Beet Armyworm


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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

References in periodicals archive ?
Laboratory evaluations of synthetic and natural insecticides on beet armyworm (Lepidoptera: Noctuidae) damage and survival on lettuce.
Reproduction of the beet armyworm, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae), and influence of delayed mating.
Mean ([+ or -] SE) live weights of beet armyworm larvae that survived from feeding on cotton host plant tissue at 5 d post egg hatch.
Laboratory and field performance of cotton containing Cry1Ac, Cry1F, and both Cry1Ac and Cry1F (WideStrike) against beet armyworm and fall armyworm (Lepidoptera: Noctuidae).
Its products include two biofungicides -- Aspire for post-harvest rot disease and AQ10 for powdery mildew -- as well as its Bt bioinsecticides -- CRYMAX, to control caterpillars on fruits and vegetables, Condor, to control caterpillars on cotton and other row crops, and Lepinox to combat fall and beet armyworm in sweet corn, turf and other row crops.
Previous studies have shown that feeding on TSA by beet armyworm and southern armyworm induces secondary plant defenses that negatively affect the performance of other insect herbivores (Hix et al.
Now we've found that beet armyworm moths display decided preferences when it comes to laying eggs.
exigua-baited traps only attracted one beet armyworm moth, the S.
They also tested promising strains against the beet armyworm, black cutworm, cabbage looper, and imported cabbageworm.
The beet armyworm, Spodoptera exigua (Hubner) is a secondary, but serious migratory pest of various vegetable and certain row crops in the southern part of the United States of America.
This research builds on previous findings that beet armyworm caterpillars elicit a chemical SOS response in plants.
We've demonstrated the effectiveness of Spod-X in controlling the beet armyworm and we are able to produce insecticidal virus products at a competitive cost," said Mr.