Millets and Maize | Tetraneura nigriabdominalis
Tetraneura nigriabdominalis (Sasaki, 1899); Common Name: Ragi root aphid
Taxonomy Information
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Hemiptera
Superfamily
Aphidoidea
Family
Aphididae
Subfamily
Pemphiginae
Genus
Tetraneura
Species
nigriabdominalis
Author
(Sasaki, 1899)
Field Identification

The adult is small and oval. Its color ranges from greenish, to brownish white, to yellow, and to dark orange. There are two adult forms: the winged and nonwinged forms. The winged adults are 1.5-2.3 mm long. The nonwinged forms are 1.5-2.5 mm long. All adults are females. The nymph is globular and tan or brown.

Damage

Infested plants turn pale yellow and become stunted. Wilting and drying of plants in patches. Black ants attend them for honeydew and their presence confirm the root aphid attack.

Key Natural Enemies

Aphidius sp., Paragus serratus, etc.

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