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Studies on the Seasonal Abundance of Major Insect Pests of Tea

Dr. Mainuddin Ahmed
Prinicipal Scientific Officer
Entomology Division, BTRI, Srimangal, Moulvibazar

Md. Kabirul Bashar
Scientific Officer
Entomology Division, BTRI, Srimangal, Moulvibazar

Abstract/ Executive Summary:

Investigation on the seasonal abundance of tea pests in different valley circles was assessed from the tea estate's monthly report. It was revealed that the prevalence of termites, Helopeltis, red spider mite, flushworm, aphids, nematodes were comparatively more. The infestation of mite was pronounced from April and attained peak during July and declined from August onwards. In case of seasonal abundance of Helopeltis, the critical infestation appeared in beginning of the cropping season during March. This became again acute during June-July and October-December. Though the presence of termite remained throughout the year yet its occurrence was more pronounced during dry period i.e. January-April

Keywords: Seasonal abundance, Tea pests, Valley circles

Location: Different tea estates of greater Sylhet

Start Date: 01-01-1983

End Date: 31-12-2004

Program Area: Pest Management

Commodity: Insects

Objectives:

To investigate seasonal abundance of major insect pests of tea in different valley circles of greater Sylhet

Methodology:

The incidence data of various insect pests of different valley circles of greater Sylhet was collected through BTRI questionnaire format. Data were then analyzed critically and the findings are made in present form.

Source of Information: Biennial Report 2003-2004

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The prevalence of termites, Helopeltis, red spider mite, flushworm, aphids, nematodes were comparatively more. The infestation of mite was pronounced from April and attained peak during July and declined from August onwards. In case of seasonal abundance of Helopeltis, the critical infestation appeared in beginning of the cropping season during March. This became again acute during June-July and October-December. Though the presence of termite remained throughout the year yet its occurrence was more pronounced during dry period i.e. January-April

Knowledge Management: Report/Proceedings