A Scientific Report on Infestation and Biology of Orange Drinker, Euthrix laeta (Walker, 1855) (Lepidoptera: Lasiocampidae) on Shisham (Dalbergia sissoo Roxb.) from Assam, India

• Published in: National Academy science letters 2023-02, Vol.46 (1), p.23-26
• Main Authors: Karmakar, Prasun, Mishra, Akshay, Borah, Chandan, Hamid, Abdul, Deka, Arabinda, Srikanth, P. S.
• Format: Article
• Language: English
• Subjects: Biology; Dalbergia sissoo; DNA nucleotidylexotransferase; Eggs; Elimia laeta; Fecundity; Females; History of Science; Humanities and Social Sciences; India; Infestation; instars; Larvae; Lasiocampidae; Lepidoptera; multidisciplinary; pests; Pupae; Science; Science (multidisciplinary); Seedlings; Short Communication; Trees
• ISSN: 0250-541X; 2250-1754
• DOI: 10.1007/s40009-022-01189-5

The infestation and biology of Orange Drinker, Euthrix laeta (Walker, 1855) (Lepidoptera: Lasiocampidae) on Shisham ( Dalbergia sissoo Roxb.) were studied and reported from Assam, India, in this short communication. The female lays 13–17 spherical eggs in batches on the stem of the young seedlings with a total fecundity of 200–232 eggs per female. The final instar larvae were brownish to ash grey with distinct patterns and measured 6.7–9.5 cm in length. The pupa is 2.6 cm long, brown and held inside a white papery cocoon attached firmly to the stem. The pest completed four generations in a year. The E. laeta larva severely defoliates D. sissoo during the seedling stage in nurseries, causing the drying of seedlings. E. laeta larva caused 10–75.26% damage in D. sissoo plus trees. The D. sissoo plus trees ‘TST-1’ showed the highest per cent damage (75.26%) by E. laeta larva. The D. sissoo plus trees ‘TDT-2’ showed the minimum damage (10%) by E. laeta larva.