scholarly journals Development, reproduction and life table parameters of Tetranychus turkestani (Acari: Tetranychidae) on three different host plants

Acarologia ◽  
2020 ◽  
Vol 60 (3) ◽  
pp. 643-655
Author(s):  
Fereshteh Bazazzadeh ◽  
Parviz Shishehbor ◽  
Mehdi Esfandiari ◽  
Sara Farahi
Keyword(s):  
Life Table ◽  
Host Plants ◽  
Developmental Time ◽  
Phaseolus Lunatus ◽  
Intrinsic Rate Of Increase ◽  
Life Table Parameters ◽  
Net Reproductive Rate ◽  
White Bean ◽  
Red Bean ◽  
Tetranychus Turkestani

The strawberry spider mite, Tetranychus turkestani Ugarov and Nikolski, is one of the most important pests of different field and glasshouse crops in Iran. The objectives of the current study were to determine developmental time, survival, reproduction and life table parameters of T. turkestani on three plant species: cowpea (Vigna unguiculata L.), white bean (Phaseolus lunatus L.) and red bean (Phaseolus calcaratus Roxb.) at 25 ± 1 °C, 60 ± 10 % RH and a photoperiod of 16:8 (L:D). The mean developmental time from egg to adult on cowpea, white bean and red bean were 11.99, 10.43 and 10.46 days, respectively. The total preadult survival rates varied from 75% to 80%. Females of T. turkestani oviposited means of 65.13, 44.03 and 32.69 eggs on cowpea, white bean and red bean, respectively, and had a mean longevity of 13.92, 9.08 and 7.23 days on the same three host plants. The intrinsic rate of increase (rm) varied from 0.18 to 0.21. The net reproductive rate (R0) was higher on cowpea (42.33) than on white bean (24.95) or red bean (14.16). Using these measures, T. turkestani performance was best on cowpea, worst on red bean, and intermediate on white bean.

Impact of citrus species on the biological characteristics and life table parameters of Eutetranychus orientalis (Klein) (Acari: Tetranychidae)

2022 ◽  
Author(s):  
Kemal Yalçin ◽  
İsmail Döker ◽  
Cengiz Kazak
Keyword(s):  
Host Plant ◽  
Life Table ◽  
Plant Species ◽  
Biological Characteristics ◽  
Intrinsic Rate Of Increase ◽  
Citrus Species ◽  
Life Table Parameters ◽  
Net Reproductive Rate ◽  
Host Plant Species ◽  
Rate Of Increase

Biological characteristics and life table parameters of Eutetranychus orientalis (Klein) were revealed on four different citrus species: grapefruit (Citrus paradisi Macf. cv. Star Ruby), lemon (C. limon (L.) Burm. f. cv. Meyer), mandarin (C. reticulata Blanco cv. Okitsu) and orange (C. sinensis L. cv. Washington Navel) under laboratory conditions. Results show that oviposition period, fecundity, and life table parameters varied significantly depending on the host plant species. Furthermore, host plant species had little effect on immature development, except for the teleiochrysalis and total developmental period, which was significantly shorter on lemon (13.77 days for females, 12.67 days for males). Total mean numbers of eggs laid by E. orientalis was 15.92 on mandarin and 29.78 on lemon. In addition, intrinsic rate of increase (rm), net reproductive rate (R0), finite rate of increase (λ) and doubling time (DT) are 0.12 day–1, 10.41 ♀/♀, 1.13 day–1 and 5.59 days for lemon, 0.17 day–1, 22.36 ♀/♀, 1.19 day–1 and 4.04 days for grapefruit, respectively. However, shortest and longest mean generation times (To) were obtained at 18.26 days on orange and 19.37 days on grapefruit. Our results demonstrate that intergeneric differences of Citrus should be considered when determining E. orientalis population abundance and dynamics in field conditions.

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 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.

scholarly journals Effect of Host Plants on Developmental Time and Life Table Parameters of Carposina sasakii (Lepidoptera: Carposinidae) Under Laboratory Conditions

2012 ◽  
Vol 41 (2) ◽  
pp. 349-354 ◽  
Author(s):  
Xihong Lei ◽  
Dingxu Li ◽  
Zheng Li ◽  
Frank G. Zalom ◽  
Lingwang Gao ◽  
...  
Keyword(s):  
Life Table ◽  
Host Plants ◽  
Developmental Time ◽  
Life Table Parameters ◽  
Laboratory Conditions ◽  
Carposina Sasakii

scholarly journals Demographic analysis of sublethal effects of spiromesifen on Neoseiulus californicus (Acari: Phytoseiidae)

Acarologia ◽  
2017 ◽  
Vol 57 (3) ◽  
pp. 571-580
Author(s):  
Maryam Ghadim Mollaloo ◽  
Katayoon Kheradmand ◽  
Reza Sadeghi ◽  
Ali Aasghar Talebi
Keyword(s):  
Life Table ◽  
Sublethal Effects ◽  
Sublethal Effect ◽  
Reproductive Rate ◽  
Neoseiulus Californicus ◽  
Control Treatment ◽  
Intrinsic Rate Of Increase ◽  
Life Table Parameters ◽  
Net Reproductive Rate ◽  
Rate Of Increase

The sublethal effect of spiromesifen on life table parameters of Neoseiulus californicus McGregor (Acari: Phytoseiidae) was evaluated under laboratory conditions 25±1 °C, 65±5% RH and 16:8 (L:D) h. To take both sexes and the variable developmental rate among individuals into consideration, the raw data were analyzed based on the age stage, two sex life table. The estimated values of LC5, LC10 and LC15 for N. californicus are found to be 5.834, 9.529 and 13.267 ppm, respectively. The total preoviposition period of N. californicus treated with sublethal concentrations of spiromesifen was not significantly longer than for the control treatment. The minimum total fecundity was recorded for the LC15 concentration of spiromesifen (19.37 eggs/female) that was significantly different to the LC5 and control treatments. Compared with the control, the intrinsic rate of increase (r), finite rate of increase (λ), net reproductive rate (R0) and gross reproduction rates (GRR) of mites treated by the dose of the LC15 concentration, decreased significantly but the mean generation time (T) was not affected by this sublethal concentration. Our results indicated that increasing concentrations of spiromesifen had significant negative effects on life table parameters of N. californicus.These quantities should not be used in combination with N. californicus in integrated pest management programs in order to obtain optimal of biological control conclusions.

scholarly journals Effects of Delayed Mating on the Reproductive Performance of Henosepilachna vigintioctopunctata (F.) (Coleoptera: Coccinellidae)

Insects ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 629
Author(s):  
Ya-Ling Wang ◽  
Qi-Nian Jin ◽  
Xiang-Ping Wang
Keyword(s):  
Life Table ◽  
Mating Success ◽  
Doubling Time ◽  
Reproductive Rate ◽  
Oviposition Period ◽  
Population Doubling ◽  
Life Table Parameters ◽  
Effective Measure ◽  
Net Reproductive Rate ◽  
Henosepilachna Vigintioctopunctata

Henosepilachna vigintioctopunctata (F.) is a serious pest of numerous solanaceous crops in many Asian countries. The purpose of this study was to clarify the effects of delayed mating on mating success, fecundity, fertility, pre-oviposition period, oviposition period, adult longevity, and population life table parameters (including net reproductive rate, intrinsic and finite rates of increase, doubling time, and mean generation time) of H. vigintioctopunctata. Beginning three days after emergence for both sexes, mating was delayed an additional 0, 2, 4, 6, or 8 days. We compared the data when mating was delayed for males only with the data when mating was similarly delayed for females only. Reproductive and life table parameters were calculated from the two data sets and compared. The results showed that the preoviposition and oviposition period of adults was significantly reduced by delayed mating, while the preoviposition period was not significantly different in adults mated at older ages. The mating success rate, fecundity, and proportion of hatching eggs decreased with increasing mating age. Longevity was not affected by the age at mating. Mating delay also affected the life table parameters of H. vigintioctopunctata, with a similar trend observed in the net reproductive rate and intrinsic and finite rates of increase, all of which decreased gradually as the number of delay days increased. The population doubling time increased with increases in mating age. The results also showed that delayed mating was an effective measure to consider in controlling H. vigintioctopunctata. It is hoped that our data will provide a scientific basis and contribute technical guidance for forecasting and integrated management of this pest.

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.

scholarly journals Nondetrimental impact of two concomitant entomopathogenic fungi on life history parameters of a generalist predator, Coccinella septempunctata (Coleoptera: Coccinellidae)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Muhammad Rizwan ◽  
Bilal Atta ◽  
Muhammad Arshad ◽  
Rashad Rasool Khan ◽  
Asli Dageri ◽  
...  
Keyword(s):  
Side Effects ◽  
Life Table ◽  
Entomopathogenic Fungi ◽  
Coccinella Septempunctata ◽  
Reproductive Rate ◽  
Control Treatment ◽  
Generalist Predator ◽  
Life Table Parameters ◽  
Net Reproductive Rate ◽  
Fecundity Rate

AbstractThe non-persistent impact of biocontrol agents can be revealed for pest control when associated entomopathogenic fungi (EPFs) negatively affect the natural enemies. In this assay, impacts of Beauvaria bassiana (Balsamo) Vuillemin, and Metarhizium anisopliae (Metschnikoff) Sorokin were studied for their compatibility or side effects on life table parameters of an important generalist predator, Coccinella septempunctata L. The results indicated non-significant impacts of both EPFs on life table parameters of C. septempunctata. The development time (egg-adult) was not significantly different in control (69.79 days) and EPFs treated C. septempunctata (69.35–80.07 days). Both fungi did not induce any significant changes in the fecundity, adult pre-oviposition period (APOP), total preoviposition period (TPOP), and mean generation time (T) as compared to control treatment. Similarly, no difference in fecundity rate of C. septempunctata was observed after EPFs treatment (287.7–288.5) compared to control (290.0). The highest net reproductive rate (R0) occurred in control (87.05 offspring individual−1) and M. anisopliae (86.31 offspring individual−1) as compared to B. bassiana treated beetles (76.97 offspring individual−1). The age-specific fecundity curves indicated that the C. septempunctata had a similar fecundity rate in both EPFs treatments and control. This study demonstrates no significant side effects of B. bassiana and M. anispoliae on the performance and biology of C. septempunctata. Considering the compatibility of both EPFs with C. septempunctata, their combinations can be recommended in various integrated pest management programs.

Sign in / Sign up

Export Citation Format

Share Document