Bactrocera
umbrosa , Dacus umbrosus Fabricius, Bactrocera fasciatipennis
Doleschall, Dacus diffusus Walker, Dacus fascipennis Wiedemann, Dacus
frenchi Froggatt, Strumeta conformis Walker
Oleh:
Bambang Purnomo
Secara ringkas: tubuhnya
berwarna campuran hitam dan kuning. Lalat buah dewasa ukurannya sedang dan berwarna kuning dan sayapnya datar.
Pada tepi ujung sayap ada bercak-bercak coklat kekuningan. Abdomennya ada
pita-pita hitam, sedangkan thoraxnya ada bercak-bercak kekuningan. Ovipositornya
terdiri dari tiga ruas dengan bahan seperti tanduk yang keras.
Menurut: L.E.
Carroll, I.M. White, A. Freidberg, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson.
2002 onwards. Pest fruit flies of the world. Version: 8th December 2006. http://delta-intkey.com’ disebutkan bahwa (dalam bhs Inggris) :
Head. Number of frontal bristles two pairs.
Number of orbital bristles one pair. Anterior orbital bristle of male normal,
unmodified. Posterior orbital bristles reclinate; acuminate. Ocellar bristles
absent or minute, like setulae. Postocellar bristles absent. With both inner
and outer vertical bristles. Outer vertical, postvertical and postocellar
bristles all acuminate. Postocular bristles acuminate; normal (sparse). Genal
bristle present. Head higher than long. Male and female head width the same.
Frontofacial angle much greater than a right angle and rounded. Face undulating,
convex above, concave below; with distinct antennal grooves and carina; shorter
than frons; vertical; with dark spots in antennal furrows (medium sized,
circular, not reaching epistoma). Parafacial spot absent. Frons and parafacial
without small silvery markings. Fronto-orbital plate setulose. Frontal stripe
setulose. Eye round, about as high or slightly higher than long. Antenna
considerably longer than face. Scape, pedicel, and first flagellomere scape and
pedicel short, first flagellomere elongate. First flagellomere as long as face;
rounded apically. Arista longer than first flagellomere; bare or with hairs
distinctly shorter than greatest aristal width. Proboscis short, capitate.
Thorax. Inner scapular bristle present and
distinguishable from surrounding vestiture; dark. Outer scapular bristle
present and distinguishable from surrounding vestiture; dark. Postpronotal
bristle absent. Presutural dorsocentral bristle absent. Presutural supra-alar
bristle absent. Postsutural supra-alar bristle present. Acrostichal bristle
present. Postsutural dorsocentral bristle absent. Intra-alar bristle present,
well developed, similar to postalar bristle. Intrapostalar bristles absent. Number
of scutellar bristles one pair. The single pair of scutellar bristles apical.
Anterior notopleural bristle present. Posterior notopleural bristle(s)
acuminate. Number of outstanding anepisternal bristles one. Katepisternal
bristles absent. Anepisternal bristles dark, brown to black. Long, erect
setulae on laterotergite absent. Scutal setulae acuminate and pale. Scutellum
densely setulose. Setulae on scutellum short, decumbent; unicolorous,
acuminate. Transverse suture with the lateral branches wide apart. Complete
sclerotized postcoxal metathoracic bridge present. Scutum black; without a
large dark central stripe which broadens basally. Postpronotal lobe entirely
pale whitish or yellowish; concolorous with lateral postsutural stripe.
Posterior half of notopleuron pale whitish or yellowish. Scutum dorsad of
notopleuron of the ground color, not whitish or yellowish. Dark lyre-like
pattern on scutum absent. Discrete shiny black spots on scutum absent. Median
longitudinal black stripe on scutum absent. Number of pale whitish to yellow
postsutural stripes two (lateral). Lateral postsutural stripes of scutum
extending to intra-alar bristles or beyond. Scutum without blackish
dorsocentral stripe. Area bordering scutoscutellar suture medially without dark
brown spot, light colored, or without dark brown spot, brown. Discrete pale
horizontal stripe along upper anepisternum absent or indistinct.
Distinct
pale vertical anepisternal stripe extending to postpronotal lobe.
Katepisternite with pale yellowish or whitish spot present and distinct.
Transverse suture without distinct stripe or spot. Katatergite with pale
yellowish or whitish spot present and distinct. Anatergite with pale yellowish
or whitish spot present and distinct. Subscutellum uniformly black, or
yellowish to orange-brown medially, with distinct dark spots laterally.
Mediotergite uniformly black. Scutum microtrichia in discrete pattern due to
density differences. Dorsum of scutellum flat or slightly convex, not swollen.
Scutellum normal; without a dark and pale pattern (at most a narrow dark basal
line); with no isolated dark spots; without black mark; without mark.
Legs. Femora slender. Fore femur with
regular bristles; without ventral spines; with 1 to 3 posterodorsal and 1
posteroventral rows of bristles only. Mid femur and hind femur without
spine-like bristles. Middle leg of male without feathering. Femora all entirely
of one color; dark mark on fore femur 0% of length of femur; dark mark on
middle femur 0% of length of femur; dark mark on hind femur 0% of length of
femur.
Wings. Wing partly bare. Cell bc
microtrichia absent. Cell c microtrichia present in apical area. Cell dm
entirely microtrichose. Dense microtrichia at end of vein A1+CuA2 in male
present. Dominant wing pattern cross-banded. Crossbanded wing patterns Rhagoletis-like.
Wing pattern mostly yellowish, or mostly brownish. Dark longitudinal streaks
through basal cells absent. Costal band complete from wing base to beyond R4+5.
Apex of costal band not distinctly expanded. Costal band all one color.
Crossvein r-m covered by a major crossband. Crossvein dm-cu covered by a major
crossband which reaches posterior margin of wing.
Crossveins
r-m and dm-cu both covered by a single crossband. Cell r2+3 apical
to r-m entirely infuscated. Anal band present, reaching nearly to wing margin
along cell cup extension (joining basal crossband posteriorly). Cell r1 and
r2+3 without darker spots within the pattern. Intercalary band absent. Marginal
hyaline area in cell r1 absent or indistinct. Ratio of width of apical band in
cell r4+5 to length of r-m 0.5–0.7. Anterior apical crossband contiguous with
costa over entire length, without marginal hyaline band or spots apically in
cells r1 and r2+3. Anterior apical band or costal band not extended to vein M. Posterior
apical crossband present; fused to anterior apical band. Costal and
discal bands joined on vein R4+5. Discal band transverse, or oblique in
anterobasal-posteroapical direction, or absent. Discal and subapical crossbands
joined along anterior wing margin or along vein R4+5, or joined along vein M (a
single band), or joined along posterior wing margin. Discal and subapical bands
connected along vein R4+5. Subapical and anterior apical crossbands joined.
Outstanding costal spine(s) at subcostal break absent. Ratio of length of
costal section 3 to costal section 4 0.75–0.8. Ratio of pterostigmal length to
width 5. Vein R1 dorsal setation without bare section opposite end of vein Sc.
Vein Rs dorsal setation non-setulose. Vein R2+3 generally straight.
Anteriorly-directed accessory vein emerging from R2+3 absent. Vein R4+5 dorsal
setation dense over at least proximal section; ventral setation present. Distance
between crossvein r-m and costa shorter than r-m. R-m crossvein on
cell dm at or near distal third of cell dm. Cell bm broad,
parallel-sided; ratio of length to width 2; ratio of width to cell cup
width 2. Vein M distally curved anterad, or straight. Cell dm widens apically
gradually from base. Posterodistal corner of cell dm distinctly acute, or
approximately a right angle. Cell cup extension or lobe present, vein CuA2
abruptly bent; longer than vein A1+CuA2; with parallel margins.
Abdomen. Abdomen ovate or parallel sided. Abdominal
tergites separate. Abdomen in lateral view arched, dome-like, rather rigid.
Abdominal tergite 1 broader at apex than at base; without a prominent hump
laterally. Pecten of dark bristles on tergite 3 of male present. Tergal glands
on tergite 5 present. Abdominal tergite 5 normal. 6th tergite of female
normally concealed; shorter than 5th. Abdominal setulae acuminate and pale.
Abdominal microtomentum uniform, or absent. Abdominal sternite 5 of male less
than 2x wider than long, not longer than wide. Posterior margin of sternite 5
of male with deep V-shaped posterior concavity. Abdominal tergites 3–5
predominantly yellow to orange brown. Abdominal tergites with medial dark
stripe, usually on T3-T5 (T3-T5 or T4-T5), or with medial dark stripe on T5 only
(variable); with broadly contiguous dark areas on lateral margins of T3-T5, or
without isolated dark areas on lateral margins of T3-T5 (variable).
Male terminalia. Epandrium
in posterior view with long outer surstyli, which are more than half as long as
epandrium; lateral view with outer surstyli distinctly narrower than epandrium,
clearly differentiated. Posterior lobe of surstylus short or absent. Female terminalia. Syntergosternite 7
straight; shorter than preabdomen; base without a laterally projecting flap;
flattened. Ratio of syntergosternite 7 to abdominal tergite 5 1.2. Dorsobasal
scales of eversible membrane about as large as other scales. Aculeus tip blunt,
or gradually tapering, needle-like, with flat cross-section; fused to main part
of aculeus, not movable; 0% serrated; not serrate. Two sclerotized
spermathecae. Spermathecae tight-set coils. Miscellaneous.
Male attractant: methyl eugenol (Bambang Purnomo)
Tidak ada komentar:
Posting Komentar