Cotton Bollworm

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Cotton Bollworm


(also corn earworm; Heliothis armigera), a moth of the family Noctuidae. The anterior wings are grayish yellow, and the posterior wings are lighter. The wingspan is 30–40 mm. The cotton bollworm is distributed in cotton-growing countries. In the USSR it is found in the southern European portion and in the Caucasus. The pupae winter in the soil, and the moths hatch in spring, when the temperature of the upper layer of soil is 17° to 20°C. They lay their eggs, about 500 at a time, on the upper parts of the plants.

The caterpillars damage more than 120 species of cultivated and wild plants. The plants most often damaged are cotton, corn, chick-pea, tomato, kenaf, tobacco, and soy. When feeding on cotton, the insects first skeletonize the leaves and then damage the buds, flowers, and ovaries, causing them to fall; subsequently they eat the seeds out of the bolls. The caterpillars also feed on corn in the ears and eat the seeds of tobacco and tomatoes.

Control measures include autumn plowing and the destruction of flowering weeds in the spring. Infected corn, tobacco, chickpea, and tomato crops are treated with insecticides in May (treatment is discontinued 25–30 days before harvest), while cotton is treated during budding. Other control measures include early cutting of corn for silage, the destruction of eggs and caterpillars during chopping of cotton, and the removal of post-harvest plant wastes from fields.


Pospelov, S. M., M. V. Arsen’eva, and G. S. Gruzdev. Zashchita rastenii. Leningrad, 1973.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
(2000) reported that among 17 Bt cultivars, NUCOTN33B and 451BR differed in larval survival in no-choice laboratory leaf feeding assays, with 451BR supporting significantly higher cotton bollworm larval growth.
On the spatio- temporal expression of the contents of Bt insecticidal protein and the resistance of Bt transgenic cotton to cotton bollworm. Acta Phytophyl.
The test distinguishes cotton bollworms from their cousins, the tobacco budworm and groundcherry fruitworm.
De Moraes tested the tobacco plant's response to two closely related insects: the tobacco budworm (Heliothis virescens), a common pest of the plant, and the corn earworm, also called the cotton bollworm (Helicoverpa zea), which normally doesn't touch the stuff.
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Tobacco budworms, Heliothis virescens, and their cotton bollworm cousins, Helicoverpa zea, cost southeastern cotton farmers several hundred million dollars a year in damage and chemical controls.
One version of the toxin protects against a range of caterpillars, including the European corn borer, the cotton bollworm and the beet armyworm.
Released at the peak of pregnancy, female Trichogramma seek the perfect place to lay their eggs: directly into the eggs of such agricultural pests as the cotton bollworm and the European corn borer.
Characters of some cotton cultivars associated with cotton bollworm Helicoverpa armigera (Hubner) resistance.
A quarter-inch-long wasp that can't fly could save the spring cotton crop from the ravages of the cotton bollworm, Helicoverpa zea, if future ARS field trials "fly."
The best characterized of these newly discovered polydnaviruses is one associated with Campoletis sonorensis, a less than half-inch long wasp that attacks two larvae -- the tobacco budworm and another that's variously known as the cotton bollworm, tomato fruitworm or corn earworm.