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Symptoms of Rice Root aphid
1. Attacked plants appear yellowish and the leaf tips become curled up and dried.
2. The soil around the plants becomes loose and ants are found frequently in association with aphids.
Management of Rice Root aphid
1. Several natural enemies are recorded: a braconid wasp Aphidius sp. and a mermithid nematode Mermis sp. are recorded parasites of nymphs and adults.
2. Coccinellids such as Menochilus sexmaculatus (Fabricius) and Harmonia octomaculata (Fabricius) feed on nymphs and adults.
Insect Pests of Rice by M. D. Pathak and Z. R. Khan , INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU ET.AL., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA