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- African_armyworm abstract "The African armyworm (AAW), Spodoptera exempta (Walker) (Lepidoptera: Noctuidae), also called okalombo or Kommandowurm or nutgrass armyworm, is an African moth. It is a very deleterious pest, capable of destroying entire crops in a matter of weeks. The larvae feed on all types of grasses, early stages of cereal crops (e.g., corn, rice, wheat, millet, sorghum), sugar cane, and occasionally on coconut. The armyworm gets its name from its habit of "marching" in large numbers from grasslands into crops. AAWs tend to occur at very high densities during the rainy season, especially after periods of prolonged drought. During the long dry season in eastern Africa AAW population densities are very low. Because outbreaks are never observed during the dry season, it is called the "off-season" by those that monitor AAWs.Spodoptera exempta moths live about 10 days. The female can lay a maximum of about 1000 eggs in her lifetime. The ivory-coloured eggs of the African armyworm are laid in clusters on leaves. Eggs hatch in 2–5 days. Six larval (caterpillar) instars are completed in 2–3 weeks. Caterpillars occur in two morphologically distinct forms: a "gregarious" form, which is black with yellow stripes, and a solitary form, which is green or brown. The morphological form is determined by density — becoming "gregarious" at higher densities. However, the AAWs do not exhibit the true gregarious behavior of locusts. It is the "gregarious" forms of AAW that cause outbreaks. Generally, AAWs are not noticed by farmers until the caterpillars are 10 days old and change from green to black. In the last instar, larvae burrow 2–3 cm into the ground to pupate. Adults emerge in 7 to 10 days. The moths migrate over tens, and probably over hundreds, of kilometers between their emergence sites and their oviposition sites. The observation that AAW outbreaks can suddenly occur in areas that were free of the pests for several months has led to the hypothesis that the moths migrate hundreds of kilometres.The species also occurs in Yemen, some Pacific islands, and parts of Australia.".
- African_armyworm class Insect.
- African_armyworm family Noctuidae.
- African_armyworm genus Spodoptera.
- African_armyworm kingdom Animal.
- African_armyworm order Lepidoptera.
- African_armyworm phylum Arthropod.
- African_armyworm synonym "*Agrotis exempta (Walker, 1856)".
- African_armyworm synonym "*Laphygma exempta".
- African_armyworm synonym "*Prodenia bipars (Walker, 1857)".
- African_armyworm synonym "*Prodenia ingloria (Walker, 1858)".
- African_armyworm wikiPageID "4623698".
- African_armyworm wikiPageRevisionID "586602444".
- African_armyworm binomial "Spodoptera exempta".
- African_armyworm classis "Insecta".
- African_armyworm familia Noctuidae.
- African_armyworm genus "Spodoptera".
- African_armyworm hasPhotoCollection African_armyworm.
- African_armyworm name "African armyworm".
- African_armyworm ordo Lepidoptera.
- African_armyworm phylum "Arthropoda".
- African_armyworm regnum "Animalia".
- African_armyworm species "S. exempta".
- African_armyworm synonyms "*Agrotis exempta (Walker, 1856) *Prodenia bipars (Walker, 1857) *Prodenia ingloria (Walker, 1858) *Laphygma exempta".
- African_armyworm subject Category:Agricultural_pest_insects.
- African_armyworm subject Category:Fauna_of_Cape_Verde.
- African_armyworm subject Category:Fauna_of_Eritrea.
- African_armyworm subject Category:Fauna_of_Kenya.
- African_armyworm subject Category:Fauna_of_Mali.
- African_armyworm subject Category:Fauna_of_Mauritania.
- African_armyworm subject Category:Fauna_of_Niger.
- African_armyworm subject Category:Fauna_of_Somalia.
- African_armyworm subject Category:Fauna_of_Yemen.
- African_armyworm subject Category:Fauna_of_Zimbabwe.
- African_armyworm subject Category:Fauna_of_the_Gambia.
- African_armyworm subject Category:Insects_of_Ghana.
- African_armyworm subject Category:Insects_of_Guinea.
- African_armyworm subject Category:Insects_of_Nigeria.
- African_armyworm subject Category:Insects_of_Senegal.
- African_armyworm subject Category:Insects_of_Uganda.
- African_armyworm subject Category:Moths_of_Japan.
- African_armyworm subject Category:Moths_of_Madagascar.
- African_armyworm subject Category:Moths_of_New_Zealand.
- African_armyworm subject Category:Moths_of_Sierra_Leone.
- African_armyworm subject Category:Spodoptera.
- African_armyworm type AgriculturalPestInsects.
- African_armyworm type Animal100015388.
- African_armyworm type Arthropod101767661.
- African_armyworm type Insect102159955.
- African_armyworm type Invertebrate101905661.
- African_armyworm type LivingThing100004258.
- African_armyworm type Object100002684.
- African_armyworm type Organism100004475.
- African_armyworm type PhysicalEntity100001930.
- African_armyworm type Whole100003553.
- African_armyworm type Animal.
- African_armyworm type Eukaryote.
- African_armyworm type Insect.
- African_armyworm type Species.
- African_armyworm type Animal.
- African_armyworm type Insect.
- African_armyworm type Organism.
- African_armyworm comment "The African armyworm (AAW), Spodoptera exempta (Walker) (Lepidoptera: Noctuidae), also called okalombo or Kommandowurm or nutgrass armyworm, is an African moth. It is a very deleterious pest, capable of destroying entire crops in a matter of weeks. The larvae feed on all types of grasses, early stages of cereal crops (e.g., corn, rice, wheat, millet, sorghum), sugar cane, and occasionally on coconut.".
- African_armyworm label "African armyworm".
- African_armyworm label "Spodoptera exempta".
- African_armyworm label "Spodoptera exempta".
- African_armyworm sameAs Spodoptera_exempta.
- African_armyworm sameAs Spodoptera_exempta.
- African_armyworm sameAs m.0cd57t.
- African_armyworm sameAs Q310010.
- African_armyworm sameAs Q310010.
- African_armyworm sameAs African_armyworm.
- African_armyworm wasDerivedFrom African_armyworm?oldid=586602444.
- African_armyworm isPrimaryTopicOf African_armyworm.
- African_armyworm name "African armyworm".