Life Table Parameters, Reproductive Rate, Intrinsic Rate of Increase, and Estimated Cost of Rearing Podisus maculiventris (Heteroptera: Pentatomidae) on an Artificial Diet

2001 ◽  
Vol 94 (6) ◽  
pp. 1344-1352 ◽  
Author(s):  
J. L. Wittmeyer ◽  
T. A. Coudron
Keyword(s):  
Life Table ◽  
Artificial Diet ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Podisus Maculiventris ◽  
Life Table Parameters ◽  
Rate Of Increase ◽  
Heteroptera Pentatomidae

Effect of induced resistance in bean plants on Tetranychus urticae life table parameters

2018 ◽  
Vol 23 (8) ◽  
pp. 1627
Author(s):  
Atefeh Dahmardeh ◽  
Malihe Latifi ◽  
Rohollah Saberi Riseh
Keyword(s):  
Life Table ◽  
Tetranychus Urticae ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Life Table Parameters ◽  
Acid Complex ◽  
Net Reproductive Rate ◽  
Bean Plants ◽  
Rate Of Increase

In this study the effects of soil application of potassium phosphite, amino acid complex, and biolog siderophoric on the life table parameters of Tetranychus urticae have been investigated on bean plants, under laboratory conditions. The results revealed significant differences in the total developmental times, oviposition periods, and fecundity of T. urticae among the treatments. The shortest total developmental time and longevity was observed in biolog siderophoric treatment. The intrinsic rate of increase, the net reproductive rate, the finite rate of increase and the mean generation times of T. urticae were remarkably different among the treatments and lower than in the control. The lowest values of these parameters were observed in the biolog siderophoric treatment, which suggests that this inducer could be employed toward a sustainable management of T. urticae.

scholarly journals Biology and life-table of Typhlodromus (Anthoseius) athenas (Acari: Phytoseiidae) fed with the Old World Date Mite, Oligonychus afrasiaticus (Acari: Tetranychidae)

Acarologia ◽  
2018 ◽  
Vol 58 (1) ◽  
pp. 52-61
Author(s):  
Samah Ben Chaaban ◽  
Brahim Chermiti ◽  
Serge Kreiter
Keyword(s):  
Life Table ◽  
Intrinsic Rate ◽  
Phoenix Dactylifera ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Net Reproductive Rate ◽  
Old World ◽  
Rate Of Increase ◽  
Wide Range ◽  
The Mean

The old world date mite Oligonychus afrasiaticus is an important spider mite pest of the date palms Phoenix dactylifera L. mostly in North Africa and the Middle East. A population of the predaceous mite Typhlodromus (Anthoseius) athenas has been recently found in Tunisia in association with a decrease of O. afrasiaticus densities. The objective of this paper was to assess the development and reproduction abilities of T. ( A.) athenas on O. afrasiaticus under laboratory conditions at two temperatures: 27 and 32 °C. The results obtained show that females of T. (A.) athenas develop in 5 days at 27 °C and 4.1 days at 32 °C. The mean fecundity of T. (A.) athenas was 32.1 and 23.2 eggs per female at 27 and 32 °C, respectively. Life table parameters were stimated: the net reproductive rate (Ro) 27.9 and 17.9 eggs/female, the intrinsic rate of increase (rm) 0.322 and 0,344 female/female/day and the mean generation time (T) 10.3 and 8.4 days at 27 and 32 °C, respectively. At both temperatures tested, T. (A.) athenas intrinsic rate of increase was greater than that of O. afrasiaticus (rm = 0.213 at 32 °C,against rm = 0.166 day1 at 27 °C). Typhlodromus (A.) athenas would be able to develop at a wide range of temperatures feeding on O. afrasiaticus and seems to be able to potentially control it.

Temperature-dependent development and life table parameters of Schizotetranychus smirnovi (Acari: Tetranychidae) on Almond

2020 ◽  
Vol 25 (8) ◽  
pp. 1373-1383
Author(s):  
Zarir Saeidi ◽  
Alireza Nemati ◽  
Elham Riahi
Keyword(s):  
Life Table ◽  
Intrinsic Rate ◽  
Mite Species ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Adult Longevity ◽  
Offspring Production ◽  
Temperature Regimes ◽  
Rate Of Increase ◽  
Different Temperatures

In the current study, development, reproduction, and longevity of Schizotetranychus smirnovi Wainstein concerning seven different temperatures including 13±1, 15±1, 20± 1, 25±1, 27±1, 30 ±1 and 35 ±1°C, relative humidity 50 ± 10 % and a photoperiod of 14:10 (L:D) h. were investigated. Due to mite inability to settle on leaf disk, almond young branches were used for conducting life table experiments. Our results indicated that higher and lower temperatures caused a steeper decline in survivorship. The highest survival rate was observed at 25 and 27°C. The mean total development time was significantly decreased with increasing the temperatures; while adult longevity for both female and males significantly decreased. Furthermore, offspring production did not occur at 35°C. The highest values of the intrinsic rate of increase (r) and finite rate of increase (λ) were 0.2563 and 1.2922 d-1 at 27°C, while their lowest values were obtained at 13°C. Again high temperature (30°C) caused a decline in both the reproductive rate and growth rate of this mite species. The longest mean generation time (T) (58.55 d) was at 13 °C and it declined significantly with increasing temperature. The most striking result emerging from our data is that 27°C is the most desirable temperature for not only development but also the reproduction of S. smirnovi. Finally, our obtained information provides a better understanding of the life history of S. smirnovi and its ability to survive and reproduce under different temperature regimes which can be used in the management of this pest.

Biological traits of acarophagous thrips, Scolothrips longicornis (Thysanoptera: Thripidae) on Schizotetranychus smirnovi (Acari: Tetranychidae): Application of female age-specific and age-stage, two-sex life tables

2020 ◽  
Vol 25 (3) ◽  
pp. 512-524
Author(s):  
Marjan Heidarian ◽  
Yaghoub Fathipor ◽  
Amin Sedaratian-jahromi
Keyword(s):  
Life Table ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Biological Efficiency ◽  
Biological Traits ◽  
Net Reproductive Rate ◽  
Female Age ◽  
Rate Of Increase ◽  
Scolothrips Longicornis

Schizotetranychus smirnovi Wainstein is an important phytophagous pest of almond trees which causes serious damage in southwestern Iran. Scolothrips longicornis Priesner has been considered as an efficient predatory thrips that feeds on this spider mite and hence its efficiency for controlling S. smirnovi should be evaluated. In the current study, all main biological parameters of S. longicornis fed on S. smirnovi were determined under laboratory conditions. Data analysis was performed using both female age-specific and age-stage, two-sex life table theories. Duration of incubation, larval, pre-pupal, pupal and pre-adult periods of male predators were 4.73, 3.18, 1.05, 1.86 and 10.82 days, respectively. These periods in female individuals lasted 4.57, 3.92, 1.04, 1.87 and 11.00 days, respectively. Our findings showed that each female laid an average of 62.74 eggs during its ovipositional period (13.61 days). Using the age-stage, two-sex life table, the values of the net reproductive rate (R0), intrinsic rate of increase (r), finite rate of increase (λ) and mean generation time (T) were estimated to be 26.236 (eggs/individual), 0.171 (day-1), 1.186 (day-1) and 19.130 (days), respectively. Using the female age-specific life table, these parameters had different values. Our findings revealed that S. longicornis has a reliable capability to increase its population by feeding on S. smirnovi. This information can expand our knowledge for assessing biological efficiency of this predatory thrips in sustainable management of the destructive mite pest. 

scholarly journals Age Stage Two-Sex Life Table Reveals Sublethal Effects of Some Herbal and Chemical Insecticides on Adults ofBemisia tabaci(Hem.: Aleyrodidae)

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Fatemeh Jafarbeigi ◽  
Mohammad Amin Samih ◽  
Mehdi Zarabi ◽  
Saeideh Esmaeily
Keyword(s):  
Life Table ◽  
Sublethal Effects ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Calotropis Procera ◽  
Thymus Vulgaris ◽  
Net Reproductive Rate ◽  
Rate Of Increase ◽  
Important Pest

The sweetpotato whitefly,Bemisia tabaci(Genn.) (Hem.: Aleyrodidae), is an important pest of agriculture in subtropical and tropical areas. In this study, we used the age-stage two-sex life table to evaluate the sublethal effects of the herbal extracts taken fromFumaria parvifloraLam. (Fumariaceae),Teucrium poliumL. (Lamiaceae),Calotropis procera(Willd.) R. Br. (Asclepiadaceae), andThymus vulgarisL. (Lamiaceae) as well as the two commercial synthetic insecticides, pymetrozin and neemarin. The whiteflies were exposed to each insecticide using leaf-dip method. Analysis of life table parameters revealed significant differences (P≤0.05) in the net reproductive rate (R0,NRR), intrinsic rate of increase (rm), and finite rate of increase (λ) among different insecticides. The lowest values of the three population parameters,R0,r, andλ, were observed on whiteflies treated with pymetrozin (2.455, 0.036, and 1.036),T. polium(2.828, 0.044, and 1.045), and neemarin (2.998, 0.046, and 1.047), respectively. Results of this study highlights the satisfactory insecticidal effects of the extract taken fromT. poliumonB. tabaci, which is comparable to the two commonly used synthetic insecticides.

Resistant rose cultivar affects life table parameters of two-spotted spider mite and its predators Phytoseiulus persimilis and Amblyseius swirskii (Phytoseiidae) 

2019 ◽  
Vol 24 (9) ◽  
pp. 1620-1630 ◽  
Author(s):  
Zahra Alipour ◽  
Yaghoub Fathipour ◽  
Azadeh Farazmand ◽  
Mostafa Khanamani
Keyword(s):  
Life Table ◽  
Phytoseiulus Persimilis ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Net Reproductive Rate ◽  
Resistant Cultivars ◽  
Rate Of Increase ◽  
The Mean ◽  
Two Spotted Spider Mite

Herbivores' host plant resistance may also affect performance of their predators. The effect of susceptible ('Yellow') and resistant ('Roulette') rose cultivars on demographic parameters of the two-spotted spider mite (TSSM), Tetranychus urticae Koch and its predators Phytoseiulus persimilis Athias-Henriot and Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) was determined under laboratory conditions. The obtained data were analyzed using the two-sex life table theory. The development rate of different life stages of TSSM and its predators on the susceptible and resistant rose cultivars were significantly different. Total development time of juvenile stages of TSSM and A. swirskii on the resistant cultivar was longer than that on the susceptible one, although no significant differences were obtained in the case of P. persimilis. By using the two-sex life table, the intrinsic rate of increase (r) of TSSM on the susceptible and resistant cultivars was 0.205 and 0.143 day-1, respectively. In addition, the net reproductive rate (R0) of TSSM on the susceptible and resistant cultivars was 26.46 and 11.47 eggs per individual, respectively; however, the mean generation time (T) of TSSM on these cultivars was 15.92 and 16.92 days, respectively. Furthermore, the value of the intrinsic rate of increase (r) in P. persimilis on the susceptible and resistant cultivars was 0.217 versus 0.163 day-1as well as in A. swirskii on the mentioned cultivars was 0.147 versus 0.117 day-1, respectively. There was no significant difference between the values of the net reproductive rate (R0) in P. persimilis on the susceptible and resistant rose cultivars, but in A. swirskii the value of this parameter on the susceptible cultivar was significantly higher than that on the resistant one. The mean generation time (T) in both predators on the resistant cultivar was longer than the susceptible one. In conclusion, resistance of the rose cultivar negatively affected the population growth parameters of TSSM and its both predators.

Productivity of Neoseiulus bicaudus (Acari: Phytoseiidae) Reared on Natural Prey, Alternative Prey, and Artificial Diet

2019 ◽  
Author(s):  
Jie Su ◽  
Fang Dong ◽  
Si-min Liu ◽  
Yan-hui Lu ◽  
Jian-ping Zhang
Keyword(s):  
Artificial Diet ◽  
Biological Control Agent ◽  
Intrinsic Rate ◽  
Developmental Time ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Alternative Prey ◽  
Net Reproductive Rate ◽  
Natural Prey ◽  
Rate Of Increase

Abstract The predatory mite, Neoseiulus bicaudus (Wainstein), is a potential biological control agent against spider mites and thrips. The objective of this experiment was to compare the effects of three diets on the life table of N. bicaudus. The three diets were 1) Tetranychus turkestani (Ugarov & Nikolskii) (Acari: Tetranychidae), the natural prey of N. bicaudus; 2) Tyrophagus putrescentiae (Schrank) (Acari: Acaridae), an alternative prey; and 3) artificial diet primarily consisting of decapsulated shrimp cysts, egg yolk, and honey. The computer simulation was used to project the population growth of N. bicaudus fed on different diets. The preadult developmental time (3.83 d) of N. bicaudus was shortest, and the intrinsic rate of increase (r = 0.2782 d−1) and the net reproductive rate (R0 = 18.98 offspring) were highest when reared on the alternative prey Ty. putrescentiae. The total development time (7.37 d) was longest, and the population parameters were the lowest (r = −0.0081 d−1, R0 = 0.85 offspring) when N. bicaudus was reared on artificial diet. The population projection showed that the population of N. bicaudus reared on Ty. putrescentiae could increase fast. Our results showed that the Ty. putrescentiae was the most suitable prey for mass rearing of N. bicaudus. The artificial diet could not support the N. bicaudus population and needs to be improved.

Group-rearing did not affect the life table and predation rate of Phytoseiulus persimilis (Acari: Phytoseiidae) fed on Tetranychus urticae

2017 ◽  
Vol 22 (10) ◽  
pp. 1698 ◽  
Author(s):  
Sahar Saemi ◽  
Hasan Rahmani ◽  
Aurang Kavosi ◽  
Hsin Chi
Keyword(s):  
Life Table ◽  
Tetranychus Urticae ◽  
Phytoseiulus Persimilis ◽  
Intrinsic Rate ◽  
Predation Rate ◽  
Reproductive Rate ◽  
Intrinsic Rate Of Increase ◽  
Net Reproductive Rate ◽  
Rate Of Increase ◽  
Negative Effect

To better understand the effect of individual- and group-rearing conditions on predator performance, we studied the life table and predation rate of the predatory mite, Phytoseiulus persimilis Athias-Henriot, after the mites had been individually- or group-reared on two-spotted spider mites, Tetranychus urticae, eggs at 25±1°C, 65±5% RH and a photoperiod of 16: 8 (L:D) h. The net reproductive rate (R0), intrinsic rate of increase (r), net predation rate (C0), finite predation rate (ω) in the individually-reared predators were 40.61 offspring, 0.2594 d-1, 437.3 T. urticae eggs, and 4.8668 preys/d, respectively. Similar values were obtained when the predators were reared in groups (R0 = 43.10 offspring, r = 0.2837 d-1, C0 = 420.9 T. urticae eggs, and ω = 5.9054 preys/d). Mean adult longevities were 28.42 and 25.29 d for group-reared male and female predators, respectively; these values were significantly shorter than those of individual-reared mites (49.87 d for male and 36 d for female). Our results showed that P. persimilis mites could be group-reared in biological control programs without negative effect on their growth and predation potential. 

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 The effects of some botanical insecticides and pymetrozine on life table parameters of silver leaf whitefly Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae)

2013 ◽  
Vol 28 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Reihaneh Barati ◽  
Gholamreza Golmohammadi ◽  
Hamid Ghajarie ◽  
Mehdi Zarabi ◽  
Raziyeh Mansouri
Keyword(s):  
Life Table ◽  
Bemisia Tabaci ◽  
Intrinsic Rate ◽  
Intrinsic Rate Of Increase ◽  
Botanical Insecticides ◽  
Reproduction Rate ◽  
Distilled Water ◽  
Life Table Parameters ◽  
Net Reproductive Rate ◽  
Rate Of Increase

The objective of this research was to assess the effects of extracts of two medicinal plant species: Allium sativum (Linn) and Calotropis procera (Aiton), and a formulation containing azadirachtin on life table parameters of silver leaf whitefly (SLW), Bemisia tabaci biotype B (Gennadius) (Hemiptera: Aleyrodidae), grown on greenhouse tomato plants. The effects were compared to that of pymetrozine, a synthetic insecticide. Bioassays were carried out in a greenhouse under controlled conditions of 27 ? 2?C, R.H. of 55 ? 5% and 16:8 h (L:D) photo period. All treatments significantly affected the survivorship and fertility of SLW female adults, reducing the net reproduction rate, mean generation time and intrinsic rate of increase of this insect. The net reproductive rate [R0] values for the populations treated with garlic extract, milkweed extract, pymetrozine, azadirachtin, control for extracts (ethanol + distilled water) and control for pesticides (distilled water) were 23.58, 19.32, 10.78, 8.23, 49.66, 57.55; the intrinsic rate of increases [rm] were 0.134, 0.139, 0.110, 0.090, 0.177, 0.178; the mean generation times [T] were 23.49, 21.23, 21.66, 23.50, 22.06, 22.69; the doubling times [DT] were 5.14, 4.95, 6.27, 7.56, 3.91, 3.87, and the finite rates of increase [?] were 1.144, 1.149, 1.116, 1.094, 1.193, 1.195, respectively. Azadirachtin had the highest effect on the life table parameters of SLW. Our findings indicated that, although herbal extracts were not effective as much as the chemical insecticides, they can be effective in pest control. Therefore, they are suitable choices for replacing chemical insecticides and for alternative use with azadirachtin in SLW IPM program.

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