Pyralis pictalis

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Painted meal moth
Pyralis pictalis-Curtis.png
Illustration of adult
from John Curtis' British Entomology (Volume 6)
Pyralis pictalis (Curtis, 1834).jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Pyralidae
Genus: Pyralis
Species:
P. pictalis
Binomial name
Pyralis pictalis
(Curtis, 1834)
Synonyms

Several, see text

Pyralis pictalis, the painted meal moth or poplar pyralis, is a snout moth (family Pyralidae). It is closely related to the family's type species the meal moth (P. farinalis) and consequently belongs to the tribe Pyralini of the snout moth subfamily Pyralinae. Its native range is tropical Asia to East Asia and to Wallacea and adjacent regions, but it has been quite widely (though involuntarily) distributed by humans. The term "Poplar" in its common name does not refer to the trees, but to Poplar, London, where the type specimen from such an introduction was caught. It was called scarce meal moth in the original description, which is only correct for the fringes of its range however. [1]

While the caterpillars of this moth are most notable as a stored-food pest, they may themselves be useful for biological pest control as under certain conditions they will eat other insects' eggs.

Distribution

It is not known precisely where this moth originated, but it seems to have been the general region of Southeast Asia. Presumably, the painted meal moth natively ranged from southern India and Sri Lanka northeastwards to Japan and southeastwards at least to Sumatra, Java and at least parts of Borneo; perhaps its natural range extended as far as the Philippines in the east, and to New Guinea or even Fiji in the southeast.

But the latter population, widely isolated as it seems, may just as well be a colonial era introduction, as may be the case for the records from Australia (beyond Wallacea, as seen from its core range) and northwest British India (beyond the Himalayas). In Polynesia P. pictalis was recorded beyond Fiji from Kiribati and from Hiva Oa in the Marquesas Islands, presumably fairly recent introductions. In Africa it appears to be absent from the east, but has been found in Belgian Congo and West Africa, as well as in South Africa. Finally there are of course the records from England and other European localities; in brief, outside its contiguous range the moth mainly occurs along the historical East Indiaman trade route. However, this moth tends to occur ephemerally outside its presumed core region; in temperate and even in subtropical Europe for example the species does not seem to have established a self-sustaining population and may in fact for all practical purposes be considered absent. [2]

Description and ecology

The adults resemble the meal moth (P. farinalis) but are smaller, with a wingspan of 15–34 mm. Furthermore, the base of the forewings has a lead-grey hue, and the light-bordered band in the forewing centre is narrower. [3]

Larvae have also been recorded to eat the eggs of the bed bug Cimex hemipterus , a species known as major vector for disease (eventually determined to be hepatitis B). This must be considered when eradicating P. pictalis in a pest situation, particularly since C. hemipterus are quick to evolve insecticide resistance. Biological pest control by this or another species may be feasible if the stored-food pest problem is accounted for. Considering the original data, insectivory of P. pictalis caterpillars may be a seasonal phenomenon, meaning that they would need to be deployed in numbers for a few weeks at the start of the wettest time of year, the resultant moth population immediately being suppressed or sterilized. [4]

Synonyms

Due to the species being so widely introduced outside its native range and occurring in new locales as global traffic increased, introduced populations were times and again believed to be new species. To Francis Walker, one of the most prolific entomologists of the mid-late 19th century, this happened no less than three times. As a consequence, the painted meal moth has a number of now-invalid junior synonyms: [5]

Footnotes

  1. Curtis (1834), Clarke (1986)
  2. Clarke (1986), ABRS (2010), FE (2011)
  3. Curtis (1834), Wattal & Kalra (1960), Clarke (1986)
  4. Wattal & Kalra (1960)
  5. Clarke (1986)

Related Research Articles

<span class="mw-page-title-main">Pyralidae</span> Family of moths

The Pyralidae, commonly called pyralid moths, snout moths or grass moths, are a family of Lepidoptera in the ditrysian superfamily Pyraloidea. In many classifications, the grass moths (Crambidae) are included in the Pyralidae as a subfamily, making the combined group one of the largest families in the Lepidoptera. The latest review by Eugene G. Munroe and Maria Alma Solis retain the Crambidae as a full family of Pyraloidea.

<span class="mw-page-title-main">Almond moth</span> Species of moth

The almond moth or tropical warehouse moth is a small, stored-product pest. Almond moths infest flour, bran, oats, and other grains, as well as dried fruits. It belongs to the family of snout moths (Pyralidae), and more specifically to the tribe Phycitini of the huge snout moth subfamily Phycitinae. This species may be confused with the related Indian mealmoth or the Mediterranean flour moth, which are also common pantry pests in the same subfamily.

The Tineodidae or false plume moths are a family of moths with in some cases unusually modified wings: Like in some related moths, the wings of several Tineodidae are decomposed into several rigid spines. This is a small family, with about a global total of 20 species described to date; some undescribed species are known or suspected to exist however. They seem to be of Australian origin, where they are most diverse, but range through the Wallacea to Southeast and South Asia, and into the Pacific to the Marquesas Islands.

<span class="mw-page-title-main">Pyralinae</span> Subfamily of moths

The Pyralinae are the typical subfamily of snout moths and occur essentially worldwide, in some cases aided by involuntary introduction by humans. They are rather rare in the Americas however, and their diversity in the Australian region is also limited. Altogether, this subfamily includes about 900 described species, but new ones continue to be discovered. Like many of their relatives in the superfamily Pyraloidea, the caterpillar larvae of many Pyralinae – and in some cases even the adults – have evolved the ability to use unusual foods for nutrition; a few of these can become harmful to humans as pests of stored goods.

<span class="mw-page-title-main">Pyralini</span> Tribe of moths

The Pyralini are a tribe of snout moths described by Pierre André Latreille in 1809. They belong to the subfamily Pyralinae, which contains the "typical" snout moths of the Old World and some other regions. The genus list presented here is provisional.

Ephysteris is a genus of the twirler moth family (Gelechiidae). Among these, it is assigned to tribe Gnorimoschemini of the subfamily Gelechiinae. Even though it is a rather diverse and widespread group, most of these small and inconspicuous moths were overlooked by scientists until the early 20th century. Almost 90 species are known today but new ones are still being discovered.

<i>Pyralis farinalis</i> Species of moth

Pyralis farinalis, the meal moth, is a cosmopolitan moth of the family Pyralidae. Its larvae (caterpillars) are pests of certain stored foods, namely milled plant products.

<i>Crocidosema plebejana</i> Species of moth

Crocidosema plebejana, the cotton tipworm, is a tortrix moth, belonging to tribe Eucosmini of subfamily Olethreutinae. It is found today all over the subtropical and tropical regions of the world and even occurs on many oceanic islands – in Polynesia and Saint Helena for example – but has probably been accidentally introduced to much of its current range by humans. In addition, it is also found in some cooler regions, e.g. in Europe except in the east and north; this is probably also not natural, as it was, for example, not recorded in the British Isles before 1900.

<i>Aglossa cuprina</i> Species of moth

Aglossa cuprina, the grease moth, is a snout moth, family Pyralidae, described by Philipp Christoph Zeller in 1872. The grease moth is closely related to the genus Pyralis, and as a result, is usually associated with the meal moth, Pyralis farinalis.

The term flour moth refers to certain small moths of the family Pyralidae, whose caterpillars are a pest of flour:

<i>Diaphania indica</i> Species of moth

Diaphania indica, the cucumber moth or cotton caterpillar, is a widespread but mainly Old World moth species. It belongs to the grass moth family, and therein to the large subfamily Spilomelinae. This moth occurs in many tropical and subtropical regions outside the Americas, though it is native to southern Asia; it is occasionally a significant pest of cucurbits and some other plants.

<i>Pyralis manihotalis</i> Species of moth

Pyralis manihotalis is a moth of the family Pyralidae described by Achille Guenée in 1854.

<span class="mw-page-title-main">Phycitinae</span> Subfamily of moths

The Phycitinae are a subfamily of snout moths. Even though the Pyralidae subfamilies are all quite diverse, Phycitinae stand out even by standards of their family: with over 600 genera considered valid and more than 4000 species placed here at present, they unite up more than three-quarters of living snout moth diversity. Together with the closely related Epipaschiinae, they are apparently the most advanced lineage of snout moths.

<i>Cryptoblabes</i> Genus of moths

Cryptoblabes is a genus of small moths belonging to the snout moth family (Pyralidae). They are the type genus of the Cryptoblabini tribe of the huge snout moth subfamily Phycitinae. At least one representative of this genus nowadays occurs in many parts of the world, though this is the result of accidental introductions by humans; most species of Cryptoblabes are fairly restricted in range.

Zamagiria is a genus of small moths belonging to the snout moth family (Pyralidae). They are part of the huge snout moth subfamily Phycitinae, but their exact relationships are obscure, and they are currently not assigned to a particular tribe of Phycitinae.

<i>Eldana</i> Genus of moths

Eldana is a genus of moths of the family Pyralidae containing only one species, the African sugar-cane borer, which is commonly found in Equatorial Guinea, Ghana, Mozambique, Sierra Leone and South Africa. Adults have pale brown forewings with two small spots in the centre and light brown hindwings, and they have a wingspan of 35mm. This species is particularly relevant to humans because the larvae are a pest of the Saccharum species as well as several grain crops such as sorghum and maize. Other recorded host plants are cassava, rice and Cyperus species. When attacking these crops, E. saccharina bores into the stems of their host plant, causing severe damage to the crop. This behavior is the origin of the E. saccharrina's common name, the African sugar-cane borer. The African sugar-cane borer is a resilient pest, as it can survive crop burnings. Other methods such as intercropping and parasitic wasps have been employed to prevent further damage to crops.

<i>Amyelois</i> Genus of moths

Amyelois is a monotypic snout moth genus described by Hans Georg Amsel in 1956. Its single species, Amyelois transitella, the navel orangeworm, described by Francis Walker in 1863, is endemic to the tropical Western Hemisphere, including the southern United States. Its abundance in California increased greatly during the first half of the 20th century.

<i>Autosticha</i> Genus of moths

Autosticha is a genus of gelechioid moths. It belongs to the subfamily Autostichinae, which is either placed in the concealer moth family (Oecophoridae), or in an expanded Autostichidae. It is the type genus of its subfamily. Originally, this genus was named Automola, but this name properly refers to a fly genus in family Richardiidae.

<i>Pyralis</i> Genus of moths

Pyralis is a genus of snout moths. It was described by Carl Linnaeus in 1758.

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