scholarly journals Effect of Temperature on Life History of Bemisia Tabaci (Gennadius) (Homoptera: Aleyrodidae) on Cassava Manihot Esculenta Crantz

2021 ◽  
Vol 4 (1) ◽  
pp. 912-920
Author(s):  
Nguyen Duc Khanh ◽  
Le Ngoc Anh ◽  
Ho Thi Thu Giang
Keyword(s):  
Life History ◽  
Bemisia Tabaci ◽  
Effect Of Temperature ◽  
Degree Days ◽  
Manihot Esculenta Crantz ◽  
Developmental Threshold ◽  
Wide Range ◽  
Important Pest ◽  
Different Temperatures ◽  
Influence Of Temperature On

The aim of the present study was to evaluate the relationships between environmental temperatures and life-history traits of whitefly Bemisia tabaci on cassava in the Northern part of Vietnam. The influence of temperature on the biological characteristics of whitefly B. tabaci fed on cassava was evaluated at 20ºC, 25ºC, 27.5ºC, and 30ºC using individual insect rearing methodology. Results of the study showed that the development time from egg to adult of B. tabaci was influenced by temperatures. The data indicated that under different temperatures (20ºC, 25ºC, 27.5ºC, and 30ºC), the life cycle of B. tabaci were 41.46, 28.64, 24.29, and 20.25 days, respectively. The determination of lower developmental threshold and degree days for whitefly development were 11.2ºC and 344.8 degree-days. There were 14.31 whitefly generations within 1 year on cassava suggesting this plant is a suitable host plant for the development and reproduction of B. tabaci. Female longevity ranged from 4.92 to 10.23 days. The fecundity ranged from 49.3 to 74.0 eggs/female. The mortality rate reached its highest rate of 36.27% at 30ºC. Our results suggested that B. tabaci had high reproduction rates and demonstrated their positive fitness traits on cassava in a wide range of temperatures, being a potential important pest of cassava cultivars.

Effect of Temperature on the Predator, (Reuter) (Hemiptera: Anthocordiae) Feeding on Cryptolestes pusillus (Schon.) (Coleoptera: Cucujidae)

1970 ◽  
Vol 15 ◽  
pp. 41-46 ◽  
Author(s):  
MM Rahman ◽  
W Islam ◽  
KN Ahmed
Keyword(s):  
Life History ◽  
Insect Pest ◽  
Developmental Time ◽  
Effect Of Temperature ◽  
Hatching Rate ◽  
Immature Stages ◽  
Egg Hatching ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Cryptolestes Pusillus

Xylocoris flavipes (Reuter) is one of the dominant predators of many stored product insect pest including Cryptolestes pusillus. The influence of temperature on predator development, survival and some selected life history parameters was determined. Eggs laid/female (27.27±2.52) and egg hatching rate (%) (88.25±2.19) were highest at 30°C and lowest at 20°C (5.43±1.19 and 30.79±4.63%) respectively but no eggs laid at 15°C. Mortality among immature stages (%) was highest (51.71±1.48) at 35°C and lowest (24.25c±1.14) at 25°C. Developmental times decreasing with the increasing of temperature. Maximum numbers of progeny/female/day (3.55±0.76) were produced at 25°C and minimum (0.83±0.04) were at 20°C.The sex ratios (% female) of X. flavipes were 47.04, 56.68, 51.66 and 50.07 for 20, 25, 30 and 35°C respectively. Survivorship of ovipositing females was highest at 25°C but lowest at 35°C respectively. Key words: Xylocoris flavipes, Cryptolestes pusillus, life history, temperature, developmental time   doi: 10.3329/jbs.v15i0.2201 J. bio-sci. 15: 41-46, 2007

The Influence of Temperature on the Galvanic Corrosion in Multi-Material System in Seawater

2015 ◽  
Vol 1101 ◽  
pp. 225-228
Author(s):  
Chun Li Wang ◽  
Jian Hua Wu
Keyword(s):  
Corrosion Behavior ◽  
Galvanic Corrosion ◽  
Effect Of Temperature ◽  
Material System ◽  
Ni Alloy ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Zero Resistance ◽  
Increasing Temperature ◽  
Surface Morphologies

The galvanic corrosion behavior of titanium (TA2)/Cu-Ni alloy (B10)/low alloy steel (921A) multi-material system has been studied using a zero-resistance ammeter (ZRA) in seawater at different temperatures. After the tests, the surface morphologies of the samples were detected by SEM. Results showed galvanic corrosion behavior of TA2/B10/921A fulfill the mixed potential theory, 921A acts as the anode and both TA2 and B10 act as the cathodes. The effect of temperature on the galvanic corrosion is important, the corrosion rate increases with increasing temperature.

Effect of temperature on the life history of Eretmocerus sp. nr. furuhashii, a parasitoid of Bemisia tabaci

BioControl ◽  
2006 ◽  
Vol 52 (6) ◽  
pp. 733-746 ◽  
Author(s):  
Bao-Li Qiu ◽  
Paul J. De Barro ◽  
Shun-Xiang Ren ◽  
Cai-Xia Xu
Keyword(s):  
Life History ◽  
Bemisia Tabaci ◽  
Effect Of Temperature ◽  
History Of

scholarly journals Effect of temperature on capping efficiency of zeolite and activated carbon under fabric mats for interrupting nutrient release from sediments

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Seung-Hee Hong ◽  
Jae-In Lee ◽  
Chang-Gu Lee ◽  
Seong-Jik Park
Keyword(s):  
Activated Carbon ◽  
Nutrient Release ◽  
Nonwoven Fabric ◽  
Effect Of Temperature ◽  
Overlying Water ◽  
P Release ◽  
Incubation Experiments ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Do Concentration

Abstract We investigated the influence of temperature on the capping efficiency to interrupt the release of nutrients from lake sediments. A 3-cm layer of Zeolite (ZL) or activated carbon (AC) was placed on the contaminated sediments, and nonwoven fabric mats (NWFM) were placed on top of these capping materials. Laboratory incubation experiments were performed under three different temperatures, namely 4, 15, and 30 °C. Under the uncapped condition at 30 °C, dissolved oxygen (DO) was depleted after 30 days, while at 4 °C and 15 °C, DO was present until the end of this experiment. DO concentration in overlying water was more dependent on the temperature than capping condition. ZL/NWFM effectively blocked the release of N from the sediments, and the capping efficiencies of ZL/NWFM for NH4-N at 4, 15, and 30 °C were 98%, 96%, and 94%, respectively. For the interruption of P release, both ZL/NWFM and AC/NWFM were not effective at 4 and 15 °C. At 30 °C, however, AC/NWFM was effective, and its capping efficiencies at 30 °C for PO4-P and T-P were 74.0% and 79.9%, respectively. In summary, nutrient release from sediments was accelerated at higher temperatures, and the effect of capping was significant at high temperature.

Phenotypic plasticity of pigmentation and morphometric traits inPnigalio soemius(Hymenoptera: Eulophidae)

2007 ◽  
Vol 97 (1) ◽  
pp. 101-109 ◽  
Author(s):  
U. Bernardo ◽  
P.A. Pedata ◽  
G. Viggiani
Keyword(s):  
Morphological Traits ◽  
Phenotypic Variability ◽  
Economic Importance ◽  
Effect Of Temperature ◽  
Morphometric Traits ◽  
Influence Of Temperature ◽  
Natural Hosts ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Range Of Variation

AbstractSpecies of the genusPnigalioSchrank are ectoparasitoids on several pest insects. Most species are polyphagous parasitoids of lepidopteran and dipteran leafminers. Despite their potential economic importance, information on intraspecific phenotypic variability is insufficient.Pnigalio soemius(Walker) was reared at five different temperatures (10, 15, 20, 25, 30°C) on mature larvae of one of its natural hosts,Cosmopterix pulchrimellaChambers (Lepidoptera: Cosmopterigidae), to investigate the influence of temperature on size, colour and other morphological traits, and to measure the range of variation of several characters. Thermal developmental reaction norms, which represent the effect of temperature during growth and development on the value of some adult traits, were produced. The results confirmed the influence of temperature on numerous characters and that these characters had a larger range of variation than realized previously in the construction of taxonomic keys to species. In particular, the number and position of the costulae on the propodeum and colour of the gaster were affected by rearing temperature.

The Effect of Temperature on Lithium-Ion Battery Energy Efficiency With Graphite/LiFePO4 Electrodes at Different Nominal Capacities

2018 ◽  
Author(s):  
Ashkan Nazari ◽  
Roja Esmaeeli ◽  
Seyed Reza Hashemi ◽  
Haniph Aliniagerdroudbari ◽  
Siamak Farhad
Keyword(s):  
Energy Efficiency ◽  
Heat Generation ◽  
Lithium Ion ◽  
Effect Of Temperature ◽  
Discharge Rates ◽  
Wide Range ◽  
Different Temperatures ◽  
Lifepo4 Cathode ◽  
Battery Energy ◽  
Charge Discharge

In this work, the energy efficiency of the lithium-ion batteries (LIB) with graphite anode and LiFePO4 cathode (G/LFP) at different nominal capacities and charge/discharge rates is studied through multiphysics modeling and computer simulation. After characterizing all the heat generation sources in the cell, the total heat generation in LIBs is calculated and the charge/discharge efficiency plots at different temperatures are obtained. Since G/LFP LIBs have a wide range of applications in passenger and commercial electric vehicles (EVs), the result of this study assist engineer toward more efficient battery pack design.

scholarly journals The effect of temperature on pollen germination and pollen tube growth of sour cherry cultivars

2014 ◽  
Vol 59 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Dragan Milatovic ◽  
Dragan Nikolic
Keyword(s):  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Pollen Germination ◽  
Pollen Grains ◽  
Sour Cherry ◽  
Tube Growth ◽  
Effect Of Temperature ◽  
Different Temperatures ◽  
Influence Of Temperature On

The study was carried out to determine the effect of three different temperatures (5, 15 and 25?C) on in vitro pollen germination and pollen tube growth of five sour cherry cultivars: ?Heimanns Konservenweichsel?, ?Kelleriis 14?, ?Oblacinska?, ?Rexelle? and ?Sumadinka?. Pollen germination a % agar % Temperature significantly affected pollen germination. High germination rates (50-70%) were obtained at both 15?C and 25?C. Satisfactory germination rates (42-51%) were also obtained at 5?C in some cultivars (?Rexelle?, ?Sumadinka? and ?Heimanns Konservenweichsel?). The influence of temperature on the pollen tube growth was more prominent. The length of pollen tubes was three to six times higher at 15?C and 25?C in comparison with 5?C. This has led to the conclusion that the temperature of 5?C, although it could be adequate for pollen germination, is not high enough for optimal pollen tube growth. was determined by germinating pollen grains in culture medium containing 0.7agar-and 15sucrose.

Influence of temperature on microbial colonisation of clayey schist as a support media of a submerged filter for groundwater denitrification

2007 ◽  
Vol 55 (8-9) ◽  
pp. 165-172 ◽  
Author(s):  
A. De la Rúa ◽  
B. Rodelas ◽  
J. González-López ◽  
M.A. Gómez
Keyword(s):  
Biofilm Formation ◽  
Effect Of Temperature ◽  
Cold Environments ◽  
Pseudomonas Mandelii ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Denitrification Activity ◽  
Natural Microbiota ◽  
Denitrification Process ◽  
Made In

The effect of temperature on biofilm formation and denitrification activity was evaluated. Assays were made in a lab-scale submerged filter for the denitrification of polluted groundwater, with and without a previous inoculation. The inoculation was carried out with a selected strain of Pseudomonas mandelii. Different temperatures were tested: 5, 10, 20 and 30 °C. Biofilm observations were made, and monitoring of the denitrification capacity of the system was maintained during the experiment. Our results showed that both colonisation of the support material of the filter and biofilm maturity have a dependency with temperature, with an optimum temperature of 20 °C if the system was previously inoculated with the Pseudomonas mandelii strain. For a correct achievement of the denitrification process, a previous inoculation of the system is essential. Although the development of a biofilm from the natural microbiota present in the groundwater is possible, it is not capable to adequately denitrify polluted groundwater. In terms of the correct achievement of the denitrification process, temperature affects the operation of the system at cold environments, although the use of Pseudomonas mandelii strain A103 allows denitrification at 10–30 °C with very good results (above 90% removal), affecting only to the time needed for the stabilisation of the system.

Study on the Influence of Temperature on the Mortality of Tribolium confusum J. du Val. Exposed to Carbon Dioxide or Nitrogen

1993 ◽  
Vol 48 (7-8) ◽  
pp. 590-594 ◽  
Author(s):  
Louis A. Buscarlet
Keyword(s):  
Food Product ◽  
Adult Mortality ◽  
Tribolium Confusum ◽  
Stored Grain ◽  
Pure Nitrogen ◽  
Time Saving ◽  
Important Pest ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Atmosphere Temperature

In the pest control of stored products like grain and flour, treatment with gases like CO2 or nitrogen plays an increasing role, as this type of treatment leaves no residues in the food product and is less questionable than treatment with ionizing radiation. An important pest of stored grain is the beetle Tribolium confusum. T. confusum pupae, youn g and aged adults were exposed to pure nitrogen, CO2 or air at different temperatures between 38 and 46 °C. In nitrogen as well as in CO2 pupae were the most resistant. Nitrogen efficacy on adult mortality was much higher than CO2 which was higher than air. For pupae CO2 was more efficient than nitrogen or air in the range 38 - 45 °C. The temperature dependence of the sensitivity to both gases was noticeable in every stage, particularly below a given specific temperature. It was concluded that the combination controlled-atmosphere-temperature could be a valuable time saving and non aggressive technique for the stored-foods insects control.

scholarly journals Influence of temperature on tungsten carbide formation in a beam plasma discharge

2021 ◽  
Vol 2064 (1) ◽  
pp. 012055
Author(s):  
G K Zhanbolatova ◽  
V V Baklanov ◽  
M K Skakov ◽  
I A Sokolov ◽  
O S Bukina ◽  
...  
Keyword(s):  
Carbon Film ◽  
Sample Surface ◽  
Irradiation Temperature ◽  
Effect Of Temperature ◽  
Carbide Formation ◽  
Tungsten Carbides ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Tungsten Surface ◽  
Tungsten Monocarbide

Abstract This paper presents a method of tungsten surface carbidization using a plasma-beam setup to assess the effect of temperature on the formation of tungsten carbides. Methane was used as a plasma-forming gas. The working gas pressure in the chamber was (1.3–1.4)10−1 Pa. Experiments on the formation of carbides were carried out at different temperatures (700-1000°C). It was recorded that at a temperature of 700°C, crystallization centers of a carbon film appear on the sample surface. With an increase in the irradiation temperature to 800°C and 900°C, the surface of the samples is covered with a continuous carbon film. As a result of the experimental work carried out, it was found that the formation of tungsten semicarbide occurs at 900°C. A further increase in temperature leads to the formation of tungsten monocarbide.

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