Scientific name
Scymnus (Pullus) castaneus Sicard (=Pullus castaneus)
Diagnosis
Length 2.10-2.40 mm, width 1.60-1.90 mm. Form oval, moderately convex; uniformly dark reddish brown to dark brown, pronotum slightly darker. Ventral side reddish brown to dark brown, legs lighter, yellowish brown. Pronotum and elytra densely punctate, punctations separated by 0.5-1.0 diameter.
Antenna (Fig. 1) 11-segmented. Prosternal intercoxal process with carinae (Fig. 2) strongly divergent towards posterior. Postcoxal line boat-shaped and obliterated towards anterolateral margin of first abdominal segment, appears to be incomplete; area enclosed coarsely punctate, inner margin smooth. Male genitalia (Figs. 3-5) as illustrated.
Figs. 1-5. Scymnus (Pullus) castaneus: 1. Antenna; 2. Prosternal intercoxal process; 3-5. Male genitalia: 3. Tegmen, lateral view; 4. Tegmen, ventral view; 5. Sipho.
Images
Distribution
Widely distributed in India. Bangladesh.
Prey / Associated habitat
HEMIPTERA: Aphididae: Aphis craccivora Koch, Aphis gossypii Glover, Aphis nerii Boyer de Fonscolombe, Aphis punicae Passerini, Melanaphis sacchari (Zehntner), Rhopalosiphum maidis (Fitch), Schoutedenia emblica (Patel & Kulkarni);
commonly associated with aphids infesting cotton, hibiscus, gliricidia, brinjal, beans, star gooseberry, cowpea, guava, Spathodea campanulata, etc. Pseudococcidae: Ferrisia virgata (Cockerell).
Seasonal occurrence
Present throughout the year in South India, particularly active during March-August.
References
- Sicard, A., 1929. Descriptions de quelques especes nouvelles de Coccinellides de la faunae Indo-Malaise. Annals and Magazine of Natural History, (10)3: 179-184.
- Puttarudriah, M. & Channabasavanna, G.P. 1955. Beneficial coccinellids of Mysore-II. Indian
Journal of Entomology, 17: 1-5.
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