Plantwise Factsheets for Farmers
Dusky Cotton Bug
Recognize the problem
Though the bug sucks cell sap from leaves, flowers and growing soft
tissues of upper stem, the main damage is when they get crushed at the time of
ginning, thus staining the lint and decreasing the market value of the cotton.
The bugs suck the sap in groups from the immature seed which consequently do
not ripen and remain light weight. The bugs also cause nuisance to workers
The adults are about half the size of a fingernail and are dark brown
in colour. The winged adults have dirty white semi-transparent wings and the
young are round. The eggs, laid on the lint of half opened bolls of cotton, are
white and cigar shaped. They are laid in clusters of 3-18.
The dusky cotton bug used to be a minor pest of cotton but its
importance has grown in the last few years, as populations are becoming larger.
A number of generations throughout the year have been observed. Dusky cotton
bugs also live on other plants, such as okra.
control is to remove alternate host plants like okra etc. before and near the
- Collect the
adults and nymphs by shaking the bolls into vessels with kerosinised water
- Spray chlorpyriphos @ 1000ml per 100
litres of water
When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.
The recommendations in this factsheet are relevant to:
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