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 Insect Morphology and SystematicsInsect Morphology and Systematics 16248680811470158, Chin sevish Abdurauf Fitrat - 11.03.2016 16-14-20, 5 sinf 1-Mavzu Biologiya hayot haqidagi fan, 1-mavzu. Hasharotlar ekologiyasi fani rivojlanish tarixi
9. APHIDIDAE (Aphids or Plant lice or Greenflies)
Body is pear shaped
Both apterous and alate forms are found.
A pair of cornicles or siphonculi or wax tubes is present in the dorsum of fifth or sixth
abdominal segments which secretes wax like substance.
They excrete copious amount of honey dew on which ants feed and sooty mould fungus
grows.
Aphids are known for their extraordinary fecundity, short life cycle and parthenogenitic
reproduction. Life cycle is highly complex and it involve alternation of generation.
They feed on plant sap and disseminate plant diseases.
e.g. Cotton aphid
Aphis gossypii
.
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