Beet Armyworm

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Related to Spodoptera exigua: Spodoptera frugiperda, Trichoplusia ni

Beet Armyworm

 

(Spodoptera, or Laphygma, exiqua), an insect of the family Noctuidae, a serious pest of cotton, alfalfa, tomatoes, sugar beets, and many other agricultural crops. The wingspread is 26–34 mm; the fore wings are grayish brown, and the hind wings white. The beet armyworm is found in many areas of Africa, South Asia, and North America; in the USSR it is encountered in the Lower Volga Region, Transcaucasia, and Middle Asia (where there are from two to six generations per year). Development has no diapause. The moths appear in early spring and lay clumps of several dozen eggs on leaves; some species lay hundreds of eggs. The caterpillars hatch in four to 11 days.

The beet armyworm feeds on leaves, stripping them to the veins or gnawing large irregular holes. When they appear in enormous numbers, the caterpillars may penetrate stems and branches and damage the flowers, buds, and pods of cotton plants, as well as the fruits of tomatoes and the root crop of sugar beets. Not uncommonly, they destroy sprouts or sharply reduce the yield and lower the quality of crops. The beet armyworm pupates in the upper layers of the soil. Countermeasures include the application of modern agricultural techniques and the treatment of plantings with insecticides and biological preparations.

REFERENCE

Bogush, P. P. Malaia nazemnaia sovka v Turkmenistane i drugikh mestakh ee obitaniia. Ashkhabad, 1964.

P. P. BOGUSH

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Competition between wild-type and a marked recombinant baculovirus (Spodoptera exigua nucleopolyhedrovirus) with enhanced speed of action in insect larvae.
Exposure to fenitrothion causes malfunctions of Spodoptera exigua Hubner (Lep.: Noctuidae) eggs.
The adults of beet armyworm, Spodoptera exigua from the methoxyfenozide treatment did not show reduced fecundity, but fertility as measured by the percentage of eggs hatched (fertility) was significantly reduced compared with untreated control insects [29].
Trumble, "Feeding preferences of Spodoptera exigua in response to form and concentration of selenium," Archives of Insect Biochemistry and Physiology, vol.
1991.--Competitive interactions between entomopathogenic nematodes and Beauveria bassiana (Deuteromycotina: Hypomycetes) in soilborne larvae of Spodoptera exigua (Lepidoptera: Noctuidae).
Isolation, identification, and determination of virulence of a nuclear polyhedrosis virus from the beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae).
Feeding and life history of Spodoptera exigua (Lepidoptera: Noctuidae) on different host plants.
Efecto de los residuos de metaxifenocida sobre el gusano soldado, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae).
Water potential, temperature, and clay-coating of Beauveria bassiana conidia: Effect on Spodoptera exigua pupal mortality in two soil types.
This applies to the following agents: iodosulfuron methyl-sodium, indoxacarb, S-metolachlor, Spodoptera exigua nuclear polyhedrosis virus, tepraloxydim and dimethenamide-P.
One recruit is a natural insect pathogen known as a Spodoptera exigua nuclear polyhedrosis virus (SeNPV).
The tomato fruitworm Helicoverpa (Heliothis) zea (Noctuidae) and the fall armyworm Spodoptera exigua (Noctuidae) are polyphagous herbivores of foliage of field and vegetable crops (Metcalf et al.