The Bunsen–Roscoe reciprocity law in ultraviolet-B-induced mortality of the two-spotted spider mite Tetranychus urticae

Murata, Yoshitaka; Osakabe, Masahiro

doi:10.1016/j.jinsphys.2012.11.008

Cited by 48 publications

(44 citation statements)

References 27 publications

(34 reference statements)

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“…Artificial UV-B irradiation was reported to reduce the incidence of fungal diseases, such as strawberry powdery mildew (Kanto et al, 2009(Kanto et al, , 2014, rose powdery mildew (Kobayashi et al, 2013), and eggplant leaf mold caused by Mycovellosiella nattrassii (Oka et al, 2011). Moreover, it was reported that UV-B irradiation hindered the survival and reproduction of the herbivorous spider mite Tetranychus urticae (Murata and Osakabe, 2013;Ohtsuka and Osakabe, 2009). The mortalities of adult females, larvae, and eggs of T. urticae were proportional to the cumulative UV-B irradiance to which they were exposed (Murata and Osakabe, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it was reported that UV-B irradiation hindered the survival and reproduction of the herbivorous spider mite Tetranychus urticae (Murata and Osakabe, 2013;Ohtsuka and Osakabe, 2009). The mortalities of adult females, larvae, and eggs of T. urticae were proportional to the cumulative UV-B irradiance to which they were exposed (Murata and Osakabe, 2013). Greenhouse experiments revealed an excellent controlling effect of UV-B irradiation on T. urticae populations on strawberries (Tanaka et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Difference between Nighttime and Daytime UV-B Irradiation with Respect to the Extent of Damage to Perilla Leaves

et al. 2017

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Although ultraviolet-B (UV-B) light (280-315 nm) irradiation effectively controls spider mites in horticultural crop production, it also causes plant damage, leading to growth suppression, changes in morphology, and leaf scorching. However, sensitivity to UV-B varies among plant species. Here, we assessed the effect of UV-B on growing perilla (Perilla frutescens var. crispa) plants. Three experiments were conducted. In the first experiment, plants of the variety 'Akachirimenshiso' were grown in a plastic house with natural light conditions and subjected to three treatments: natural UV (control), −UV, and natural UV plus artificial UV-B treatment (50 mW·m

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Difference between Nighttime and Daytime UV-B Irradiation with Respect to the Extent of Damage to Perilla Leaves

et al. 2017

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“…Biological measures using commercialized natural enemies have been put to practical use (Yang et al 2014), whereas physical measures against spider mites have remained unexploited (Suzuki 2012). Although the use of ultraviolet radiation has recently received broad attention due to its miticidal and repellent effects against spider mites (Ohtsuka and Osakabe 2009;Suzuki et al , 2013Suzuki et al , 2014Sakai and Osakabe 2010;Murata and Osakabe 2014), it may be difficult to apply practically because of the uneven irradiation caused by leaf self-shading. Here, we focused on modification of the atmosphere, which is expected to produce relatively uniform effects throughout the plant because of the rapid diffusion that occurs with gases.…”

Section: Discussionmentioning

confidence: 99%

Deoxidant-induced anoxia as a physical measure for controlling spider mites (Acari: Tetranychidae)

et al. 2015

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Tiny agricultural pests such as spider mites (Acari: Tetranychidae) attached to seedlings grown outdoors often invade greenhouses, thereby triggering pest outbreaks. To solve the problem, we examined whether differences in anoxia tolerance between animals and plants would permit the application of an anoxic environment to control spider mites without the aid of acaricides. Under an anoxic environment created by using a commercial deoxidant at 25 °C, the time for 50 % mortality of eggs, non-diapausing adults (summer form), and diapausing adults (winter form) were 6.1, 5.5, and 23.6 h, respectively, for Tetranychus urticae Koch and 5.4, 3.9, and 23.2 h, respectively, for Tetranychus kanzawai Kishida. With anoxia for 12 h, no eggs and non-diapausing adults survived in either species, whereas most diapausing adults (98 % for T. urticae and 88 % for T. kanzawai) survived. Under this treatment, host Phaseolus vulgaris L. seedlings showed serious physiological disorders in their primary leaves and apical buds, and unusual lateral buds developed in the cotyledon axils. The spider mites acquire anoxia tolerance during diapause, but anoxia can potentially control them during the summer if no negative effects are observed in the treated seedlings.

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“…Similar work was carried out with Tetranychus urticae, but this time aiming to assess the effect of exposure to UV rays. Brief UV exposure periods lead to larvae death and unviable eggs (28). NavasPanadero (14) evaluated the photosynthetically active radiation and its effect on the number of larvae of ticks found in pastures with different silvopastoral arrangements and found no difference between the silvopastoral and more conventional arrangements.…”

Section: (B) Microplusmentioning

confidence: 99%

“…This could lead to a decrease of larvae and viable egg numbers in the pastures, thus obtenidos en individuos tratados con poco tiempo de exposición a los rayos UV fueron la muerte de larvas y la inviabilidad de los huevos (28). Navas (14) evaluó la radiación fotosintética activa y su efecto en el número de larvas de garrapatas que se encuentran en potreros con diferentes arreglos silvopastoriles y no encontró diferencias entre el arreglo silvopastoril y el no silvopastoril.…”

Section: (B) Microplusunclassified

Tick loads in Bos taurus cattle grazing in two contrasting production systems

Rosales

P³

2016

Rev MVZ Córdoba

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Objectives. To relate the effect of biotic and abiotic factors on Rhipicephalus (Boophilus) microplus tick loads on cows grazing either in intensive silvopastoral systems (ISS) (Lucerna) or in grass pastures associated with sugarcane plantations (La Isabela). Materials and methods. Tick counts were performed on 27 Lucerne breed animals that were in different physiological states, six of which were grazing on forage grass paddocks associated with commercial sugarcane plantations and the remaining animals grazed in an ISS based on Leucaena leucocephala and Cynodon plectostachyus. The tick counts were made every 15 days. The data of temperature, humidity, and radiation were taken from a weather station that was inside the ISS. Results. There was a weak relationship between saturation deficit and tick load (R 2 =0.34) and another between UV radiation and tick load (R 2 =0.205) for animals grazing in ISS. There were differences in tick counts when comparing animals of similar productivity from both systems evaluated: in La Isabela (sugarcane grass paddocks) average counts were 311 ticks perceptible to the touch (TPT) and in Lucerna (ISS farm) average counts were 206 TPT (p= 0.02). Additionally, there were greater tick counts in high productivity cows compared to low productivity cows. Conclusions. The abiotic and biotic factors of the ecosystem and animal productivity can affect the TPT counts. In ISS systems, tick counts can be lower than those observed in monoculture grazing systems.Key words: Ectoparasites, microclimate, radiation, saturation deficit (Source: CAB). RESUMENObjetivos. Relacionar el efecto de algunos factores bioticos y abioticos sobre las cargas de la garrapata Rhipicephalus (Boophilus) microplus en hembras bovinas que pastorean en sistemas silvopastoriles intensivos (SSPi)(Lucerna) y en monocultivos asociados a cañaduzales (La Isabela). Materiales y métodos. Se realizaron conteos en 27 animales de raza Lucerna en diferentes estados fisiológicos, seis de los cuales se encontraban pastoreando en lotes de gramíneas forrajeras asociados con plantaciones de caña comerciales y los animales restantes pastoreaban en SSPi basados en Leucaena leucocephala y Cynodon plectostachyus. El conteo de garrapatas se efectuó cada 15 días. Los datos de temperatura, humedad y radiación se tomaron de una estación meteorológica que se encontraba en el interior del SSPi. Resultados. Se encontró una relación débil entre el déficit de saturación y los conteos de garrapatas (R 2 =0.34) y entre la radiación UV y los conteos de garrapatas (R 2 =0.205) Rev.MVZ Córdoba 21(2):5404-5415, 2016. ISSN: 0122-0268 ORIGINAL 5405 para los bovinos pastoreando en SSPi. Hubo diferencia entre los conteos en animales con similar productividad en ambos sistemas evaluados; siendo el promedio total de garrapatas perceptibles al tacto (GPT) de 311 para La Isabela y de 206 GPT para Lucerna (p=0.02). Hubo mayor número de GPT en hembras con mayor productividad en comparación con las de baja productividad (p<0.05). Conclusiones. Los factores b...

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The Bunsen–Roscoe reciprocity law in ultraviolet-B-induced mortality of the two-spotted spider mite Tetranychus urticae

Cited by 48 publications

References 27 publications

Difference between Nighttime and Daytime UV-B Irradiation with Respect to the Extent of Damage to Perilla Leaves

Difference between Nighttime and Daytime UV-B Irradiation with Respect to the Extent of Damage to Perilla Leaves

Deoxidant-induced anoxia as a physical measure for controlling spider mites (Acari: Tetranychidae)

Tick loads in Bos taurus cattle grazing in two contrasting production systems

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