Pests
Cotton Bollworm
Gossypium hirsutum L.
The cotton bollworm (Helicoverpa armigera) is a dangerous polyphagous pest whose larvae damage buds, flowers, and immature bolls of cotton, providing entry points for secondary infections.
In the reference 5 varieties crop Upland cotton, where this is mentioned in the description.
Larvae of the first generations feed primarily on young buds in the upper part of the plant. In later developmental stages, they switch to feeding on flowers, eating out ovaries and stamens, and also damage immature bolls. Damage to the bolls creates favorable conditions for secondary infection of cotton by fungal and bacterial diseases, which leads to significant crop losses.
Traditional resistance genes to this pest have not been identified in cotton breeding. Modern protection is based on the development of Bt-cotton incorporating the δ-endotoxin gene from the bacterium Bacillus thuringiensis, as well as the use of RNA interference technologies to increase plant resistance to pest infestation.
General information about the subject — on the page Cutworms and armyworms.
Varieties of Upland cotton mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
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