Effects of ultraviolet radiation on<scp><i>Culex quinquefasciatus</i></scp>immature stages

Munawar, Kashif; Alahmed, Azzam; Khalil, Sayed M.S.

doi:10.1111/1748-5967.12494

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Their full sun treatment reduced larval survival, had no effect on developmental times or wing lengths but increased the metabolic rates of both species. Munawar et al (2021) treated Culex quinquefasciatus Say 1823 with UV‐C and showed that for each larval instar, there was an association between exposure time and mortality with the earlier instars being the more susceptible. Pupae were ~three‐fold more resistant than fourth instar larvae.…”

Section: Introductionmentioning

confidence: 99%

Arthropods and ultraviolet radiation: Survival, growth and development

Holford,

Parajuli,

Beattie

et al. 2024

Ecological Entomology

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Ultraviolet radiation (UVR) has positive and negative impacts on organisms and affects entire ecosystems. It is currently receiving attention because of the interactions of UVR with changes in climate that are likely to affect agriculture and food security. A review is provided on the effects of different types of UVR on the survival, development and reproduction of insects, collembolans and mites. The foci are on how UVR is used in pest control and how it affects arthropod coloration and distribution. Direct exposure to UV‐A, UV‐B and UV‐C delays development and reduces survival and host‐seeking ability of arthropods; immature stages are more sensitive than the adults. Increased exposure of crops to UVR has indirect effects on herbivory, and regions with high UVR levels may permit crop production in the absence of certain pest insect species. The Bunsen‐Roscoe law of reciprocity was upheld for Diaphorina citri and Tetranychus urticae under the range of irradiances and durations of exposure used in two studies, which showed that, for a constant dose, the effects of low irradiances of long durations were equivalent to those of higher irradiances of shorter durations. DNA damage caused by UV‐C and UV‐B can be repaired by photoreactivation; both white light and UV‐A are effective.

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Section: Introductionmentioning

confidence: 99%

Arthropods and ultraviolet radiation: Survival, growth and development

Holford,

Parajuli,

Beattie

et al. 2024

Ecological Entomology

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Effect of ultraviolet radiation (UVC) on Bemisia tabaci eggs

O’Hearn

2023

Preprint

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Bemisia tabaci, the silverleaf whitefly, is a serious pest, and vector for disease, in many agricultural crops. The current common control strategy for this pest is applications of chemical synthetic insecticides. Resistance to several insecticides has already been observed in this species. If non-chemical control options were available, their use could reduce the reliance of insecticides and help slow insecticide resistance in this whitefly. Ultraviolet (UV) radiation is nonvisible radiation with wavelengths ranging from 100 nm to 400 nm. UVC, wavelengths 100 nm to 280 nm, has been found to have insecticidal properties. UVC radiation of wavelength 254 was tested on B. tabaci eggs at 2 different distances, 49.5 cm and 30.5 cm, and at 4 different times, 15 (s), 30 (s), 60 (s), and 90 (s) per distance to see what effect they had on the eggs of B. tabaci. All UVC applications tested had a significant reduction in hatching when compared to the control based on an analysis of variance (One-way ANOVA) and pos-hoc Tukey HSD test. LD50, LD90, and LD95 were calculated. At 49.5 cm irradiation times were found to be, LD50 = 31.8 (s), LD90 = 86.9 (s), and LD95 = 80.5 (s). For the 30.5 cm distance irradiation times were, LD50 = 19.2 (s), LD90 = 63.1 (s), and LD95 = 75.5 (s). This study shows that UVC might be a viable non-chemical control option for controlling B. tabaci.

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Effect of UV radiation on life table parameters of the Phthorimaea operculella Zeller (Lep.: Gelechiidae)

Pero,

Aramideh,

Mirfakhraei

et al. 2024

J. Entomol. Soc.

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Potato tuber moth (PTM), Phthorimaea operculella Zeller (Lep.: Gelechiidae), is one of the key pests of potato in the fields and warehouses of this product. Considering that potato is one of the important sources of human food, the control of this pest by different and especially non-chemical methods is of interest to researchers. Therefore, in this research, the effect of UV-C radiation on the population parameters of PTM was examined in laboratory conditions at 0, 4, 6 and 8 minutes on one-and three-day-old eggs. Based on the results, the intrinsic rate of population increase (r) and the finite rate of population increase (λ) under the influence of different times of UV-C radiation in one and three-day-old eggs with an increase in the duration of radiation yield decreased, and this decrease was more in three-day-old eggs than one-day-old eggs. The longest length of immature period was obtained in three-day-old eggs irradiated with UV-C radiation (37.67 days) in 8 minutes treatment. The shortest lifespan of adult female in one-day-old and three-day-old eggs was estimated 8.58 and 8.38 days at the time of 8 minutes of irradiation, respectively. The lowest net reproductive rate (R 0 ) in three-day-old eggs at 0, 4, 6, and 8 minutes of irradiation was obtained 4.54, 3.28, 0.98, and 0.28 (female offspring), respectively. The maximum mean generation time (T) in three-day-old eggs was recorded as 42.86 days in the treatment of 8 minutes of irradiation. The obtained results show the negative effects of ultraviolet radiation on biological parameters and population growth of PTM. Therefore, UV-C irradiation may be considered in the integrated management of this pest in the storage stage.

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Effects of ultraviolet radiation onCulex quinquefasciatusimmature stages

Cited by 3 publications

References 35 publications

Arthropods and ultraviolet radiation: Survival, growth and development

Arthropods and ultraviolet radiation: Survival, growth and development

Effect of ultraviolet radiation (UVC) on Bemisia tabaci eggs

Effect of UV radiation on life table parameters of the Phthorimaea operculella Zeller (Lep.: Gelechiidae)

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