Cotton seed bug

The cotton seed bug (Oxycarenus gossypii) is a member of the family Lygaeidae within the order Hemiptera. This pest is widely recognized for its negative impact on cotton cultivation, particularly in regions where the climate supports continuous development cycles of the insect.

The primary hosts of this bug are plants belonging to the Malvaceae family, with a distinct preference for cotton (Gossypium spp.). The adults and nymphs congregate in large numbers on the developing and opening cotton bolls, feeding directly on the seeds and the surrounding lint.

The life cycle begins with eggs deposited on the lint or within the cracks of the bolls. The nymphs progress through five instars before reaching the adult stage. The duration of the life cycle is highly dependent on ambient temperature and humidity, allowing for multiple generations per growing season.

Damage caused by this pest is twofold: direct feeding on the seeds reduces the oil content and germination capacity, while the accumulation of excrement stains the lint, significantly decreasing its commercial quality. Stained lint is difficult to bleach, which reduces the market value of the harvested crop.

Integrated Pest Management (IPM) is essential for controlling Oxycarenus gossypii. This includes timely harvesting to minimize the duration of exposure, cleaning fields of alternative malvaceous weeds, and applying chemical controls only when infestation levels exceed economic thresholds to ensure sustainable agricultural practices.