scholarly journals Effects of five different melon (Cucumis melo L.) cultivars on population growth of Aphis gossypii (Glover)

2021 ◽  
Vol 57 (No. 4) ◽  
pp. 310-317
Author(s):  
Evin Polat Akkopru ◽  
Serdal Bozkurt
Keyword(s):  
Population Growth ◽  
Pest Management ◽  
Life Table ◽  
Cucumis Melo ◽  
Growth Parameters ◽  
Aphis Gossypii ◽  
Management Program ◽  
Intrinsic Rate Of Increase ◽  
Rate Of Increase ◽  
Aphis Gossypii Glover

 In this study, population growth parameters of Aphis gossypii Glover (Hemiptera: Aphididae) on five different melons [Cucumis melo Linnaeus (Cucurbitaceae) cultivars (Balin, Çıtırex, 221 F1, Gediz, Yusufbey)], which are commonly grown in Turkey, were investigated in laboratory experiments. Life table parameters were estimated according to age-stage and two-sex life table theory. The results showed that A. gossypii developed more successfully on the Gediz cultivar due to the higher intrinsic rate of increase (0.5042 1/day), the finite rate of increase (1.6557 1/day) and the shorter mean generation time (8.161 days) than the other cultivars. Ecological pest control against aphids' use of resistance or less favourable host plant cultivars is considered one of the significant components of pest management. The findings obtained in this study can be used in the pest management program designed for the aphid.

scholarly journals Influence of Temperature on Age-Stage, Two-Sex Life Tables for a Minnesota-Acclimated Population of the Brown Marmorated Stink Bug (Halyomorpha halys)

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 108 ◽  
Author(s):  
Byju N. Govindan ◽  
William D. Hutchison
Keyword(s):  
Population Growth ◽  
Life Table ◽  
Growth Potential ◽  
Intrinsic Rate Of Increase ◽  
Halyomorpha Halys ◽  
Brown Marmorated Stink Bug ◽  
Stink Bug ◽  
Current Limit ◽  
Rate Of Increase ◽  
Survival And Reproduction

Temperature is a critical single factor influencing insect population dynamics, and is foundational for improving our understanding of the phenology of invasive species adapting to new agroecosystems or in the process of range expansion. An age-stage, two-sex life table was therefore developed to analyze fundamental demographic features such as development, survival, and reproduction of a Minnesota-acclimated population of the invasive brown marmorated stink bug (Halyomorpha halys), in the north central USA. All salient life history parameters were estimated to better understand the population growth potential of H. halys at the current limit of its northern range in North America. We examined the effect of selected constant temperatures on immature development and survival (15–39 °C), adult reproduction and longevity (17–36 °C) of H. halys in the laboratory. The Minnesota population developed faster and survived at higher rates relative to a population that had previously established in Pennsylvania, USA. Mean generation time for the Minnesota population was minimized at 30 °C, while survival and fecundity were maximized at 27 and 23 °C, respectively. Given these findings, we assessed the effect of temperature on the intrinsic rate of increase ( r m ), the life table parameter that integrates the effects of temperature on development, survival, and reproduction. A Ratkowsky model predicted r m was maximized (0.0899) at 27.5 °C. We discuss the implications of our findings for understanding population growth rates for H. halys in the context of a warming climate, and potential to emerge as a serious crop pest in the Midwest U.S. region.

scholarly journals PARAMETER NERACA HAYATI DAN PERTUMBUHAN POPULASI KUTU PUTIH Phenacoccus manihoti Matile-Ferrero (HEMIPTERA: PSEUDOCOCCIDAE) PADA DUA VARIETAS UBI KAYU

2014 ◽  
Vol 14 (1) ◽  
pp. 64-70
Author(s):  
Nila Wardani ◽  
Aunu Rauf ◽  
Wayan Winasa ◽  
Sugeng Santoso
Keyword(s):  
Population Growth ◽  
Growth Parameters ◽  
Intrinsic Rate ◽  
Phenacoccus Manihoti ◽  
Intrinsic Rate Of Increase ◽  
Cassava Mealybug ◽  
Rate Of Increase ◽  
Population Growth Parameters ◽  
Cassava Varieties ◽  
Cyanide Content

ABSTRACTThe life history and population growth parameters of mealybug Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) on two cassava varieties. The development, reproduction, and population growth parameters of the cassava mealybug, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) on two cassava varieties were studied in laboratory. The varieties tested were UJ-5 with high cyanide content (>100 mg per kg) dan Adira-1 with low cyanide content (27.5 mg per kg).  Our research revealed that P. manihoti performances were highly affected by cassava varieties.  Incubation period of eggs of P. manihoti were 7.93 ±  0.09 and 8.33 ± 0.11 days, nymphal development periode 12.32±0.13 and 15.67 ± 0.13 days, respectively on UJ-5 and Adira-1. Fecundity averaged 386.37 ± 5.83 on UJ-5 and 318.67±2.81 eggs on Adira-1. Intrinsic rate of increase (rm) were  0.258 ± 0.001 on UJ-5 and  0.220 ± 0.001 on Adira-1. Mean generation time (T) on UJ-5 and Adira-1 were 22.795 ± 0.050 and 25.532 ± 0.047 days, repectively. Our findings showed that variety UJ-5 was more suitable for development and population growth of the cassava mealybug.

Havasi, M., Kheradmand, K., Mosallanejad, H. & Fathipour, Y. (2020) Life history traits and demographic parameters of Neoseiulus californicus McGregor (Acari: Phytoseiidae) treated with the Biomite®. Systematic & Applied Acarology, 25(1), 125–138.

2020 ◽  
Vol 25 (3) ◽  
pp. 411
Author(s):  
Mohammadreza Havasi ◽  
Katayoon Kheradmand ◽  
Hadi Mosallanejad ◽  
Yaghoub Fathipour
Keyword(s):  
Life History ◽  
Life Span ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Life Table ◽  
Reproductive Rate ◽  
Neoseiulus Californicus ◽  
Intrinsic Rate Of Increase ◽  
Rate Of Increase ◽  
Total Life

Knowledge of the effects of pesticides on biological control agents is necessary for the successful implementation of integrated pest management programs. Laboratory bioassays were conducted to evaluate the effects of Biomite®, a natural acaricide, on the life table parameters of Neoseiulus californicus McGregor (Acari: Phytoseiidae), as one of the most important natural enemies of Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions at 25 ± 2°C, 65 ± 5% RH and a photoperiod of 16:8 (L:D) h. The raw data were analyzed based on the two-sex life table theory. Biomite® concentrations LC10 and LC20 gradually and significantly reduced the longevity and total life span of both sexes, as well as total fecundity. Besides, concentration LC20 significantly reduced the gross reproductive rate (GRR) and the net reproductive rate (R0). However, the intrinsic rate of increase (r) and the finite rate of increase (λ) were not significantly affected. Thereby, due to an unfavorable shortened in life history characters of N. californicus such as total life span, reproductive periods and biological parameters (such as R0 and GRR), as a consequence of Biomite® treatment, it can be concluded that this acaricide should not be used with N. californicus in integrated pest management programs.

Life history traits and demographic parameters of Neoseiulus californicus McGregor (Acari: Phytoseiidae) treated with the Biomite® 

2020 ◽  
Vol 25 (1) ◽  
pp. 125-138
Author(s):  
Mohammadreza Havasi ◽  
Katayoon Kheradmand ◽  
Hadi Mosallanejad ◽  
Yaghoub Fathipour
Keyword(s):  
Life History ◽  
Life Span ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Life Table ◽  
Reproductive Rate ◽  
Neoseiulus Californicus ◽  
Intrinsic Rate Of Increase ◽  
Rate Of Increase ◽  
Total Life

Knowledge of the effects of pesticides on biological control agents is necessary for the successful implementation of integrated pest management programs. Laboratory bioassays were conducted to evaluate the effects of Biomite®, a natural acaricide, on the life table parameters of Neoseiulus californicus McGregor (Acari: Phytoseiidae), as one of the most important natural enemies of Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions at 25 ± 2°C, 65 ± 5% RH and a photoperiod of 16:8 (L:D) h. The raw data were analyzed based on the two-sex life table theory. Biomite® concentrations LC10 and LC20 gradually and significantly reduced the longevity and total life span of both sexes, as well as total fecundity. Besides, concentration LC20 significantly reduced the gross reproductive rate (GRR) and the net reproductive rate (R0). However, the intrinsic rate of increase (r) and the finite rate of increase (λ) were not significantly affected. Thereby, due to an unfavorable shortened in life history characters of N. californicus such as total life span, reproductive periods and biological parameters (such as R0 and GRR), as a consequence of Biomite® treatment, it can be concluded that this acaricide should not be used with N. californicus in integrated pest management programs.

scholarly journals The Effect of Prey Density on Life Table Parameters of Hippodamia variegata (Coleoptera: Coccinellidae) Fed on Aphis gossypii (Hemiptera: Aphididae) under Laboratory Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Soodeh Davoodi Dehkordi ◽  
Ahad Sahragard ◽  
Jalil Hajizadeh
Keyword(s):  
Life Table ◽  
Prey Density ◽  
Aphis Gossypii ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Life Table Parameters ◽  
Net Reproductive Rate ◽  
Rate Of Increase ◽  
Hippodamia Variegata ◽  
Preovipositional Period

Life table gives the most comprehensive explanation of the survivorship, development, and reproduction of a population. The life table parameters of ladybeetle, Hippodamia variegata (Coleoptera: Coccinellidae), on different densities (20, 40, 60, 80, and 100) of third instar nymphs of Aphis gossypii were studied in a growth chamber (°C, % RH, and a photoperiod of 16L: 8D h). The adult preovipositional period and the total preovipositional period of female H. variegata were reduced as the prey density increased. The oviposition period was longer when prey density increased. Female longevity also increased significantly with increasing prey density. Fecundity was dependent on prey density. The lowest fecundity was obtained at density of 20 prey () and the highest at density of 100 ( eggs). Intrinsic rate of increase was dependent on prey density and ranged from to  d−1 (female/female/day) with increasing prey density. Net reproductive rate and gross reproductive rate were also increased with increasing prey density. The peak reproductive values were dependent on prey density. However, mean generation time decreased as prey density increased. It was concluded that the increase in the density of A. gossypii nymphs had positive and significant effects on reproductive parameters of H. variegata.

scholarly journals Insecticidal activity and sublethal effects of Beauveria bassiana (Bals.-Criv.) Vuill. isolates and essential oils against Aphis gossypii Glover, 1877 (Hemiptera: Aphididae)

2020 ◽  
Vol 115 (2) ◽  
pp. 463
Author(s):  
Mahdieh MOUSAVI ◽  
Youbert GHOSTA ◽  
Nariman MAROOFPOUR
Keyword(s):  
Essential Oils ◽  
Life Table ◽  
Beauveria Bassiana ◽  
Insecticidal Activity ◽  
Aphis Gossypii ◽  
Population Increase ◽  
Intrinsic Rate Of Increase ◽  
Reproduction Rate ◽  
Net Reproductive Rate ◽  
Rate Of Increase

<p>The cotton aphid, <em>Aphis gossypii</em> Glover, 1877, is a polyphagous species and one of the most important pests of cucumber crops in Iran. In this study, virulence of three <em>Beauveria bassiana </em>(Bals.-Criv.) Vuill isolates, IRAN 108, IRAN 429C and LRC 137, as well as insecticidal activity of two essential oils extracted from <em>Matricaria chamomilla</em> L. and <em>Cuminum cyminum </em>L. were evaluated against adult stage of <em>A. gossypii </em>under laboratory conditions. The data for life table were analyzed using the age-stage, two-sex life table theory. Results showed that all isolates were pathogenic on aphid, but their virulence was varied in different isolates. The lowest calculated LC<sub>50</sub> was belonged to IRAN 429C (3.9 × 10<sup>4</sup>conidia ml<sup>-1</sup>). The lowest LT<sub>50</sub> was obtained at concentration of 10<sup>8</sup> and 10<sup>7</sup> conidia ml<sup>-1</sup> for IRAN 429C (2.9 and 3.55 days, respectively). <em>M. chamomilla</em> essential oil had the lowest LC<sub>50</sub> and LT<sub>50</sub> values (19 µl l<sup>-1</sup> air and 11.4 h), respectively. Longevity and population growth parameters, including the intrinsic rate of increase (<em>r<sub>m</sub></em>), gross reproduction rate (<em>GRR</em>), net reproductive rate (<em>R</em><sub>0</sub>), generation time (<em>T</em>) and finite rate of population increase (<em>λ</em>), were affected negatively by both agents. According to the results obtained in this study, both entomopathogenic fungi and essential oils could be used as an alternative to chemical insecticides in aphid IPM programs.</p>

scholarly journals Life table and demographic parameters of the coccinellid predatory species, Hippodamia convergens Guérin-Méneville (Coleoptera: Coccinellidae) when fed on two aphid species

2020 ◽  
Vol 30 (1) ◽  
Author(s):  
Muhammad Arshad ◽  
Muhammad Irfan Ullah ◽  
Umair Shahid ◽  
Muhammad Tahir ◽  
Malik Imran Khan ◽  
...  
Keyword(s):  
Life Table ◽  
Aphis Gossypii ◽  
Reproductive Rate ◽  
Aphid Species ◽  
Lipaphis Erysimi ◽  
Intrinsic Rate Of Increase ◽  
Demographic Parameters ◽  
Hippodamia Convergens ◽  
Net Reproductive Rate ◽  
Rate Of Increase

Abstract The study aimed to determine the effect of two aphid species; Lipaphis erysimi (Kaltenbach) and Aphis gossypii Glover (Hemiptera: Aphididae) on life table and demographic parameters of Hippodamia convergens Gu`erin-M´eneville (Coleoptera: Coccinellidae). The developmental period of all life stages of H. convergens was shorter when fed on L. erysimi. Net reproductive rate (Ro) was higher (159.85 offspring/individual) on L. erysimi, while it was 87.85 offspring/individual on A. gossypii. Mean generation time (T) was shorter (30.49 d) on L. erysimi than on A. gossypii (45.1 days). Values of the intrinsic rate of increase (r) and finite rate of increase (λ) were calculated as 0.166 days−1 and 1.181 days−1, respectively, on L. erysimi that were higher than on A. gossypii (0.099 days−1 and 1.104 days−1, respectively). Similarly, the survival rate was also higher when the predator was fed on L. erysimi. Overall, the findings suggest using L. erysimi as a better source of prey than A. gossypii for rearing H. convergens.

scholarly journals Ceviz yaprakbitleri (Chromaphis juglandicola (Goeze) (Hemiptera: Callaphididae) ve Panaphis juglandis (Goeze) (Hemiptera:Callaphididae)) ile Beslenen Chrysoperla carnea (Stephen) (Neuroptera: Chrysopidae)’nın Popülasyon Parametrelerinin Belirlenmesi

2020 ◽  
Vol 8 (8) ◽  
pp. 1656-1661
Author(s):  
Mehmet Yılmaz ◽  
Evin Polat Akköprü
Keyword(s):  
Life Table ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Management Program ◽  
Intrinsic Rate Of Increase ◽  
Chrysoperla Carnea ◽  
Net Reproductive Rate ◽  
Rate Of Increase ◽  
Study Population ◽  
Lake Van Basin

Small walnut aphid (Chromaphis juglandicola (Kalt.) (Hem.: Aphididae) and Dusky-veined walnut aphid (Panaphis juglandis) (Goeze) (Hemiptera: Callaphididae) are important pests in walnut orchards in Lake Van Basin, Turkey. Aphids, which are colonized separately in the upper and lower parts of the walnut leaf, cause loss of quality and quantity in the walnut when their population is dense. In this study, population growth rate parameters based on feeding with both aphids of Chrysoperla carnea (Stephen) (Neuroptera: Chrysopidae), which is one of the important predators of the pest, were determined. The experiments were carried out in climatic rooms under 25±10°C, 65±5% humidity and 16: 8 (L: D) h (5,000 lux) lighting time conditions. Life table parameters were estimated according to age-stage, two-sex life table method. The values obtained for the intrinsic rate of increase (r), finite rate of increase (λ), net reproductive rate (R0) and mean generation time (T) were 0.082 d-1, 1.082 d-1, 59.47 offspring and 49.76 d, respectively of C. carnea fed on Chromaphis juglandicola and Panaphis juglandis. Results obtained might be used in pest management program that will be prepared for the aphids.

scholarly journals A laboratory and field condition comparison of life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae)

2015 ◽  
Vol 55 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Behnaz Hosseini-Tabesh ◽  
Ahad Sahragard ◽  
Azadeh Karimi-Malati
Keyword(s):  
Population Dynamics ◽  
Relative Humidity ◽  
Life Table ◽  
Aphis Gossypii ◽  
Field Conditions ◽  
Life Table Parameters ◽  
Laboratory Conditions ◽  
Rate Of Increase ◽  
Aphis Gossypii Glover ◽  
Field And Laboratory Conditions

Abstract Life table studies are essential tools for understanding population dynamics. The life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae) feeding on the host plant, Hibiscus syriacus L. were studied under laboratory (25±1°C and relative humidity of 65±5% and a photoperiod of 16L : 8D h) and field conditions (23-43°C, and relative humidity of 27-95%). The data were analysed using the age-stage, two-sex life table theory. The life table studies were started with 50 and 40 nymphs in laboratory and field conditions, respectively. Under laboratory conditions, A. gossypii reared on H. syriacus had a higher survival rate, fecundity, and longevity than those reared under field conditions. When reared under field conditions, A. gossypii had a longer nymphal developmental time, shorter adult longevity, and lower fecundity than those reared under laboratory conditions. The intrinsic rate of increase (r), net reproductive rate (R0), and the finite rate of increase (λ) under laboratory conditions, were higher than those obtained under field conditions. Nevertheless, there were no significant differences in the mean generation time T (days) between field and laboratory conditions. In the present study, the results clearly showed that life table parameters of A. gossypii were significantly different under field and laboratory conditions. These results could help us to understand the A. gossypii population dynamics under field conditions. The results could also help us make better management decisions for economically important crops

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