Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae)
Abstract
The effects of hexythiazox on life-history traits and demographic parameters of Tetranychus urticae Koch (Acari: Tetranychidae) were evaluated using the age-stage two-sex life table (in fecundity-based and fertility-based variants), with emphasis on its transovarial toxicity. Hexythiazox was applied when T. urticae females were either in the preovipositional period or in the first day of oviposition. In the F-0 generation bioassay, treatments with concentrations of 50, 12.5 and 3.125 mg/l significantly reduced the longevity of females and their fecundity. These effects were mostly the result of mortality of treated females (18-23%) over the 24-h exposure period. Even though the net reproductive rate (R-0) decreased significantly, the intrinsic rate of increase (r), finite rate of increase (lambda) and doubling time (D) were not significantly different from the control. The strongest transovarial toxic effect occurred within the first 4 days following treatment, when 52-89% of the eggs ...laid by treated females (96% in control) hatched. Fertility was significantly reduced by concentrations of 50, 12.5, 3.125, 0.781 and 0.195 mg/l. These concentrations caused significant reductions in R-0 (34-54%), r (12-24%) and lambda (3-5%), whereas D was extended for 0.4-0.7 days. In the F-1 generation bioassay, 50, 12.5, 3.125, 0.781, 0.049 and 0.012 mg/l caused significant reductions in R-0 (34-92%), r (10-68%) and lambda (3-17%), whereas extending D for 0.3-5.6 days. These effects were mostly the consequence of transovarial toxicity. Application of the fecundity-based life table underestimated population-level effects of hexythiazox on T. urticae.
Keywords:
Toxicity / Tetranychus urticae / Sublethal effects / Life tables / HexythiazoxSource:
Experimental and Applied Acarology, 2022, 87, 2-3, 175-194Publisher:
- SPRINGER, DORDRECHT
Projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200214 (Institue of Pesticides and Environmental Protection, Belgrade) (RS-MESTD-inst-2020-200214)
DOI: 10.1007/s10493-022-00733-8
ISSN: 0168-8162
PubMed: 35867194
WoS: 000828984400001
Scopus: 2-s2.0-85134707339
Collections
Institution
Institut za pesticide i zaštitu životne sredineTY - JOUR AU - Musa, Asma AU - Međo, Irena AU - Marić, Ivana AU - Marčić, Dejan PY - 2022 UR - https://ripest.pesting.org.rs/handle/123456789/549 AB - The effects of hexythiazox on life-history traits and demographic parameters of Tetranychus urticae Koch (Acari: Tetranychidae) were evaluated using the age-stage two-sex life table (in fecundity-based and fertility-based variants), with emphasis on its transovarial toxicity. Hexythiazox was applied when T. urticae females were either in the preovipositional period or in the first day of oviposition. In the F-0 generation bioassay, treatments with concentrations of 50, 12.5 and 3.125 mg/l significantly reduced the longevity of females and their fecundity. These effects were mostly the result of mortality of treated females (18-23%) over the 24-h exposure period. Even though the net reproductive rate (R-0) decreased significantly, the intrinsic rate of increase (r), finite rate of increase (lambda) and doubling time (D) were not significantly different from the control. The strongest transovarial toxic effect occurred within the first 4 days following treatment, when 52-89% of the eggs laid by treated females (96% in control) hatched. Fertility was significantly reduced by concentrations of 50, 12.5, 3.125, 0.781 and 0.195 mg/l. These concentrations caused significant reductions in R-0 (34-54%), r (12-24%) and lambda (3-5%), whereas D was extended for 0.4-0.7 days. In the F-1 generation bioassay, 50, 12.5, 3.125, 0.781, 0.049 and 0.012 mg/l caused significant reductions in R-0 (34-92%), r (10-68%) and lambda (3-17%), whereas extending D for 0.3-5.6 days. These effects were mostly the consequence of transovarial toxicity. Application of the fecundity-based life table underestimated population-level effects of hexythiazox on T. urticae. PB - SPRINGER, DORDRECHT T2 - Experimental and Applied Acarology T1 - Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae) EP - 194 IS - 2-3 SP - 175 VL - 87 DO - 10.1007/s10493-022-00733-8 UR - conv_574 ER -
@article{ author = "Musa, Asma and Međo, Irena and Marić, Ivana and Marčić, Dejan", year = "2022", abstract = "The effects of hexythiazox on life-history traits and demographic parameters of Tetranychus urticae Koch (Acari: Tetranychidae) were evaluated using the age-stage two-sex life table (in fecundity-based and fertility-based variants), with emphasis on its transovarial toxicity. Hexythiazox was applied when T. urticae females were either in the preovipositional period or in the first day of oviposition. In the F-0 generation bioassay, treatments with concentrations of 50, 12.5 and 3.125 mg/l significantly reduced the longevity of females and their fecundity. These effects were mostly the result of mortality of treated females (18-23%) over the 24-h exposure period. Even though the net reproductive rate (R-0) decreased significantly, the intrinsic rate of increase (r), finite rate of increase (lambda) and doubling time (D) were not significantly different from the control. The strongest transovarial toxic effect occurred within the first 4 days following treatment, when 52-89% of the eggs laid by treated females (96% in control) hatched. Fertility was significantly reduced by concentrations of 50, 12.5, 3.125, 0.781 and 0.195 mg/l. These concentrations caused significant reductions in R-0 (34-54%), r (12-24%) and lambda (3-5%), whereas D was extended for 0.4-0.7 days. In the F-1 generation bioassay, 50, 12.5, 3.125, 0.781, 0.049 and 0.012 mg/l caused significant reductions in R-0 (34-92%), r (10-68%) and lambda (3-17%), whereas extending D for 0.3-5.6 days. These effects were mostly the consequence of transovarial toxicity. Application of the fecundity-based life table underestimated population-level effects of hexythiazox on T. urticae.", publisher = "SPRINGER, DORDRECHT", journal = "Experimental and Applied Acarology", title = "Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae)", pages = "194-175", number = "2-3", volume = "87", doi = "10.1007/s10493-022-00733-8", url = "conv_574" }
Musa, A., Međo, I., Marić, I.,& Marčić, D.. (2022). Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae). in Experimental and Applied Acarology SPRINGER, DORDRECHT., 87(2-3), 175-194. https://doi.org/10.1007/s10493-022-00733-8 conv_574
Musa A, Međo I, Marić I, Marčić D. Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae). in Experimental and Applied Acarology. 2022;87(2-3):175-194. doi:10.1007/s10493-022-00733-8 conv_574 .
Musa, Asma, Međo, Irena, Marić, Ivana, Marčić, Dejan, "Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae)" in Experimental and Applied Acarology, 87, no. 2-3 (2022):175-194, https://doi.org/10.1007/s10493-022-00733-8 ., conv_574 .