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larva, or caterpillar, of a moth, Pseudaletia unipuncta or Mythimna unipuncta, found in North America E of the Rocky Mts.; also known as the common, or true, armyworm. When numerous, armyworms move in hordes, traveling by night and devouring grasses, young grains, and some leguminous crops. The full-grown larva is about 2 in. (5 cm) long, dark gray with yellow and green stripes. There are usually two generations in a season, the larvae hatching from eggs in late spring and again in late summer. Pupation (see insectinsect,
invertebrate animal of the class Insecta of the phylum Arthropoda. Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.
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) is underground. The moth is grayish brown with a white spot on each fore wing. Armyworms are sometimes serious pests, especially in the second generation of the summer, which occurs when corn and wheat are maturing. Control methods include the use of poisoned bait and the digging of ditches and holes as traps. The armyworm can also be controlled by toxaphene insecticide, but this chemical is prohibited in most states. The caterpillars of several other moth species that form similar hordes and can be serious pests are also known as armyworms. The fall armyworm, Spodoptera frugiperda, of E and central North America and South America is also a serious pest in Africa, where it is typically more destructive than the African armyworm, Spodoptera exempta, in part because it can have six generations in a growing season. The armyworm species are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Lepidoptera, family Noctuidae.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the larva of the fungus gnat Sciara militaris of the order Diptera. The white body consists of 12 segments and reaches a length of 7 mm. The head is black. The armyworm lives in mushrooms, under the bark of rotting stumps and trees, and in decomposing vegetables and fallen leaves. When there is a shortage of food, the larvae sometimes form dense ribbon-shaped masses, reaching a length of 4.5 m and a width of 7.5 cm. The adult gnat is 3‣4.5 mm long. The males are black, and the females are black with yellowish stripes along their sides.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


(invertebrate zoology)
Any of the larvae of certain species of noctuid moths composing the family Phalaenidae; economically important pests of corn and other grasses.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
China-based XAG has announced it has introduced automous drones to improve pest control efficacy against disease caused by fall armyworms, the company said.
An armyworm, which usually comes out at night, is seen on sugar cane crop around dusk at a village of Menghai county in Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China, July 12, 2019.
'The African armyworm is mostly prevalent during years when we receive plenty of rainfall,' he noted.
CAIRO: Fall armyworms have been reported in Egypt's Aswan governorate, putting agricultural crops, particularly maize, at high risk.
'Fall armyworm poses a threat outside its range particularly in temperate regions because adult armyworm can travel several hundred kilometers in a single day by flying to and maintaining an elevation of several hundred meters at which height winds can transport them in a directional manner,' the memo read.
These include identifying natural enemies of the Fall Armyworm, enhancing natural biological controls and mechanical controls, such as crushing egg masses and employing the use of biopesticides.
" When Fall Armyworm arrived in Africa in 2016, FAO and its member counties in Asia followed the progression closely ndash and planned for its arrival on this continent.
The fall armyworm was first officially reported in Nigeria in West Africa in 2016, and rapidly spread across 44 countries in sub-Saharan Africa.
'And the committee has started working on how to continue fighting armyworm.
The beet armyworm, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae) is one of the most serious pests of agricultural crops including vegetables and flowers worldwide (Pogue, 2002; Saeed et al., 2010).
According to a story we have carried in our centre pages today, the spraying exercise, Code-named 'Kick Fall Armyworm Out', is currently going on in maize-growing districts of the Upper East, Upper West, Northern, Brong Ahafo, Ashanti, and Eastern regions.