Aphid- Aphis gossypii
Cotton aphid: Aphis gossypii: Aphididae: Homoptera.
ü Polyphagous
pest-wider host range.
ü Both
nymph and adult infest the tender portions of the plants in colonies.
ü Very
small brownish green, soft bodied insects. Males are winged; in females both
winged and wingless forms are found.
ü The
females are parthenogenetic and viviparous. One female can produce 8-22 nymphs
during their life span of 7-9 days.
ü
The leaves become curled up, the young shoot
fades gradually and whole plant becomes very much stunted. Sooty mould on
plant.
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