armyworm


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Related to armyworm: fall armyworm

armyworm,

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.

Armyworm

 

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.

armyworm

[′är·mē‚wərm]
(invertebrate zoology)
Any of the larvae of certain species of noctuid moths composing the family Phalaenidae; economically important pests of corn and other grasses.
References in periodicals archive ?
By March, the fall armyworm had been reported in 20 countries in Southern Africa, East Africa and parts of West Africa including Benin, Democratic Republic of Congo, Ghana, Nigeria, Togo, and SEuo Tome and PrE[degrees]ncipe.
The fall armyworm arrival is an additional challenge for South Sudan which currently faces an unprecedented food crisis.
2014) they concluded that armyworm abundance was significant and negatively correlated with maximum temperature on the other hand relative humidity was positively correlated with armyworm abundance.
In Bahawalnagar, one hot spot of white fly, Thrips (2), and armyworm (1).
It indicates that this parasitoid is an important natural enemy of armyworm pests, and additional studies will elucidate the biological parameters of this parasitoid and the potential for its augmentative release in crop fields.
Laboratory and field performance of cotton containing Cry1Ac, Cry1F, and both Cry1Ac and Cry1F (Widestrike) against beet armyworm and fall armyworm larvae (Lepidoptera: Noctuidae).
The results given in table-I showed that all the different chemicals have no impact on germination m-2 of mung crop during both the years 2007 and 2008 because all the chemicals were applied after germination to control Armyworm.
Geographical distributions and parasitization levels for parasitoids of the fall armyworm, Spodoptera frugiperda.
In studies at the Agricultural Research Service's National Center for Agricultural Utilization Research (NCAUR) in Peoria, Illinois, scientists are spiking laboratory diets fed to corn earworm and fall armyworm with saponins from soybeans, switchgrass, yerba mate, and other sources to determine what effects the compounds have on the caterpillar pests' growth and survival.