Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Pest and Natural Enemy Incidence at BRRI Farms

Nadira Afsana
Scientific Officer
Entomology Division, BRRI, Gazipur-1701

Dr. N. Q. Kamal
CSO and Head
Entomology Division, BRRI, Gazipur-1701

Abstract/ Executive Summary:

Rice insect pests, their natural enemies and crop damage intensities in seven habitats were monitored weekly at BRRI farm, Gazipur and found low to moderate incidence of insect pests in all the seasons. Insect pest and natural enemy populations were higher in seed bed and transplanted rice with water. Green leafhopper (GLH), white leafhopper (WLH) and grasshopper (GH) were the dominant pest. Spiders, ladybird beetle (LBB), carabid beetle (CDB and damselfly were the major predators during the year. The damage due to insect pests was below the ETL level.

Keywords: Pest, Natural enemy, BRRI farm

Location: BRRI, Gazipur

Start Date: 01-07-2002

End Date: 30-06-2003

Program Area: Pest Management

Commodity: Insects

Objectives:

To study the incidence pattern and status of rice insect pests
To develop a forecasting system for possible pest outbreak.

Methodology:

Populations of rice insect pests, their natural enemies and crop damage intensities in seven habitats (seedbed, rice ratoon, grass field, grassy bunds, rice with water, rice without water and rice bunds) were monitored weekly at BRRI farm, Gazipur. One hundred complete sweeps were made in each habitat and the pest and natural enemies collected were counted. In addition, damage intensity due to insect pest and their populations were also estimated from 20 randomly selected hills in each week.

Source of Information: Proceedings of BRRI Annual Internal Review for 2002-2003

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Green leafhopper (GLH), white leafhopper (WLH) and grasshopper (GH) were the most abundant pests and found in all the habitats. Brown planthopper (BPH) and white backed planthopper (WBPH) were mainly concentrated in seedbed and rice fields. But the rice bug (RB) population was found in seedbed, rice fields also in the ratoon. Orange headed leafhopper (OHLH) was found in seedbed in both T. Aman and Boro season. Pest populations were much higher in seedbed followed by rice field with water. Among the natural enemies, spiders (SPD), ladybird beetle (LBB), carabid beetle (CDB) and damselfly (Dam. fly), were the dominant predators. Incidence of assassin bug (reduviidae) was found in Aus season. Direct hill count showed that population and the damage done by insect pests were below the ETL in all the three rice seasons. However, damage due to stem borer at vegetative stage (dead heart) was comparatively higher in Aus and T. Aman.

Knowledge Management: Report/Proceedings