Cotton Bollworm


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Related to Cotton Bollworm: pink bollworm

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.

REFERENCE

Pospelov, S. M., M. V. Arsen’eva, and G. S. Gruzdev. Zashchita rastenii. Leningrad, 1973.
References in periodicals archive ?
Morphometric differences between pyrethroid resistant and susceptible populations of cotton bollworm, Helicoverpa armigera.
Comparative damage potential and feeding dynamics of the European corn borer (Lepidoptera: Pyralidae) and cotton bollworm (Lepidoptera: Noctuidae) on cotton bolls.
Current Bt cotton cultivars essentially control attack from tobacco budworm, but are less resistant to cotton bollworm larvae (Benedict et al.
Pyrethroid resistance mechanisms in the cotton bollworm Helicoverpa armigera (Lepidoptera: Noctuidae) from West Africa.
For baculovirus production, the researchers have established eight insect cell lines from embryos and ovaries from members of the Helicoverpa and Heliothis species (for example, cotton bollworm and corn earworm) that damage cotton, corn, tobacco, tomato, and many more crops.
On the spatio- temporal expression of the contents of Bt insecticidal protein and the resistance of Bt transgenic cotton to cotton bollworm.
Resistance to the Cry1Ac endotoxin of Bacillus thuringiensis in the cotton bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae).
Gemstar(R) utilizes a naturally occurring nuclear polyhedrosis virus (NPV) isolated from the cotton bollworm and enclosed in proteins.
Organophosphorus insecticides synergize pyrethroids in the resistant strain of cotton bollworm, Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) from West Africa.
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.
Lepidoptera: Noctuidae) commonly known as cotton bollworm or American bollworm, is distributed worldwide and considered a serious pest of many economic crops.
In just 2-1/2 hours, it could detect remains of cotton bollworm larvae in the soldier bug's gut.