Sublethal effects of diflovidazin on life table parameters of two-spotted spider mite Tetranychus urticae (Acari: Tetranychidae)

Sublethal effects of diflovidazin on life table parameters of two-spotted spider mite Tetranychus urticae (Acari: Tetranychidae)

The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) is a serious pest of many agricultural crops. Using chemical pesticides is one of the main methods for its management. In this study, sublethal effects of diflovidazin including LC 5 , LC 10 , LC 20 , and distilled water we...

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Bibliographic Details
Published in:International journal of acarology Vol. 44; no. 2-3; pp. 115 - 120
Main Authors: Havasi, Mohammadreza, Kheradmand, Katayoon, Mosallanejad, Hadi, Fathipour, Yaghoub
Format: Journal Article
Language:English
Published: Philadelphia Taylor & Francis 03-04-2018
Taylor & Francis Ltd
Subjects:
Acari
Age
Chemical pest control
Data processing
Fecundity
Flumite
life table
Oviposition
Pest control
Relative humidity
sublethal effects
Tetranychidae
Tetranychus urticae
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Summary:The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) is a serious pest of many agricultural crops. Using chemical pesticides is one of the main methods for its management. In this study, sublethal effects of diflovidazin including LC 5 , LC 10 , LC 20 , and distilled water were evaluated on biological parameters (such as r, λ, gross reproductive rate, R 0 , and T) of T. urticae. The experiments were done under laboratory condition at 25 ± 2°C, 60 ± 5% relative humidity (RH), and a photoperiod of 16:8 (L: D) hours. The crude data were analysed based on age-stage, two-sex life table analysis. The results indicated significant reduction in female's duration of maturation, oviposition period, and total fecundity by increasing examined dose. The highest and lowest values of the net reproductive rate (R 0 ) were obtained 48.88 and 31.14 offspring/individual in control and LC 20 , respectively. The maximum value of intrinsic rate of increase (r) was 0.234 day −1 that obtained in control treatment, while the minimum value was 0.216 day −1 obtained in LC 20 concentration. Finite rate of increase (λ) had not significantly descended with concentration enhancing from LC 5 to LC 20 compared with the control. The results demonstrated that diflovidazin could be incorporated in integrated pest management programmes of T. urticae.
ISSN:0164-7954
1945-3892
DOI:10.1080/01647954.2017.1417328