction of Podisus distinctus (Stäl, 1860) (Heteroptera: Pentatomidae) fed on Bombyx mori L., 1758 (Lepidoptera: Bombycidae) larvae (T1), compared to those fed on Tenebrio molitor L., 1758 (Coleoptera: Tenebrionidae) (T2) and Musca domestica L., 1758 (Diptera: Muscidae) larvae (T3) at a temperature of 25 ± 0.5ºC, relative humidity of 70 ± 2%, and photophase of 12 h. Predators fed on B. mori showed duration of the nymph phase (18.68 ± 1.02) similar to those fed on T. molitor (18.32 ± 1.49). Pre-oviposition and oviposition periods and number of egg masses, besides eggs and nymphs per female, were higher with B. mori (5.83 ± 2.02; 15.00 ± 7.40; 8.42 ± 1.84; 296.69 ± 154.75; and 228.55 ± 141.04, respectively) while longevity of males and females of P. distinctus was 25.76 ± 16.15 and 35.00 ± 16.15 days with T. molitor, and 20.57 ± 13.60 and 23.46 ± 12.35 days with B. mori, respectively.

scholarly journals The density of females of Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae) affects their reproductive performance on pupae of Bombyx mori L. (Lepidoptera: Bombycidae)

2010 ◽  
Vol 82 (2) ◽  
pp. 323-331 ◽  
Author(s):  
Fabricio F. Pereira ◽  
José C. Zanuncio ◽  
José E. Serrão ◽  
Teresinha V. Zanuncio ◽  
Dirceu Pratissoli ◽  
...  
Keyword(s):  
Life Cycle ◽  
Relative Humidity ◽  
Sex Ratio ◽  
Bombyx Mori ◽  
Reproductive Performance ◽  
Climatic Chamber ◽  
Glass Tubes ◽  
Bombyx Mori L

Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae) is a gregarious and polyphagous parasitoid mainly of Lepidoptera pupae. The objective of this paper as to study the developent of parasitoid on Bombyx mori L. (Lepidoptera: Bombycidae) pupae exposed to one, nine, 18, 27, 36, 45 or 54 female P. elaeisis, respectively. The females of the parasitoid remained in contact with pupae for 24 hours in glass tubes (14.0 x 2.2 cm), packed in a climatic chamber regulated at 25 ± 2°C, 70 ± 10% relative humidity and photo phase of 12 hours. With the exception of density 1:1 (72.72%), in other densities parasitism was 100%. Adults of P. elaeisis did not emerge from pupae at densities of 1:1 and 9:1, but 100.0% of parasitoid emergence was observed at the density of 45:1 and 54.54% at 54:1. The duration of the life cycle of this parasitoid ranged from 20 to 28 days. P. elaeisis produced 49 to 589 descendants per pupa of B. mori. The sex ratio of P. elaeisis ranged from 0.93 ± 0.01 to 0.97 ± 0.01 without differences with 18, 27, 36, 45 and 54 females/host. This parasitoid should be reared with the density of 45 females per pupa of B. mori.

Studies on Theocolax formiciformis Westw. (Hym., Pteromalidae), a parasite of Anobium punctatum (Deg.) (Col., Anobiidae)

1964 ◽  
Vol 54 (4) ◽  
pp. 797-803 ◽  
Author(s):  
Jean M. Taylor
Keyword(s):  
Biological Control ◽  
Life Cycle ◽  
Relative Humidity ◽  
Wood Surface ◽  
Biological Control Agent ◽  
Glass Plate ◽  
Control Agent ◽  
Large Numbers ◽  
Cent Relative Humidity ◽  
Anobium Punctatum

A description is given of the life-cycle in Britain of Theocolax formiciformis Westw. (Pteromalidae), a parasite of Anobium punctatum (Deg.) (Anobiidae). Adults emerge from infested wood in large numbers from April to June. Eggs are laid through the wood surface and use was made of this habit as a means of rearing this parasite under observation in the laboratory. Anobium larvae were placed individually in channels gouged in the surface of 3-inch squares of plywood. They were covered with tracing paper and the parasites were caged on this by means of a glass ring covered with a glass plate. Development from egg to adult at 22 and 25°C., and 75 per cent, relative humidity, averaged about five and six weeks, respectively, compared with 12 weeks outdoors in summer. The number of progeny per female was highest (approximately five) at 22°C., at which the ratio of males to females was 1:3. Only about one per cent, of the adults reared were winged. The use of Theocolax as a biological-control agent is not considered practical.

scholarly journals Red flour beetle survival on different food items

2005 ◽  
Vol 2 (1) ◽  
pp. 33-36
Author(s):  
Baghdad Science Journal
Keyword(s):  
Life Cycle ◽  
Relative Humidity ◽  
Durum Wheat ◽  
Constant Temperature ◽  
Red Flour Beetle ◽  
Living Situation ◽  
Flour Beetle ◽  
Food Items

Studied red beetle life on each of the yen and wheat durum wheat, barley, corn, rice, chickpeas, ground peanuts and beans in Living situation constant temperature and relative humidity of 65% for a period of 66 days was the life cycle of the insect different from one substance to another ....

scholarly journals HIGROSCOPICITY OF CHARCOAL PRODUCED IN DIFFERENT TEMPERATURES

CERNE ◽  
2016 ◽  
Vol 22 (4) ◽  
pp. 423-430 ◽  
Author(s):  
Ananias Francisco Dias Júnior ◽  
Lucas Pereira Pirola ◽  
Saly Takeshita ◽  
Artur Queiroz Lana ◽  
José Otávio Brito ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Adsorption Capacity ◽  
Carbonization Temperature ◽  
Salt Solutions ◽  
Final Temperature ◽  
Different Temperatures ◽  
Humidity Environment ◽  
Adsorbed Moisture

ABSTRACT This research aimed to evaluate hygroscopicity of charcoal produced under four different final carbonization temperatures. For evaluation of hygroscopicity charcoal samples were conditioned in environments with controlled temperature and relative humidity, using saturated salt solutions. The final carbonization temperature significantly influenced the products yields and the properties of charcoal. The charcoal produced in the final temperature of 750 °C showed the highest adsorption capacity of water, indicated by the moisture content after conditioning, in the higher relative humidity environment. Correlations were observed between adsorbed moisture and the porosity of charcoal produced.

scholarly journals Amblyomma rotundatum (Koch, 1844) (Acari: Ixodidae) two-host life-cycle on Viperidae snakes

2010 ◽  
Vol 19 (3) ◽  
pp. 174-178 ◽  
Author(s):  
Daniel Sobreira Rodrigues ◽  
Ricardo Maciel ◽  
Lucas Maciel Cunha ◽  
Romário Cerqueira Leite ◽  
Paulo Roberto de Oliveira
Keyword(s):  
Life Cycle ◽  
North America ◽  
Relative Humidity ◽  
Total Duration ◽  
Ixodid Tick ◽  
Natural Conditions ◽  
South Central ◽  
Controlled Conditions ◽  
In Captivity ◽  
Host Life

Amblyomma rotundatum is an ixodid tick that infests ectothermic animals and reproduces exclusively by parthenogenesis. This tick has been frequently reported to infest reptiles and amphibians, under natural conditions and sometimes in captivity. It was described in Brazil and several other countries of South, Central and North America. Although many studies have reported aspects of its biology, none of them has used regularly either ophidian as hosts, or controlled temperature, humidity and luminosity for parasitic stages. The objective of this experiment was to study the life cycle of A. rotundatum feeding on Viperidae snakes under room controlled conditions at 27 ± 1 ºC temperature, 85 ± 10% relative humidity and 12:12 hours photoperiod for parasitic stages, and under B.O.D incubator conditions at 27 ± 1 ºC temperature, 85 ± 10% relative humidity and scotophase for non-parasitic stages. The total duration of the life cycle ranged from 56 to 163 days (mean of 105 days). Two-host life cycle was observed for most of the ixodid population studied.

scholarly journals Amblyomma nodosum (Neumann, 1899): observations on life cycle under laboratory conditions

2015 ◽  
Vol 24 (3) ◽  
pp. 357-360 ◽  
Author(s):  
Michele da Costa Pinheiro ◽  
Elizabete Captivo Lourenço ◽  
Iwine Joyce Barbosa de Sá-Hungaro ◽  
Kátia Maria Famadas
Keyword(s):  
Life Cycle ◽  
Relative Humidity ◽  
Environmental Conditions ◽  
Oryctolagus Cuniculus ◽  
Adult Stage ◽  
Immature Stages ◽  
Experimental Conditions ◽  
Laboratory Conditions ◽  
Natural Hosts

The natural hosts of Amblyomma nodosum in the immature stages are a variety of birds and the anteater in the adult stage. However, so far no data have been published about this tick’s life cycle. To fill this gap, a record was made of its development under laboratory conditions. All the procedures were controlled in a BOD chamber set at 27±1 °C and 80±10% relative humidity and scotophase. The parasitic stages were raised on rabbits (Oryctolagus cuniculus Linnaeus, 1758), from which more than 50% of larvae and nymphs were recovered, although only a small portion performed ecdysis. The adults did not fixed on the rabbits, which suggests that the experimental conditions were unsuitable for the requirements of this species. The data obtained here indicate that A. nodosum is highly dependent on its host and environment whereas under laboratory conditions and host chosen for the study was not obtained satisfactory results and new studies with different hosts and new environmental conditions should be elaborated.

scholarly journals Experimental model of ammonia elimination by ozone in the air

2013 ◽  
Vol 59 (No. 2) ◽  
pp. 39-45
Author(s):  
P. Hutla ◽  
B. Petráčková ◽  
J. Kára
Keyword(s):  
Weight Loss ◽  
Relative Humidity ◽  
Experimental Model ◽  
Ammonia Concentration ◽  
Experimental Device ◽  
Air Purification ◽  
Air Humidity ◽  
Glass Vessel ◽  
Air Volume ◽  
Different Temperatures

Experimental device was created to model stable atmosphere. The device consists of the glass vessel filled with air. Volume of the vessel is 30 litres. The ammonia concentration is similar to stable air. Amount of ozone in 2.4 mg was added and subsequently weight loss of ammonia was measured. Measurements were performed at different temperatures (20°C, 45°C) and different air humidity. The observed ratio of reacting ozone and ammonia is 5.2:1. It was also found, that this ratio is practically independent of temperature and relative humidity that occur in a stable environment. The results are the basis for the design of ozone air purification technology.  

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