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26 results for “Macrosiphum”
FIGURE 2 in Macrosiphum edrossi Essig, 1953 (Hemiptera, Aphididae): Second World Record, Redescription and Biological and Taxonomic Notes
FIGURE 2. Macrosiphum edrossi. (A-B) Apterous viviparous female; (C) Alate viviparous female. (A) End of antennal segment V, antennal segment VI; (B) Antennal segments II and III; (C) Antennal segments I, II and III. FIGURE 3. Macrosiphum edrossi, apterous viviparous female. (A) Frontal leg, without coxa and trochanter; (B) Medial leg, without coxa and trochanter; (C) Hind leg, without coxa. FIGURE 4. Macrosiphum edrossi, apterous viviparous female. (A) Left posterior part of abdomen, siphunculus, cauda and genital and anal plates are visible; (B) ventral face of siphunculus. (C) dorsal face of siphunculus.
Figure 2 in Inter - and intraspecific relationships between Macrosiphum rosae (Hemiptera: Aphididae) and Chrysoperla externa (Neuroptera: Chrysopidae)
Figure 2 Accumulated predatory efficiency and survival of Chrysoperla externa larvae fed aphids at different ages (A) (I - 2nd and 3rd instars; II - 4th instar and adults) of Macrosiphum rosae, according to the predator:prey ratio (Ra) and aphid density 24 (a, b), 48 (c, d), and 72 hours (e, f) after the release of the species. Different letters indicate significant differences between treatments according to Tukey's multicomparison test (p <0.05) (GLM, quasibinomial).
Figure 1 in Inter - and intraspecific relationships between Macrosiphum rosae (Hemiptera: Aphididae) and Chrysoperla externa (Neuroptera: Chrysopidae)
Figure 1 Mean daily number (± SE) of younger (second- and third-instar) and older (fourth-instar and adult) Macrosiphum rosea specimens consumed by first-, second-, and third-instar larvae of Chrysoperla externa. Different letters above the columns, uppercase for the larval stages of the chrysopid and lowercase for the aphid ages, indicate significant differences between the treatments according to Tukey's multicomparison test (p <0.05). L1, L2, and L3 = larvae of the first, second, and third instars of the chrysopid; N2-3 = second- and third-instar nymphs of the aphid; N4-Adult = fourth-instar and adult aphids.
Figs. 1–2. Macrosiphum glawatz. 1 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Figs. 1–2. Macrosiphum glawatz. 1, Head capsule and antennal segments I of aptera, dorsum. 2, Head capsule and antennal segments I of aptera, ventral surface.
Figs. 17–20. Macrosiphum mentzeliae. 17, Aptera a.s. III. 18, Alata a.s. III. 19 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Figs. 17–20. Macrosiphum mentzeliae. 17, Aptera a.s. III. 18, Alata a.s. III. 19, Siphunculus of aptera. 20, Siphunculus of alata.
Figs. 5–8. Macrosiphum glawatz. 5, Aptera a.s. III. 6, Alata a.s. III. 7 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Figs. 5–8. Macrosiphum glawatz. 5, Aptera a.s. III. 6, Alata a.s. III. 7, Siphunculus of aptera. 8, Siphunculus of alata.
Figs. 15–16. Macrosiphum mentzeliae. 15 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Figs. 15–16. Macrosiphum mentzeliae. 15, Head capsule and antennal segments I of alata, dorsum. 16, Head capsule and antennal segments I of alata, ventral surface.
Figs. 3, 4. Macrosiphum tonantzin. 3 in A New Species Of Macrosiphum Passerini (Hemiptera: Aphididae) From Mexico On The Introduced Plant Pittosporum Undulatum Ventenat (Pittosporaceae)
Figs. 3, 4. Macrosiphum tonantzin. 3, Head capsule and antennal segments I of aptera, dorsum. 4, Head capsule and antennal segments I of aptera, ventral surface.
FIGURE 7–10 in A new species of Macrosiphum (Hemiptera: Aphididae) living on Silene (Caryophyllaceae)
FIGURE 7–10. Macrosiphum ginajo: 7, ANT I–II and basal part of ANT III of aptera showing typical ornamentation on ANT I–II; 8, ANT I–II and basal part of ANT III of aptera showing a specimen with reduced ornamentation on ANT II and an unusual tuberculate small rhinaria on ANT III; Macrosiphum aetheocornum: 9, ANT I–II and basal part of ANT III of aptera, a specimen with relatively heavy ornamentation on ANT II common tuberculate small rhinaria on ANT III; 10, ANT I–II and basal part of ANT III of aptera, a specimen with relatively typical ornamentation on ANT II. The scale bar equals 100 microns and applies to all four figures.
FIGURE 1–6 in A new species of Macrosiphum (Hemiptera: Aphididae) living on Silene (Caryophyllaceae)
FIGURE 1–6. Macrosiphum ginajo: 1, head and ANT I of aptera, ventral surface on the left featuring the cluster of small spinules, dorsal surface on the right; 2, head and ANT I of alata, dorsal surface; 3, R III and R IV + V of aptera; 4, siphunculus of aptera; 5, ANT III of alata; 6, tarsus of aptera. All scale bars equal 100 microns.
FIGURE 11–13 in A new species of Macrosiphum (Hemiptera: Aphididae) living on Silene (Caryophyllaceae)
FIGURE 11–13. Macrosiphum ginajo: 11, cauda of aptera, a specimen with cauda broad basally and triangular–shaped; 12, cauda of aptera, a specimen with a more finger–like parallel–sided cauda; Macrosiphum aetheocornum: 13, siphunculus of aptera. All scale bars equal 100 microns.
FIGURES 1–8 in A new Caryophyllaceae-feeding species of Macrosiphum (Hemiptera: Aphididae) in Republic of Georgia, and a redescription of Macrosiphum hartigi Hille Ris Lambers
FIGURES 1–8. Macrosiphum eastopi Barjadze & Blackman sp. n. apterous viviparous female. 1. ANT IV–VI (bar: 300 µm); 2. Anterior part of body (bar: 200 µm); 3. Head with ANT I–II (bar: 200 µm); 4. Posterior part of abdomen with SIPH and cauda (bar: 200 µm); 5. ANT II–III (bar: 200 µm); 6. HT II (bar: 50 µm); 7. URS (bar: 50 µm); 8. Subgenital plate (bar: 200 µm).
FIGURES 9–13 in A new Caryophyllaceae-feeding species of Macrosiphum (Hemiptera: Aphididae) in Republic of Georgia, and a redescription of Macrosiphum hartigi Hille Ris Lambers
FIGURES 9–13. Macrosiphum eastopi Barjadze & Blackman sp. n. alate viviparous female. 9. ANT III (bar: 200 µm); 10. Habitus (bar: 200 µm); 11. Head with ANT I–II (bar: 200 µm); 12. Posterior part of abdomen with SIPH and cauda (bar: 200 µm); 13. ANT IV–VI (bar: 500 µm).
FIGURES 20–24. Macrosiphum hartigi Hille Ris Lambers, 1947. apterous viviparous female. 20 in A new Caryophyllaceae-feeding species of Macrosiphum (Hemiptera: Aphididae) in Republic of Georgia, and a redescription of Macrosiphum hartigi Hille Ris Lambers
FIGURES 20–24. Macrosiphum hartigi Hille Ris Lambers, 1947. apterous viviparous female. 20. ANT III (bar: 200 µm); 21. Rostral segments II–V (bar: 200 µm); 22. Tarsus (bar: 200 µm); 23. Cauda (bar: 200 µm); 24. SIPH (bar: 200 µm).
FIGURES 14–19 in A new Caryophyllaceae-feeding species of Macrosiphum (Hemiptera: Aphididae) in Republic of Georgia, and a redescription of Macrosiphum hartigi Hille Ris Lambers
FIGURES 14–19. Habitus of different morphs of Macrosiphum hartigi Hille Ris Lambers, 1947 and Macrosiphum eastopi Barjadze & Blackman sp. n. Macrosiphum hartigi. Fundatrix (bar: 1 mm); 15. Apterous viviparous female from co-type series (bar: 1 mm); 16. Oviparous female (bar: 1 mm); 17. Alate viviparous female (bar: 1 mm); 18. alate male (bar: 1 mm); Macrosiphum eastopi sp. n. 19. alate male (bar: 500 µm).
Figs. 15–16. Macrosiphum mentzeliae. 15 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Figs. 15–16. Macrosiphum mentzeliae. 15, Head capsule and antennal segments I of alata, dorsum.
Fig. 25 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Fig. 25. The type slide of Macrosiphum potentillicaulis Miller in the USNM
Data from: Susceptibility of Macrosiphum euphorbiae to the parasitoid Aphidius ervi: larval development depends on host aphid genotype
The potato aphid, Macrosiphum euphorbiae Thomas (Hemiptera: Aphididae: Macrosiphini), is a common polyphagous aphid in Europe and North America. However, the factors influencing potato aphid dynamics and susceptibility to natural enemies are largely undescribed, particularly in relation to facultative endosymbiotic bacteria, which can provide protection against parasitism and disease in some aphid species. This study investigated whether potato aphid susceptibility to one of its principal natural enemies, the parasitoid Aphidius ervi Haliday (Hymenoptera: Braconidae: Aphidiinae), varied in relation to aphid genotype and/or endosymbiont presence. Parasitism and aphid fitness assays were conducted on clonal lineages of aphids, harbouring their natural endosymbiont infections, collected over 3 years from separate geographic locations. Parasitized aphids were dissected to quantify parasitoid oviposition, larval development, and mummification. Amongst the 19 clonal lines of M. euphorbiae tested, seven aphid genotypes were identified, and 11 lines harboured one or both of the facultative endosymbionts Hamiltonella defensa Moran et al. and Regiella insecticola Moran et al.; H. defensa infections were associated exclusively with two of the seven M. euphorbiae genotypes. Parasitism resistance was detected in clonal lines belonging to a single aphid genotype and resulted from failure of parasitoid eggs to develop into larvae rather than failure of the parasitoid to oviposit. Contrary with studies of several other aphid species, there was little evidence that H. defensa provided strong protection to M. euphorbiae from parasitism by A. ervi. Furthermore, there were no clear fitness costs to the aphid associated with parasitism resistance or with H. defensa infection. The two M. euphorbiae genotypes in which H. defensa occurred, which included the resistant genotype, exhibited faster development, higher survival, and greater fecundity than the other five aphid genotypes. These findings suggest that biological control of M. euphorbiae using A. ervi alone could exacerbate pest problems by selecting for the fittest parasitism-resistant genotypes.
Data from: Susceptibility of Macrosiphum euphorbiae to the parasitoid Aphidius ervi: larval development depends on host aphid genotype
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Figs. 21–24. Macrosiphum mentzeliae. 21 in New Macrosiphum Passerini (Hemiptera: Aphididae) Information From Western North America, Including One New Species And One New Synonymy
Figs. 21–24. Macrosiphum mentzeliae. 21, Cauda of aptera, ventral surface. 22, Cauda of aptera, dorsal surface. 23, Aptera u.r.s. 24, Aptera metatarsus.
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