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Mythimna separata (Walker, 1865)

Имаго (Mythimna separata)

Taxonomy

class Insecta → subclass Pterygota → infraclass Neoptera → superorder Holometabola → order Lepidoptera → superfamily Noctuoidea → family Noctuidae → subfamily Noctuinae → tribe Leucaniini → genus Mythimna → subgenus Pseudaletia → species Mythimna separata

Species name(s)

Mythimna (Pseudaletia) separata (Walker, 1865) = Leucania separata Walker, 1865 = Pseudaletia separata = Mythimna (Pseudaletia) separata. [3, 9]

urn:lsid:insecta.pro:taxonomy:14151

Expansion

This species marks on the maps: 1.

Russia regions

#31. Yuzhno-Yakutsky; #36. Sredne-Amursky; #37. Nizhne-Amursky; #38. Sakhalin; #39. Yuzhno-Kurilsky; #40. Primorsky.

Имаго (Mythimna separata)

Detailed information with references

Distribution

  • Regions of the Russian Federation: the Lower Amur, Primorye, Sakhalin, Mid-Amur, South Kuril, South Yakutia. [3].
  • - Japan, Korea, China (including Taiwan Island), South Mongolia, Indochina, Philippines, Indonesia, India, Nepal, Pakistan, Afghanistan, Middle Asia (Uzbekistan), Australia, New Zealand, Oceania. [204].

Imago Habitus and Differences from alike species

  • The forewings are grayish-yellow with a reddish tinge, dotted with small transverse strokes. Round and kidney-shaped spots are light, indistinct. Lower edge of the reniform spot with a white dot. A dark line runs obliquely from the top of the wings. [204].

General info about Imago

  • In the Russian Far East, it is a migratory species that often gives outbreaks of mass reproduction associated with the drift of the mass of butterflies by the movement of the atmospheric front in different directions. Meadows, wastelands, agrocenoses, grain crops. Dangerous pest of wild and cultivated cereals. [204].

Imago lifespan

  • -End V START VI, MIDDLE VII-End VIII, IX-END X [204].
  • The first generation of butterflies flies in VII-VIII, and the second, as a rule, in June of the next year, or from September-October of the current year until frost and then after wintering resumes in mid-May of the next year. In the first case, the pupa or caterpillar overwinters, in the second, the butterfly. [281].

General info about Larva

  • The body color of caterpillars is very variable. At the 1st age, the skin is colorless, translucent, from the 2nd age, a characteristic pattern of 6-8 dark longitudinal stripes appears. From the 3rd age, a white band is formed under the spiracles, on which red strokes appear from the 4th age. The overall color is very diverse: it can be brown or green shades with different intensity of color, width and severity of drawing elements. In the centers of mass reproduction, the caterpillars acquire a velvety black color, but retain white stripes on the sides. [281].

Larva food plants / other food objects

  • Caterpillars on cereals ( Agropyron, Dactylis, Echinochloa, Panicum, Setaria, Triticum, Zea, Poa) . [204].

Pupa

  • Light brown or dark yellow color. Body length 15-20 mm, chest width 5-6 mm [281].

Egg

  • Freshly laid, immature eggs have a spherical shape, slightly flattened from below, measuring 0.5-0.6 mm in diameter, milky white in color. As the eggs mature, they darken. In mature eggs, the outline of a curled embryo shines through the shell. Egg development lasts from 4-5 to 11-12 days from the moment of laying and depends on weather conditions. The oviposition has the form of a longitudinal string of 2-4 rows, from several tens to hundreds of eggs or more. [281].

Overwintering stage

  • Z. G. Onisimova (1949) points out that in the conditions of the Primorye Territory, the scooper can leave for the winter at any stage ,but as a rule, caterpillars and butterflies successfully overwinter in some years: individual individuals can annually overwinter in the imago stage. According to Kurentsov, eggs of the 3rd generation were left for wintering in laboratory conditions. In natural conditions, egg laying of the 3rd generation was not detected. [281].

Authors

Initial species uploading to the site: Peter Khramov.

Photos: Yuri Semejkin, Elena Volynets.

Text data: Peter Khramov, Yuri Semejkin.

The species characteristics formalization: Peter Khramov.

References

Comments

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