scholarly journals Temperature-dependent development and survivorship of Idaea inquinata (Scopoli) (Lepidoptera Geometridae) eggs at two humidity levels

2010 ◽  
Vol 42 (3) ◽  
pp. 153 ◽  
Author(s):  
Lidia Limonta ◽  
Juljus Sulo ◽  
Daria Patrizia Locatelli
Keyword(s):  
Relative Humidity ◽  
Linear Function ◽  
Temperature Dependent ◽  
Egg Hatching ◽  
Cereal Products ◽  
Influence Of Temperature ◽  
Dependent Development ◽  
Non Linear ◽  
Developmental Rates ◽  
Potential Pest

<em>Idaea inquinata</em> (Scopoli) mainly feeds on dried plants, nevertheless, it is also a potential pest of stored product as it is able to develop on cereal products. The few references on the biology of this species do not deal with the influence of temperature and relative humidity on egg hatching. To fi ll this gap, groups of 100 eggs, 24-48 hours old, were exposed to constant temperatures (13, 15, 36, and 38&plusmn;1 &deg;C), two relative humidities (35, 70&plusmn;5%) and a photoperiod of 0:24 (Light:Dark); eight tests were carried out. E ach test was replicated four times. The lowest proportion of hatched eggs was observed at 15 &deg;C (9.5) and 36 &deg;C (8.7) with 35&plusmn;5% R .H. while at 13 and 38 &deg;C eggs did not hatch. A non-linear function is used to represent the developmental rates and survivorship of eggs at 35 and 70% R .H. between lower and upper thresholds temperature.

Selection of models to describe the temperature-dependent development of Neoleucinodes elegantalis (Lepidoptera: Crambidae) and its application to predict the species voltinism under future climate conditions

2021 ◽  
pp. 1-9
Author(s):  
Hevellyn Talissa dos Santos ◽  
Cesar Augusto Marchioro
Keyword(s):  
Climate Change ◽  
Linear Model ◽  
Future Climate ◽  
Future Climate Change ◽  
Climate Change Scenarios ◽  
Temperature Dependent ◽  
Dependent Development ◽  
Degree Day ◽  
Non Linear ◽  
The Impact

Abstract The small tomato borer, Neoleucinodes elegantalis (Guenée, 1854) is a multivoltine pest of tomato and other cultivated solanaceous plants. The knowledge on how N. elegantalis respond to temperature may help in the development of pest management strategies, and in the understanding of the effects of climate change on its voltinism. In this context, this study aimed to select models to describe the temperature-dependent development rate of N. elegantalis and apply the best models to evaluate the impacts of climate change on pest voltinism. Voltinism was estimated with the best fit non-linear model and the degree-day approach using future climate change scenarios representing intermediary and high greenhouse gas emission rates. Two out of the six models assessed showed a good fit to the observed data and accurately estimated the thermal thresholds of N. elegantalis. The degree-day and the non-linear model estimated more generations in the warmer regions and fewer generations in the colder areas, but differences of up to 41% between models were recorded mainly in the warmer regions. In general, both models predicted an increase in the voltinism of N. elegantalis in most of the study area, and this increase was more pronounced in the scenarios with high emission of greenhouse gases. The mathematical model (74.8%) and the location (9.8%) were the factors that mostly contributed to the observed variation in pest voltinism. Our findings highlight the impact of climate change on the voltinism of N. elegantalis and indicate that an increase in its population growth is expected in most regions of the study area.

Influence of Temperature and Relative Humidity on the Life-span of Adults of the Swaine Jack-pine Sawfly, Neodiprion swainei Middleton (Hymenoptera: Diprionidae)

1966 ◽  
Vol 98 (8) ◽  
pp. 789-794 ◽  
Author(s):  
J. G. Pilon
Keyword(s):  
Relative Humidity ◽  
Linear Regression ◽  
Life Span ◽  
Linear Equation ◽  
Jack Pine ◽  
Influence Of Temperature ◽  
Pine Sawfly ◽  
Non Linear Equation ◽  
Non Linear

AbstractThe life -span of Swaine jack-pine sawfly adults was studied under various constant and alternating temperatures and at four different values of relative humidity. Temperature significantly influenced the life-span of both sexes according to a non-linear equation, and relative humidity according to a linear regression. The influence of temperature varied with relative humidity in the case of males but not in the case of females. The life-span of both sexes was shorter at alternating temperatures than at constant temperatures.

TEMPERATURE-DEPENDENT DEVELOPMENT OF THE SPECKLED GREEN FRUITWORM, ORTHOSIA HIBISCI GUENÉE (LEPIDOPTERA: NOCTUIDAE)

1994 ◽  
Vol 126 (5) ◽  
pp. 1263-1275 ◽  
Author(s):  
Gary J.R. Judd ◽  
Joan E. Cossentine ◽  
Mark G.T. Gardiner ◽  
Donald R. Thomson
Keyword(s):  
High Temperature ◽  
Regression Equations ◽  
Life Stages ◽  
Temperature Dependent ◽  
Larval Instars ◽  
Dependent Development ◽  
Management Actions ◽  
Development Times ◽  
Developmental Rates ◽  
Phenology Model

AbstractTemperature-dependent development of eggs, larvae, and pupae of the speckled green fruitworm, Orthosia hibisci Guenée, at constant temperatures of 5–30.0 °C, 7.5–27.5 °C, and 0.8–20.8 °C, respectively, was described. Development times decreased with increasing temperatures and minimum developmental times in eggs, larvae, and pupae occurred at ca. 27.5, 25, and 20.8 °C, respectively. Variation in development times of all life stages was modelled accurately (R2 values 0.98–0.99) with a Weibull distribution. Relationships between temperature and developmental rates of all life stages were described by linear degree-day (DD) and nonlinear poikilotherm models. There were significant differences (ANOVA, P < 0.05) among the slopes of regression equations describing developmental rates of different life stages and larval instars. Minimum developmental temperatures for eggs (3.4 °C), first- through fifth-instar larvae (4.7, 2.9, 3.6, 3.5, and 3.7 °C), and pupae (2.8 °C) were determined by extrapolation of linear regression equations to the x-intercept. Median development time of eggs, first- through fifth-instar larvae, and pupae required 99.0, 44.2, 51.5, 52.4, 57.1, 69.9, and 61.3 DD above the minimum developmental temperatures, respectively. Developmental rates of eggs and all larval instars averaged were described by six-parameter models exhibiting low- and high-temperature inhibition. Development of pupae was best described by a four-parameter model exhibiting low- but no high-temperature inhibition. This information should be useful for developing a phenology model to improve management actions against O. hibisci.

CLASS OF BOOLEAN FUNCTIONS CONSTRUCTED USING SIGNIFICANT BITS OF LINEAR RECURRENCES OVER THE RING ℤ2n

2019 ◽  
Vol 6 (2) ◽  
pp. 90-94
Author(s):  
Hernandez Piloto Daniel Humberto
Keyword(s):  
Linear Function ◽  
Boolean Functions ◽  
Hamming Distance ◽  
Linear Recurrences ◽  
Maximum Period ◽  
Non Linear ◽  
The Given ◽  
Class Of Functions

In this work a class of functions is studied, which are built with the help of significant bits sequences on the ring ℤ2n. This class is built with use of a function ψ: ℤ2n → ℤ2. In public literature there are works in which ψ is a linear function. Here we will use a non-linear ψ function for this set. It is known that the period of a polynomial F in the ring ℤ2n is equal to T(mod 2)2α, where α∈ , n01- . The polynomials for which it is true that T(F) = T(F mod 2), in other words α = 0, are called marked polynomials. For our class we are going to use a polynomial with a maximum period as the characteristic polyomial. In the present work we show the bounds of the given class: non-linearity, the weight of the functions, the Hamming distance between functions. The Hamming distance between these functions and functions of other known classes is also given.

scholarly journals Forensic Entomology in China and Its Challenges

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 230
Author(s):  
Yu Wang ◽  
Yinghui Wang ◽  
Man Wang ◽  
Wang Xu ◽  
Yanan Zhang ◽  
...  
Keyword(s):  
Species Identification ◽  
Forensic Entomology ◽  
Research Progress ◽  
Temperature Dependent ◽  
Related Research ◽  
Dependent Development ◽  
Faunal Succession ◽  
Recent Research Progress

While the earliest record of forensic entomology originated in China, related research did not start in China until the 1990s. In this paper, we review the recent research progress on the species identification, temperature-dependent development, faunal succession, and entomological toxicology of sarcosaprophagous insects as well as common applications of forensic entomology in China. Furthermore, the difficulties and challenges forensic entomologists face in China are analyzed and possible countermeasures are presented.

scholarly journals Temperature Dependent Friction Modelling: The Influence of Temperature on Product Quality

2020 ◽  
Vol 47 ◽  
pp. 535-540 ◽  
Author(s):  
Daan Waanders ◽  
Javad Hazrati Marangalou ◽  
Matthäus Kott ◽  
Sabrina Gastebois ◽  
Johan Hol
Keyword(s):  
Product Quality ◽  
Temperature Dependent ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Friction Modelling
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