Lethal and sublethal effects of cantharidin on the life history traits and population parameters ofHelicoverpa armigera(Hübner) (Lepidoptera: Noctuidae)

2013 ◽  
Vol 70 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Rashid A Khan ◽  
Maryam Rashid ◽  
Dun Wang ◽  
Ya-Lin Zhang
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Sublethal Effects ◽  
Population Parameters ◽  
Lepidoptera Noctuidae

Life history traits of Praina temperata (Lepidoptera, Noctuidae): a widely distributed and neglected cutworm of the Neotropics

2021 ◽  
pp. 1-17
Author(s):  
Alexandre Specht ◽  
Eduardo Carneiro ◽  
Vânia F. Roque-Specht ◽  
Mirna M. Casagrande ◽  
Lidia Venâncio ◽  
...  
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Lepidoptera Noctuidae

scholarly journals Sublethal effects of bifenazate on life history and population parameters of Tetranychus urticae (Acari: Tetranychidae)

2017 ◽  
Vol 22 (1) ◽  
pp. 148 ◽  
Author(s):  
Ya Ying Li ◽  
Xiao Fan ◽  
Guo Hao Zhang ◽  
YI QING LIU ◽  
HAN QIU CHEN ◽  
...  
Keyword(s):  
Life History ◽  
Tetranychus Urticae ◽  
Sublethal Effects ◽  
Sublethal Effect ◽  
Intrinsic Rate ◽  
Lethal Effect ◽  
Intrinsic Rate Of Increase ◽  
Population Parameters ◽  
Rate Of Increase ◽  
Two Spotted Spider Mite

Traditional estimating only by measuring the lethal effect of acaricides may underestimate the total effects of acaricides on the pest mites. In order to investigate the sublethal effect of bifenazate on life history and population parameters of the two-spotted spider mite, Tetranychus urticae Koch, the newly emerged females were treated with two lethal concentrations of bifenazate: LC10 (4.92 μg/mL) and LC20 (8.77 μg/mL). Subsequently, the development and fecundity of the progeny generations were observed. Compared to the control, exposure to the 10% lethal concentrations (LC10) and LC20 of bifenazate severely affected the parental generation of T. urticae, including survival rate (reduced 9% and 13%), oviposition period (reduced 77.6% and 83.1%), fecundity per female (decreased 89.2% and 76.9%) and longevity (decreased 79.2% and 83.1%). Besides, the population parameters of the progeny generation from the treated females were also investigated. The results showed that the progeny generation had lower intrinsic rate of increase (rm) and finite rate of increase (λ), longer mean generation time (Tc) compared to the control. The results suggested that the sublethal effects of bifenazate on population growth of T. urticae were significant, and the results of this study could be used as a guide for the rational use of bifenazate in the field for better managing pest mites.

The effects of Spiromesifen on life history traits and demographic parameters of predatory mite Neoseiulus californicus (Acari: Phytoseiidae) and its prey Tetranychus urticae Koch (Acari: Tetranychidae)

2019 ◽  
Vol 24 (8) ◽  
pp. 1512-1525
Author(s):  
Niloufar Sangak Sani Bozhgani1 ◽  
Katayoon Kheradmand ◽  
Aliasghar Talebi
Keyword(s):  
Life History ◽  
Tetranychus Urticae ◽  
Life History Traits ◽  
Sublethal Effects ◽  
Predatory Mite ◽  
Neoseiulus Californicus ◽  
Intrinsic Rate Of Increase ◽  
Adult Longevity ◽  
Demographic Parameters ◽  
Rate Of Increase

Estimating sublethal effects of acaricides on phytoseiid mites and their prey as a reliable approach in predicting the acaricides impacts is mandatory for IPM programs. The aim of this study was to evaluate the effects of spiromesifen on life history traits and demographic parameters of the offspring of Neoseiulus californicus and Tetranychus urticae under laboratory conditions [25 ± 2ºC, 70 ± 5% RH and 16:8 (L:D) h]. The experiments were conducted based on the leaf-dip technique. The crude data were analysed based on age-stage, two-sex life table analysis. The pre-adult and adult longevity of both sexes significantly reduced for N. califonicus and T. urticae with the concentration enhancing from LC20 to LC35. In addition, the oviposition period for both species significantly decreased as a consequence of treatment with LC25 and LC35 of spiromesifen. The minimal values of the total fecundity for N. califonicus and T. urticae were 16.58 and 19.35 (offspring/individual), respectively, which was related to LC35 concentration. Further, the lowest values of R0 and GRR of N. califonicus and its prey were 48.88 and 31.14 (offspring/individual) in LC35, respectively. However, the intrinsic rate of increase (r) and finite rate of increase (λ) were not significantly influenced by sublethal concentration in N. californicus while the r and λ were significantly reduced in T. urticae treated by LC20, LC25 and LC35. Therefore, spiromesifen could profoundly decrease the population growth rate of T. urticae but can not be considered as a compatible acaricide with N. califonicus because of its negative effect on the longevity, total lifespan, and reproductive periods and should not be used with this predatory mite in integrated pest management programs.

scholarly journals Louse (Insecta: Phthiraptera) infestations of the Amur Falcon (Falco amurensis) and the Red-footed Falcon

2015 ◽  
Vol 23 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Imre Sándor Piross ◽  
Péter Fehérvári ◽  
Zoltán Vas ◽  
Szabolcs Solt ◽  
Éva Horváth ◽  
...  
Keyword(s):  
South Africa ◽  
Life History ◽  
Host Species ◽  
Life History Traits ◽  
Population Parameters ◽  
Model Species ◽  
Host Parasite Interactions ◽  
Louse Species ◽  
Host Parasite ◽  
First Time

Abstract Little is known about the louse species harboured by Red-footed and Amur Falcons despite the fact that various life-history traits of these hosts make them good model species to study host-parasite interactions. We collected lice samples from fully grown Amur (n=20) and Red-footed Falcons (n=59), and from nestlings of Red-footed Falcons (n=179) in four countries: Hungary, India, Italy and South Africa. We identified 3 louse species on both host species, namely Degeeriella rufa, Colpocephalum subzerafae and Laembothrion tinnunculi. The latter species has never been found on these hosts. Comparing population parameters of lice between hosts we found significantly higher prevalence levels of D. rufa and C. subzerafae on Amur Falcons. Adult Red-footed Falcons had higher D. rufa prevalence compared to C. subzerafae. For the first time we also show inter-annual shift in prevalence and intensity levels of these species on Red-footed Falcons; in 2012 on adult hosts C. subzerafae had higher intensity levels than D. rufa, however in 2014 D. rufa had significantly higher intensity compared to C. subzerafae. In case of nestlings both louse species had significantly higher preva lence levels than in 2014. The exact causes of such inter-annual shifts are yet to be understood.

scholarly journals Parent-to-offspring transfer of sublethal effects of copper exposure: Metabolic rate and life-history traits of Daphnia

2011 ◽  
Vol 84 (2) ◽  
pp. 195-201 ◽  
Author(s):  
MAURICIO A FERNÁNDEZ-GONZÁLEZ ◽  
JAVIER GONZÁLEZ-BARRIENTOS ◽  
MAURICIO J CARTER ◽  
RODRIGO RAMOS-JILIBERTO
Keyword(s):  
Life History ◽  
Metabolic Rate ◽  
Life History Traits ◽  
Sublethal Effects ◽  
Copper Exposure

scholarly journals Comparative response of Rangifer tarandus and other northern ungulates to climatic variability

Rangifer ◽  
2002 ◽  
Vol 22 (1) ◽  
pp. 33 ◽  
Author(s):  
Robert B. Weladji ◽  
David R. Klein ◽  
Øystein Holand ◽  
Atle Mysterud
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Rangifer Tarandus ◽  
Climatic Variability ◽  
Environmental Stochasticity ◽  
Related Factor ◽  
Population Parameters ◽  
Weather Variables ◽  
Climatic Effects ◽  
Large Herbivores

To understand the factors influencing life history traits and population dynamics, attention is increasingly being given to the importance of environmental stochasticity. In this paper, we review and discuss aspects of current knowledge concerning the effect of climatic variation (local and global) on population parameters of northern ungu¬lates, with special emphasis on reindeer/caribou (Rangifer tarandus). We also restrict ourselves to indirect effects of climate through both forage availability and quality, and insect activity. Various authors have used different weather variables; with sometime opposite trends in resulting life history traits of ungulates, and few studies show consistent effects to the same climatic variables. There is thus little consensus about which weather variables play the most sig¬nificant role influencing ungulate population parameters. This may be because the effects of weather on ungulate pop¬ulation dynamics and life history traits are scale dependent and it is difficult to isolate climatic effects from density dependent factors. This confirms the complexity of the relationship between environment and ecosystem. We point out limits of comparability between systems and the difficulty of generalizing about the effect of climate change broadly across northern systems, across species and even within species. Furthermore, insect harassment appears to be a key climate-related factor for the ecology of reindeer/caribou that has been overlooked in the literature of climatic effects on large herbivores. In light of this, there is a need for further studies of long time series in assessing effects of climate variability on reindeer/caribou.

Sign in / Sign up

Export Citation Format

Share Document