armyworm


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Related to armyworm: fall armyworm

armyworm,

larva of a moth, Pseudaletia unipuncta, found in North America E of the Rocky Mts. 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. Armyworms 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 ?
Mean ([+ or -] SE) live weights of beet armyworm larvae that survived from feeding on cotton host plant tissue at 5 d post egg hatch.
Plant-incorporated Bacillus thuringiensis resistance for control of fall armyworm and corn earworm (Lepidoptera: Noctuidae) in corn.
Now research has shown that cowpeas (Vigna unguiculata) detect and respond to degradation products when their tissues are chewed on by fall armyworms.
McNeil of Universite Laval in Sainte-Foy, Quebec, wanted to know if the same chemical, called juvenile hormone, that controls migration and ovary development in many insects might be responsible for the armyworm moth's release of pheromone and the behavior patterns, termed "calling," associated with this release.
Efficacy of various soybean seed treatments against fall armyworm larvae at (A) 2, (B) 3, and (C) 4 days after infestation (DAI) from leaves excised from plants at the V3 (vegetative) growth stage.
There is a lot of anecdotal evidence about what attracts the beet armyworm to particular plants and fields.
Several companies produce lures to attract fall armyworm, however, these lures also attract large numbers of nontarget Lepidoptera which complicates species identification and counting of individuals (Adams et al.
In laboratory bioassays, BB-1200 consistently exhibited virulence equal to or greater than the GHA strain against all lepidopteran pests tested, including fall armyworm, beet armyworm, black cutworm, corn borer, and cabbage looper--pests that are not highly susceptible to the GHA strain, according to ARS ecologist Stephen P.
Genuity VT Triple PRO RIB Complete, a blend of 90 percent insect-protected and 10 percent refuge seed, contains herbicide tolerance, a single mode of action for corn rootworm control and dual modes of action for above-ground insect protection - including corn earworm, fall armyworm and European and Southwestern corn borer.
This research builds on previous findings that beet armyworm caterpillars elicit a chemical SOS response in plants.