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A defoliating pest of Akashmoni (Acacia auriculiformis A.) seedlings in Bangladesh and its management

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Research Paper 01/06/2021
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A defoliating pest of Akashmoni (Acacia auriculiformis A.) seedlings in Bangladesh and its management

Kazi Ashad-uz-Jaman, Md. Junayed*, Md. Zillur Rahman, Shameema Nasrin
Int. J. Biosci.18( 6), 139-145, June 2021.
Certificate: IJB 2021 [Generate Certificate]
Key: Acacia auriculiformisBagwormCryptothelia crameriLarvaeSeedling

Abstract

Akashmoni (Acacia auriculiformis A. Cunn. ex Benth) is an economically important forest tree species that is seen everywhere in Bangladesh. There is no available report on Akashmoni defoliator in the country but recently huge damage was caused by an insect [Cryptothelia crameri Westwood (Psychidae: Lepidoptera)] in the Seed Orchard nursery of Bangladesh Forest Research Institute (BFRI), Chattogram was recorded. The larva of the insect starts infestation both in the nursery and young plantations and feeds on young leaves and tender barks. Insect larvae build a special portable bag of leaves and other parts of the plants and live within this bag. The statistical test of Pearson’s correlation between the heights of plants with the percentage of plants attacked for each age group indicated that there is moderate to high positive correlation at 12, 6 and 3 months age-old seedlings. One-year-old seedlings are highly susceptible to infestation (53%) for the pest. The biology, host range, infestation and ecology of the pest have been discussed in this paper. Chemical pesticides Ecomac 1.8 EC (@1ml/L), Acimix 55 EC(@1ml/L), Ripcord 10EC (@2m;/L) and botanical pesticide Neem oil (@5ml/L) were applied to control the pest in the nursery. Among these Acimix 55 EC showed the best performance killed 100% larvae of the insect followed by Ecomac 1.8 EC, Ripcord 10 EC and Neem oil killed 45%, 30% and 5% larvae respectively.

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