Effect of broflanilide on the phytophagous mite Tetranychus urticae and the predatory mite Typhlodromips swirskii

2021 ◽  
Author(s):  
Ning Shen ◽  
Yao Li ◽  
Kipchoge Leviticus ◽  
Xiao Li Chang ◽  
Tao Tang ◽  
...  
Keyword(s):  
Tetranychus Urticae ◽  
Predatory Mite ◽  
Phytophagous Mite ◽  
Typhlodromips Swirskii

scholarly journals Reproductive parameters of Phytoseiulus macropilis (Banks) fed with Tetranychus urticae Koch (Acari: Phytoseiidae, Tetranychidae) in laboratory

2017 ◽  
Vol 77 (1) ◽  
pp. 162-169 ◽  
Author(s):  
G. C. Souza-Pimentel ◽  
P. R. Reis ◽  
C. R. Bonatto ◽  
J. P. Alves ◽  
M. F. Siqueira
Keyword(s):  
Tetranychus Urticae ◽  
Generation Time ◽  
Economic Value ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Reproductive Parameters ◽  
Important Species ◽  
Phytoseiulus Macropilis ◽  
Biological Aspects ◽  
Tetranychus Urticae Koch

Abstract Predatory mites that belong to the Phytoseiidae family are one of the main natural enemies of phytophagous mites, thus allowing for their use as a biological control. Phytoseiulus macropilis (Banks, 1904) (Acari: Phytoseiidae) is among the main species of predatory mites used for this purpose. Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) is considered to be one of the most important species of mite pests and has been described as attacking over 1,100 species of plants in 140 families with economic value. The objective of the present study was to investigate, in the laboratory, the reproductive parameters of the predatory mite P. macropilis when fed T. urticae. Experiments were conducted under laboratory conditions at 25 ± 2 °C of temperature, 70 ± 10% RH and 14 hours of photophase. In addition, biological aspects were evaluated and a fertility life table was established. The results of these experiments demonstrated that the longevity of adult female was 27.5 days and adult male was 29.0 days. The population was estimated to increase approximately 27 times (Ro) in mean generation time (T), which was 17.7 days. Lastly, the mite population grew 1.2 times/day (λ) and doubled every 3.7 days (TD).

The pathogenicity of entomopathogenic fungus Acremonium hansfordii to two-spotted spider mite, Tetranychus urticae and predatory mite Neoseiulus barkeri

2018 ◽  
Vol 23 (11) ◽  
pp. 2173
Author(s):  
Su-Qin Shang ◽  
Yao-Nian Chen ◽  
Ying-Lu Bai
Keyword(s):  
Tetranychus Urticae ◽  
Entomopathogenic Fungus ◽  
Spider Mite ◽  
Crop Yields ◽  
Predatory Mite ◽  
Experimental Conditions ◽  
Neoseiulus Barkeri ◽  
Preoviposition Period ◽  
Two Spotted Spider Mite ◽  
F1 Generation

The two-spotted spider mite, Tetranychus urticae, is an important mite pest worldwide. It often leads to reduced crop yields or poor marketability of the produce and has already developed resistance to many acaricides. In this study, the pathogenicity of the entomopathogenic fungus (EPF), Acremonium hansfordii, to T. urticae and its side effects on the predatory mite Neoseiulus barkeri were compared. The toxicity of A. hansfordii was evaluated on T. urticae at 1.0×104, 1.0×106, 1.0×108 conidia/mL concentrations and predatory mite N. barkeri at 1.0×108 conidia/mL under experimental conditions at 25±1°C, 75±5% RH and 16L: 8D photoperiod. The effects of EPF on the development of the F0 and F1 generation of predatory mites were also assessed at 1.0×108 conidia/mL concentration. The results showed that the corrected mortality of T. urticae at three tested concentrations were 36.67%, 53.67% and 66.33% within 11d, and the median lethal time were 14.39 d, 9.84d and 7.99d, respectively. The corrected mortality of N. barkeri was only 3.9% after 11d at 1×108 conidia/mL concentration. Some hyphae of A. hansfordii were detected on the surface of treated T. urticae but not on N. barkeri body after 7d. After N. barkeri females were treated with 1.0×108 conidia/mL, the preoviposition period of the F0 generation was prolonged 1.56 times and the other life history parameters have no significant differences; similar patterns were also shown in the F1 generation. A. hansfordii showed strong pathogenicity against T. urticae but did not significantly adversely influence N. barkeri. Therefore, the combination of A. hansfordii and N. barkeri has the potential to be used for the control of T. urticae in the future. 

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.

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