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A Defoliating Pest of Akashmoni (acacia Auriculiformis A.) Seedlings in Bangladesh and Its Management

Kazi Ashad-uz-Jaman
Forest Protection Division, Bangladesh Forest Research Institute, Chattogram, Bangladesh

Md. Junayed
Forest Protection Division, Bangladesh Forest Research Institute, Chattogram, Bangladesh

Md. Zillur Rahman
Forest Protection Division, Bangladesh Forest Research Institute, Chattogram, Bangladesh

Shameema Nasrin
Forest Protection Division, Bangladesh Forest Research Institute, Chattogram, Bangladesh

Abstract/ Executive Summary:

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 invaded 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.

Keywords: Acashmoni, Bagworm, Cryptothelia crameri, Larvae, Seedling.

Location: Seed Orchard Division, Bangladesh Forest Research Institute, Chattogram, Bangladesh

Start Date: 00-10-2013

End Date: 00-11-2014

Program Area: Pest Management

Commodity: Pest

Objectives:

The present study is to know the nature of damage, infestation, biology, and control measures of the pest.

Methodology:

The study was conducted at the nursery of Seed Orchard Division of BFRI Chattogram from October 2013 to November 2014. During this time seedlings of A. auriculiformis were seriously infested by bagworm (Cryptothelia crameri Westwood) larvae. The experiment was laid out in a Completely Randomized Design (CRD) with three replications and four treatments. The data was collected on the seedling’s height (ft.), the number of branches of the seedlings. The number of insect infestations in a different age of Accacia auriculiformis seedlings were also recorded. Data on insect infestation, age and height of seedlings are collected at the same time. Nature of damage, characteristics of the cage and host range, etc were also collected. The larva of bagworm (Cryptothelia crameri Westwood) was collected from the infested seedlings and reared in the laboratory of the Forest Protection Division (FPD). To control the pest Ecomac 1.8 EC (@1ml/L), Acimix 55 EC(@1ml/L), Ripcord 10EC (@2m;/L) and Neem oil at (@4ml/L)concentration were tested in the laboratory by feeding the larva with insecticide sprayed leaves and data were recorded. Data were analyzed by Statistical test of Pearson’s Correlations between the height of plants and percentage of plants invaded for each age group. ANOVA followed by Turkey’s HSD method was performed to test the effect of chemical treatment after application against insect pest invaded which chemical treatment was statistically significant. All comparisons and statistical operations were performed in MS Excel 2010 and SPSS 16.0.

Source of Information: Int. J. Biosci. 18(6), 139-145, June 2021.

Article Link (Online Journal): DOI: http://dx.doi.org/10.12692/ijb/18.6.139-145

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

There is no record of Cryptothelia crameri as a defoliator of Acacia auriculiformis in Bangladesh and other neighboring countries such as India, Indonesia, and Srilanka. This is a new pest of A. auriculiformis in our country. So it needs further detailed and elaborate research.

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