Agriculture Reference
In-Depth Information
EXAMPLES:
Cecidophyinae -
Cecidophyopsis
ribis
(black currant gall mite),
Colomerus vitis
(vine leaf blister mite); Eriophyinae -
Acalitus
essigi
(blackberry mite),
Aceria lycopersici
(tomato erineum mite),
Eriophyes pyri
(pear
leaf blister mite); Phyllocoptinae -
Abacarus
hystrix
(cereal rust mite),
A cuius
schlechtendali
(apple rust mite),
Phyllocoptes
gracilis
(raspberry leaf & bud mite).
Fig. 168
Prodorsal shield of eriophyid mites:
(a) family Phytoptidae; (b) family Eriophyidae.
Superfamily TARSONEMOIDEA
3. Family SCUTACARIDAE
Minute mites with an anterior dorsal plate
forming a roof-like shield (scutum) over the
gnathosoma; hindlegs of female elongated
and each bearing several whip-like setae. In-
cludes some highly specialized insect-parasitic
species.
EXAMPLE:
Acarapis woodi
(acarine disease
mite), a well-known parasite of honey bees.
4. Family TROMBICULIDAE
Small (up to I mm long), oval to broadly dumb-
bell-shaped, superficially spider-like mites with a
dorsal scutum. Adults and nymphs are free-
living but larvae are parasitic on warm-blooded
vertebrates, including farm animals and man.
EXAMPLE:
Neotrombicula autumnalis
(harvest
mite).
genital flap
A,
Fig. 169
A female gall mite - family Eriophyidae:
(a) feather claw.
2. Family ERIOPHYIDAE (gall mites)
(p. 255
et seq.)
Minute, fusiform, pyriform or vermiform mites
up to 0.2mm long; two pairs of legs, located
anteriorly; propodosoma forming a shield-like
structure (the prodorsal shield) which bears two
or no setae
(Fig. 168b)
and is often characteristi-
cally shaped or sculptured; hysterosoma elon-
gated and annulated, with numerous tergites and
sternites, the latter frequently occurring in
greater numbers
(Fig. 169)
(in the subfamily
Phyllocoptinae - hysterosoma often with rela-
tively few, very broad tergites); feather-claws
either simple or divided
(Fig. 169a).
Includes
free-living and gall-forming species, and gall-
inhabiting inquilines.
5. Family TARSONEMIDAE
(tarsonemid mites)
(p. 260
et seq.)
Small, often transparent, brownish to whitish,
barrel-shaped mites; chelicerae short and
needle-like; hindlegs of female reduced and
without claws
(Fig. 170);
hindlegs of male 3-
segmented, robust and often clasper-like, each
terminating in a stout claw and often bearing a
distinctive inwardly directed flange
(Fig. 171).
EXAMPLES:
Phytonemus pallidus
(cyclamen
mite);
Polyphagotarsonemus
latus
(broad
mite).
