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

Incidence of Major Insect Pests and Natural Enemies in Three Rice Growing Seasons of Bangladesh

Sadia Afrin
Scientific Officer
Entomology Division, BRRI, Gazipur

Abstract/ Executive Summary:

Incidence of insect pests and their associated natural enemies was investigated from July 2017- June 2018 at six locations (Gazipur, Rajshahi, Barishal, Sonagazi, Rangpur, Cumilla) of Bangladesh to identify their major occurrence period and their incidence in three rice growing seasons. Among the tested locations, marked differences were found in insect pest and natural enemies. At least one peak for major insect pest and natural enemies suggested their specific occurrence period across the locations. Among insect pests, BPH population was 10,000 individuals for Gazipur in October during T. Aman season. Additionally, it was high at Rajshahi in October and November with 2,000 individuals of BPH. For YSB, it was higher at Rajshahi during T. Aman. Among natural enemies, CDB population was observed mainly at three locations in between October and November with 900 individuals for Gazipur, 400 individuals for Rajshahi, and 200 individuals for Barishal during T. Aman. However, higher incidence of insect pest at Gazipur and Rajshahi suggested availability of insect pests during T. Aman. Incidence of natural enemies at Gazipur indicated presence of greater biological control compared with other locations. In future, this information could serve as a reliable source in strengthening rice pest monitoring services in Bangladesh.

Keywords: Insect pest, Incidence, Natural enemies, Rice (Oryza sativa L.)

Location: Six locations (Gazipur, Rajshahi, Barishal, Sonagazi, Rangpur, Cumilla) of Bangladesh

Start Date: 01-07-2017

End Date: 30-06-2018

Program Area: Pest Management

Commodity: Insects

Objectives:

This study was undertaken to investigate incidence of major insect pest and natural enemies in three rice growing seasons, Aus, T. Aman, and Boro

Methodology:

Rice insect pests and their natural enemies was monitored using light trap across six locations of Bangladesh including Gazipur, Cumilla, Barishal, Rajshahi, Sonagazi and Rangpur. Light trap with certain modifications were incorporated in accordance with essential requirements. The trap had four parts i.e. collecting chamber, funnel shaped lid, light source and a lid from the top to protect from unexpected showers. The light source was a 100W normal electrical bulb, 200 cm above the ground. The light trap (BRRI, Gazipur, Bangladesh) was constructed in 1973 and has been used since then for monitoring insect pests and natural enemies of rice pests (Ali et al., 2014). Trapped insect pests and natural enemies were collected every day, recorded and deposited along with monthly total tallies for July 2017 to June 2018.

Source of Information: BRRI Annual Report

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In this study, higher number of population in Gazipur, Rajshahi, and Barishal suggested higher incidence of insect population in the rice growing period. Frequent peaks for major insect pests and natural enemies in a specific month suggested incidence of insect population in both seasons. Among three rice growing seasons, T. Aman had higher incidence of insect pest and natural enemies across the observed locations. Additionally, presence of higher amount of insect pest in the month of October indicated most favorable time of pest emergence in the calendar year. Moreover, fluctuations of natural enemies among the growing seasons indicated possibility of biological control against major insect pests. In future, location specific population study in multiple years could enable us to find and discuss existing relationship between major insect pests and natural enemies.

Knowledge Management: Report/Proceedings