Web-Mediated Interspecific Competition Among Spider Mites

Morimoto, Koji; Furuichi, H.; Yano, Shuichi; Osakabe, Masahiro

doi:10.1093/jee/99.3.678

Cited by 19 publications

(8 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vulnerability of juveniles may be important for both the intraspecific and interspecific interactions with competitors and predators. Juvenile Panonychus mites can become entangled in the complicated webs of Tetranychus mites and frequently die (8). Nevertheless, larvae of the European red mite, Panonychus ulmi (Koch), that hatched on upper leaf surfaces immediately move to lower leaf surfaces (6).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Tolerance to Solar Ultraviolet‐B Radiation in the Citrus Red Mite, An Upper Surface User of Host Plant Leaves

Fukaya

Uesugi

Ohashi

et al. 2012

Photochem & Photobiology

View full text Add to dashboard Cite

Plant-dwelling mites are potentially exposed to solar ultraviolet-B (UVB) radiation that causes deleterious and often lethal effects, leading most mites to inhabit the lower (underside) leaf surfaces. However, in species of spider mite belonging to the Genus Panonychus, a substantial portion of individuals occur on upper leaf surfaces. We investigated whether the upper leaf surfaces of citrus trees are favorable for P. citri, and to what extent they are tolerant to UVB radiation. If eggs are not adequately protected from UVB damage, females may avoid ovipositing on the upper surfaces of sunny leaves. To test this, we conducted laboratory experiments using a UVB lamp, and semioutdoor manipulative experiments. As a result, P. citri eggs are tolerant to UVB. Field studies revealed that the ratio of eggs and adult females on upper leaf surfaces were larger for shaded than for sunny leaves. However, 64-89% of eggs hatched successfully even on sunny upper leaf surfaces. Nutritional evaluation revealed that whether on sunny or shaded leaves, in fecundity and juvenile development P. citri reaped the fitness benefits of upper leaf surfaces. Consequently, P. citri is tolerant to UVB damage, and inhabiting the upper surfaces of shaded leaves is advantageous to this mite.

show abstract

Section: Discussionmentioning

confidence: 99%

“…In contrast to the majority of plant-dwelling mites, a substantial portion of individuals of Panonychus spider mite species reside on the upper leaf surfaces of their host plants (6)(7)(8)(9). However, the effects of UVB radiation on the fitness of Panonychus species have not yet been assessed.…”

Section: Introductionmentioning

confidence: 99%

Tolerance to Solar Ultraviolet‐B Radiation in the Citrus Red Mite, An Upper Surface User of Host Plant Leaves

Fukaya

Uesugi

Ohashi

et al. 2012

Photochem & Photobiology

View full text Add to dashboard Cite

show abstract

“…However, it is possible that the web also affects interspecific interactions among herbivore species, i.e. that it also offers protection against competitors [25].…”

Section: Introductionmentioning

confidence: 99%

A Herbivorous Mite Down-Regulates Plant Defence and Produces Web to Exclude Competitors

et al. 2011

View full text Add to dashboard Cite

Herbivores may interact with each other through resource competition, but also through their impact on plant defence. We recently found that the spider mite Tetranychus evansi down-regulates plant defences in tomato plants, resulting in higher rates of oviposition and population growth on previously attacked than on unattacked leaves. The danger of such down-regulation is that attacked plants could become a more profitable resource for heterospecific competitors, such as the two-spotted spider mite Tetranychus urticae. Indeed, T. urticae had an almost 2-fold higher rate of oviposition on leaf discs on which T. evansi had fed previously. In contrast, induction of direct plant defences by T. urticae resulted in decreased oviposition by T. evansi. Hence, both herbivores affect each other through induced plant responses. However, when populations of T. evansi and T. urticae competed on the same plants, populations of the latter invariably went extinct, whereas T. evansi was not significantly affected by the presence of its competitor. This suggests that T. evansi can somehow prevent its competitor from benefiting from the down-regulated plant defence, perhaps by covering it with a profuse web. Indeed, we found that T. urticae had difficulties reaching the leaf surface to feed when the leaf was covered with web produced by T. evansi. Furthermore, T. evansi produced more web when exposed to damage or other cues associated with T. urticae. We suggest that the silken web produced by T. evansi serves to prevent competitors from profiting from down-regulated plant defences.

show abstract

“…In contrast to many other mites, spider mites in the genus Panonychus (Acari, Tetranychidae) frequently occupy upper leaf surfaces (Foott 1963;Jones and Parrella 1984;Morimoto et al 2006;Osakabe et al 2006). Eggs of the citrus red mite Panonychus citri (McGregor) (Acari: Tetranychidae) show greater resistance to UV-B radiation than do those of T. urticae (Fukaya et al 2013;Osakabe et al 2006).…”

Section: The Minority Of Mites Use Upper Leaf Surfacesmentioning

confidence: 99%

Biological impact of ultraviolet-B radiation on spider mites and its application in integrated pest management

Osakabe

2021

Appl Entomol Zool

View full text Add to dashboard Cite

Many plant-dwelling mites reside on lower leaf surfaces. The biological impact of solar ultraviolet-B (UV-B) radiation on spider mites has been demonstrated over the last decade. Due to the serious problem of acaricide resistance in spider mites, the development of alternative control methods and establishment of an integrated pest management (IPM) strategy are urgently needed, especially for greenhouse horticultural crops such as strawberries. A physical control method for spider mites using UV-B lamps (UV-B method) has been established. Using the UV-B method, simultaneous control of spider mites and powdery mildew, a major disease, is possible, making it is a favorable IPM strategy. Here, I introduce general findings regarding the biological impact of UV radiation on spider mites and phytoseiid mites, useful natural enemies for biological control, over the last decade, including dose response, effective wavelengths, and photoreactivation. Moreover, I introduce the application of UV-B to spider mite control in strawberry greenhouses, including the possibility of concurrent use with biological control via phytoseiid mites, and discuss its possible contributions to IPM.

show abstract

Web-Mediated Interspecific Competition Among Spider Mites

Cited by 19 publications

References 5 publications

Tolerance to Solar Ultraviolet‐B Radiation in the Citrus Red Mite, An Upper Surface User of Host Plant Leaves

Tolerance to Solar Ultraviolet‐B Radiation in the Citrus Red Mite, An Upper Surface User of Host Plant Leaves

A Herbivorous Mite Down-Regulates Plant Defence and Produces Web to Exclude Competitors

Biological impact of ultraviolet-B radiation on spider mites and its application in integrated pest management

Contact Info

Product

Resources

About