scholarly journals Temperature-dependent development and survival of immature stages of the alfalfa leafcutter bee, Megachile rotundata (Hymenoptera: Megachilidae)

Apidologie ◽  
1992 ◽  
Vol 23 (1) ◽  
pp. 11-23 ◽  
Author(s):  
G. H. Whitfield ◽  
K. W. Richards
Keyword(s):  
Immature Stages ◽  
Megachile Rotundata ◽  
Temperature Dependent ◽  
Dependent Development ◽  
Leafcutter Bee

INFLUENCE OF TEMPERATURE ON SURVIVAL AND RATE OF DEVELOPMENT OF PTEROMALUS VENUSTUS (HYMENOPTERA: PTEROMALIDAE), A PARASITE OF THE ALFALFA LEAFCUTTER BEE (HYMENOPTERA: MEGACHILIDAE)

1985 ◽  
Vol 117 (7) ◽  
pp. 811-818 ◽  
Author(s):  
G.H. Whitfield ◽  
K.W. Richards
Keyword(s):  
Western Canada ◽  
Base Temperature ◽  
Degree Days ◽  
Temperature Dependent ◽  
Dependent Development ◽  
Rate Versus ◽  
Development Data ◽  
Influence Of Temperature On ◽  
Leafcutter Bee ◽  
Incubation Temperatures

AbstractIncidence of parasitism by Pteromalus venustus Walker in populations of the alfalfa leafcutter bee, Megachile rotundata (F.), in western Canada from 1976 to 1983 was found to average ca. 1%. An average of 17.4 parasite adults emerged from each host cocoon and the ratio of males to females was 1:1. Temperature-dependent development and survival at 8 constant temperatures are described. The range of temperatures for greatest survival of the parasite (30–32 °C) coincided with the recommended incubation temperatures for cocoons of the leafcutter bee. Development data fitted a 4-parameter development model. Linear regression of development rate versus temperature provided estimates of base temperature and development time in degree-days for the egg, larval, pupal, and combined stages.

A COMPARISON OF TWO TEMPERATURE-DEPENDENT DEVELOPMENT MODELS FOR IMMATURE STAGES OF THE NANTUCKET PINE TIP MOTH (LEPIDOPTERA: TORTRICIDAE)

1989 ◽  
Vol 24 (1) ◽  
pp. 117-123 ◽  
Author(s):  
James A. Richmond ◽  
Jeanne E. Bacheler
Keyword(s):  
Regression Analysis ◽  
Immature Stages ◽  
Temperature Dependent ◽  
Pupal Development ◽  
Dependent Development ◽  
Development Models ◽  
Threshold Temperatures ◽  
Nantucket Pine Tip Moth ◽  
Rhyacionia Frustrana ◽  
Two Temperature

Parameters for a degree-day model (DD) and the Sharpe-DeMichele poikilothermic model (POIK) were estimated for the development of Rhyacionia frustrana (Comstock) immature stages. A comparison of the accuracy between the two models was made for eggs, larvae, and pupae. The DD and POIK model were equally effective for predicting development of eggs, but the POIK model was superior for predicting larval and pupal development. Regression analysis of predicted vs. observed development days show a good fit (R2 > 0.99) for eggs using both models, a relative good fit (R2 > 0.90) for larvae and a poor fit (R2 < 0.85) for pupae. Threshold temperatures were at 10.0°C for eggs, 7.0°C for larvae, and 9.8°C for pupae. Optimum hatch was 100% for eggs at 24°C and required 81 DD; optimum survival was 77% for larvae at 21°C and required 704 DD; and optimum eclosion from pupae was 55% at 26°C and required 227 DD.

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.

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.

TOXICITY OF INSECTICIDES TO THE ALFALFA LEAFCUTTER BEE, MEGACHILE ROTUNDATA F. (HYMENOPTERA: MEGACHILIDAE), ESTABLISHED BY THREE EVALUATION METHODS

1988 ◽  
Vol 120 (4) ◽  
pp. 297-305 ◽  
Author(s):  
W. A. Charnetski
Keyword(s):  
Petri Dish ◽  
Evaluation Methods ◽  
Laboratory Evaluation ◽  
Evaluation Procedure ◽  
Megachile Rotundata ◽  
Field Cage ◽  
Male And Female ◽  
Significant Difference ◽  
Leafcutter Bee ◽  
Significant Mortality

AbstractThree methods—tube chambers (ventilated and unventilated), petri dish chambers, and field cages—were used to evaluate the toxicity of deltamethrin, trichlorfon, and methoxychlor deposits on alfalfa, Medicago sativa L., to 1- to 7-day-old alfalfa leafcutter bees, Megachile rotundata (F.), 24 and 48 h after exposure. In unventilated tube chambers, all three insecticides were significantly toxic to male bees after 24 and 48 h, but only deltamethrin and trichlorfon were significantly toxic to female bees after 24 h. In ventilated tube chambers, only deltamethrin was significantly toxic by contact and then only to male bees at 24 h. Significant vapor action was observed only for trichlorfon and only in unventilated tube chambers. By the petri dish method, only deltamethrin caused significant mortality to male and female bees. However, bee mortality increased significantly between 24 and 48 h. By the field cage method, there was no significant difference in mortality among treatments and controls within the 24- and 48-h evaluations. Bee mortality in the controls was much higher in the petri dish and field cage methods than in either of the two variations of the tube chamber method. The three evaluation methods are compared and the need for a standardized laboratory evaluation procedure is discussed.

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