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Pest and Natural Enemy Incidence in Light Trap

Mahfuj Ara Begum
Senior Scientific Officer
Entomology Division, BRRI, Gazipur-1701

Md. Panna Ali
Scientific Officer
Entomology Division, BRRI, Gazipur-1701

Abstract/ Executive Summary:

Light trap catch of BRRI Gazipur showed the highest number of insect pests. GLH population had two peaks in April - May and October like previous years. The YSB population was peaked in Gazipur during May and in Barisal a peak was also observed during the month of November. Rice leaffolder (RLF) population was higher at Barisal like previous years. The highest number of NE in light trap was observed at Gazipur. Green mirid bug (GMB), CDB, staphylinid beetle (STPD) and LBB dominated the population in general but species specific dominance varied among the locations

Keywords: Light trap, Pests, Natural enemy, Incidence, Rice

Location: BRRI,Gazipur and BRRI reginal station Comilla, Habiganj, Barisal and Rajshahi

Start Date: 01-07-2008

End Date: 30-06-2009

Program Area: Pest Management

Commodity: Rice

Objectives:

To study the pest and their natural enemy incidence patterns in light trap and to create a database.

Methodology:

Rice insect pests and their natural enemies were monitored throughout the year by light trap from July 2008 to June 2009 at BRRI headquarter, Gazipur and BRRI regional stations at Comilla, Habigonj, Barisal and Rajshahi.

Source of Information: Proceedings of the BRRI Annual Internal Review, 2008-09

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The incidence of insect pests was higher at Gazipur than the regional stations. The total number of insect pests collected by light trap, was the highest at Gazipur and were followed by Barisal, Rajshahi, Habiganj and Comilla respectively. The abundance of GLH, WLH, Zigzag leafhopper (ZLH), BPH, WBPH, YSB, RLF and LHC was noticed higher than that of the other insect pests. The GLH population showed the two peaks like previous years. The larger peak was found in May and the other one in October. The highest number of BPH was observed in Gazipur during May. The population of YSB was peaked in Gazipur during May and in Barisal a peak was also observed during the month of November. The abundance of RLF was higher in Barisal and peaked during November. Like insect pests, maximum number of natural enemies were recorded at Gazipur. Ladybird beetle (LBB), carabid beetle (CDB), staphylinid beetle (STPD) and green mirid bug (GMB) were the dominating predator in all the five locations. The dominating population of LBB and CDB were found higher at Rajshahi in May, but the population of STPD and GMB for the year were higher at Gazipur. A higher population of STPD was also observed at Gazipur and Comilla during December. GMB showed a peak in Rajshahi during May.

Knowledge Management: Report/Proceedings