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319 results for “spider mite”
Data from: Environmental stress influences reproductive success in male spider mites
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Data from: Population-specific effect of Wolbachia on the cost of fungal infection in spider mites
<p>Many studies have revealed the ability of the endosymbiotic bacterium <i>Wolbachia </i>to protect its arthropod hosts against diverse pathogens. However, as <i>Wolbachia </i>may also increase the susceptibility of its host to infection, predicting the outcome of a particular <i>Wolbachia</i>-host-pathogen interaction remains elusive. Yet, understanding such interactions and their eco-evolutionary consequences is crucial for disease and pest control strategies. Moreover, how natural <i>Wolbachia </i>infections affectartificially introduced pathogens for biocontrol has never been studied. <i>Tetranychus urticae </i>spider mites are herbivorous crop pests, causing severe damage on numerous economically important crops. Due to the rapid evolution of pesticide resistance, biological control strategies using entomopathogenic fungi are being developed. However, although spider mites are infected with various <i>Wolbachia </i>strains worldwide, whether this endosymbiont protects them from fungi is as yet unknown. Here, we compared the survival of two populations, treated with antibiotics or naturally harbouring different <i>Wolbachia </i>strains, after exposure to the fungal biocontrol agents <i>Metarhizium brunneum </i>and <i>Beauveria bassiana</i>. To control for potential effects of the bacterial community of spider mites, we also compared the susceptibility of two populations naturally uninfected by <i>Wolbachia</i>, treated with antibiotics or not. In one population, <i>Wolbachia</i>-infected mites had a better survival than uninfected ones in absence of fungi but not in their presence, whereas in the other population <i>Wolbachia </i>increased the mortality induced by <i>B. bassiana</i>. In one naturally <i>Wolbachia</i>-uninfected populations, the antibiotic treatment increased the susceptibility of spider mites to <i>M. brunneum</i>, but it had no effect in the other treatments. These results suggest that natural <i>Wolbachia </i>infections may not hamper and may even improve the success of biological control using entomopathogenic fungi. However, they also draw caution on the generalization of such effects, given the complexity of within-host pathogens interaction and the potential eco-evolutionary consequences of the use of biocontrol agents for <i>Wolbachia</i>-host associations.</p>
Data from: Inter- and intra-specific variation of spider mite susceptibility to fungal infections: implications for the long-term success of biological control
<p><span><span><span><span><span><span><span><span><span><span><span>Spider mites are severe pests of several annual and perennial crops worldwide, often causing important economic damages. As rapid evolution of pesticide resistance in this group hampers the efficiency of chemical control, alternative control strategies, such as the use of entomopathogenic fungi, are being developed. However, while several studies have focused on the evaluation of the control potential of different fungal species and/or isolates as well as their compatibility with other control methods (e.g. predators or chemical pesticides), knowledge on the extent of inter- and intraspecific variation in spider mite susceptibility to fungal infection is as yet incipient. Here, we measured the mortality induced by two generalist fungi, <i>Beauveria </i><i>bassiana </i>and <i>Metarhizium </i><i>brunneum</i>, in 12 spider mite populations belonging to different <i>Tetranychus </i>species: <i>T. evansi</i>, <i>T. ludeni</i>, the green form of <i>T. urticae </i>and the red form of <i>T. urticae</i>, within a full factorial experiment. We found that spider mite species differed in their susceptibility to infection by both fungal species. Moreover, we also found important intraspecific variation for this trait. These results draw caution on the development of single strains as biocontrol agents. Indeed, the high level of intraspecific variation suggests that (a) the one-size-fits-all strategy may fail to control spider-mite populations and (b) hosts resistance to infection may evolve at a rapid pace. Finally, we propose future directions to better understand this system and improve the long-term success of spider mite control strategies based on entomopathogenic fungi.</span></span></span></span></span></span></span></span></span></span></span></p>
FIGURE 2 in Surveys for natural enemies of the tomato red spider mite Tetranychus evansi (Acari: Tetranychidae) in northeastern and southeastern Brazil
FIGURE 2: Number and species of predatory mites found on solanaceous plants in northeastern Brazil, A. during the rainy season; B. during the dry season.
FIGURE 1 in Surveys for natural enemies of the tomato red spider mite Tetranychus evansi (Acari: Tetranychidae) in northeastern and southeastern Brazil
FIGURE 1. Survey points in northeastern (thickblack boundaries) and southeastern (grey boundaries) Brazil.
FIGURE 3 in Surveys for natural enemies of the tomato red spider mite Tetranychus evansi (Acari: Tetranychidae) in northeastern and southeastern Brazil
FIGURE 3: Number and species of predatory mites found on solanaceous plants in southeastern Brazil A. during the rainy season; B. during the dry season.
FIGURES 8–11. Oligonychus camelliae n in Five species of spider mites (Acari: Prostigmata: Tetranychidae) from Japan with descriptions of two new species
FIGURES 8–11. Oligonychus camelliae n. sp. 8, tarsus and tibia I (female); 9, tarsus and tibia II (female); 10, tarsus and tibia I (male); 11, tarsus and tibia II (male).
FIGURES 1–7. Oligonychus camelliae n in Five species of spider mites (Acari: Prostigmata: Tetranychidae) from Japan with descriptions of two new species
FIGURES 1–7. Oligonychus camelliae n. sp. 1, dorsum (female); 2, distal segment of palpus (female), with other spinneret and dorsal sensillum; 3, distal segment of palpus (male), with other spinneret; 4, peritreme (female); 5–7, aedeagi (5, holotype).
FIGURES 25–33. Tetranychus misumaiensis n in Five species of spider mites (Acari: Prostigmata: Tetranychidae) from Japan with descriptions of two new species
FIGURES 25–33. Tetranychus misumaiensis n. sp. 25, distal segment of palpus (female); 26, distal segment of palpus (male); 27, peritreme (female); 28–29, aedeagi; 30, tarsus and tibia I (female); 31, tarsus and tibia II (female); 32, tarsus and tibia I (male, holotype), with enlarged empodium I (schematic); 33, tarsus and tibia II (male).
FIGURES 9–16 in False spider mites of the genus Pentamerismus McGregor (Acari: Tenuipalpidae) from Iran
FIGURES 9–16. Pentamerismus behshahricus sp. nov., (female); 9. dorsum; 10. venter, 11. palp; 12. infracapitulum; 13. leg I; 14. leg II; 15. leg III; 16. leg IV.
FIGURES 17–24 in False spider mites of the genus Pentamerismus McGregor (Acari: Tenuipalpidae) from Iran
FIGURES 17–24. Pentamerismus judiciarus DeLeon (female): 17. dorsum; 18. venter 19. palp; 20. infracapitulum; 21. leg I; 22. leg II; 23. leg III; 24. leg IV.
FIGURES 1–8 in False spider mites of the genus Pentamerismus McGregor (Acari: Tenuipalpidae) from Iran
FIGURES 1–8. Pentamerismus ueckermanni sp. nov., (female): 1. dorsum (female); 2. venter 3. palp; 4. infracapitulum; 5. leg I; 6. leg II; 7. leg III; 8. leg IV.
FIGURE 22 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 22. Neonidulus tereotus sp. nov. larva legs I-III, chaetotaxy indicated (right legs). Scale bar = 50μm.
FIGURE 11 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 11. Neonidulus tereotus sp. nov. female legs I–IV, chaetotaxy indicated (I-II right abaxial, III-IV right adaxial aspect). Scale bar = 100μm.
FIGURE 6 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 6. Neonidulus falsicornus (Zhang & Martin) larva, posterior dorsum (slightly twisted off-centre). Scale bar = 50μm.
FIGURE 3 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 3. Neonidulus falsicornus (Zhang & Martin) empodia, A. deutonymph empodium III, lateral aspect showing the ventral prong is the strongest of three; B. male empodium I, ventral aspect showing the pair of three-pronged structures; C. male empodium I, lateral aspect; D. male empodium III, lateral aspect showing the ventral prong is the strongest of three. Scale bar = 20μm.
FIGURE 5 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 5. Neonidulus falsicornus (Zhang & Martin) deutonymph, posterior dorsum. Scale bar = 50μm.
FIGURE 15 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 15. Neonidulus tereotus sp. nov. adult male legs I–IV, chaetotaxy indicated (I, III-IV left adaxial, II right abaxial aspect). Scale bar = 100μm.
FIGURE 10 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 10. Neonidulus tereotus sp. nov. female, A. palp, with detail of spinneret (suζ); B. variation in peritreme. Scale bar = 50 μm.
FIGURE 2 in New spider mite genus (Prostigmata: Tetranychidae) from Australia & New Zealand, with a discussion of Yezonychus Ehara
FIGURE 2. Neonidulus cornus (Pritchard & Baker), A. female empodium dorsal aspect (n.b. split into two structures); B. female empodium lateral aspect, showing ventral prong stronger than two dorsal prongs; C. holotype male empodium dorsal aspect; D. holotype male empodium detail, ventral aspect; E. holotype male right leg I, abaxial aspect. Scale bar A–D = 20μm; E = 100 μm.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.