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Abundance and Species Composition of Rice Green Leafhopper (hemiptera: Cicadelladae) in Different Ecosystems

Mahfuj Ara Begum
SSO
Entomology Division BRRI, Gazipur 1701

Nur Ahmed
CSO (C.C) & Head
Entomology Division BRRI, Gazipur 1701

Mainul Haq
CSO (Ex.)
Entomology Division BRRI, Gazipur 1701

Abstract/ Executive Summary:

The abundance, incidence pattern and species composition of green leafhopper (GLH) in seedbed, rice field and light trap were studied in three rice growing seasons in Bangladesh during 2004 and 2005. Five species of GLH viz., Nephotettix virescens, N. nigropictus, N. malayanus, N. parvus and N. cincticeps were recorded. The first two species were most important as their presence were higher in number almost all the year round. More GLH was observed in 2005 compared to 2004 in all habitats. The GLH population was higher in seedbed than transplanted rice. Among 5 species of GLH, N. nigropictus was found higher in summer and winter rice seedbed during 2005. Nephotettix virescens was dominant in summer rice seed bed in both the year and transplanted monsoon rice field in the year 2005. The number of other 3 species of GLH was comparatively low in all the season and habitats. Temperature and rainfall influenced the population of GLH. The fluctuation of GLH population in the rice field did not always represent the fluctuation of light trap catches. The abundance of 5 GLH species in the order of N. virescens> N. nigropictus> N. malayanus> N. cincticeps > N. parvus.

Keywords: Rice green leafhopper, Species composition, Ecosystems

Location: BRRI farm, Gazipur

Start Date: 00-00-2004

End Date: 00-00-2005

Program Area: Pest Management

Commodity: Insects

Objectives:

The present study is aimed to investigate the abundance of GLH in different habitats, species composition of GLH and abundance pattern in successive crop seasons.

Methodology:

Light trap collection:The GLH population was monitored daily using a light trap. The light trap device was permanently set up at the rice farm of Bangladesh Rice Research Institute (BRRI), Gazipur (24°0'0″N, 90°25'48″E). A 100 WATT white fluorescent bulb was set up for lighting and it was put on 12 hr, from dusk to dawn, then next morning, dead/killed arthropods were collected, identified and counted under microscope at the Laboratory of Entomology Division. To kill the arthropods insecticides were sprayed in the metal box which set up under the trap. Monthly GLH catches from January to December in 2004 and 2005 were calculated for light trap study. Field collection of GLH:Field collection of GLH was made by 100 complete sweep- net (30 cm diameter, double stroke) for two years ( 2004, 2005) covering Boro rice (winter rice), Aus (summer rice) and Aman rice (monsoon rice) seasons on weekly basis. Week number was denoted after Lews & Taylor (1967). Two rice ecosystems (seed bed, rice field) were used in this study. Sampling was done from four fields, (field size about 700 m², seedbed size 1X 32 m²) each field represents a replication. GLHs were collected from whole field randomly by hand sweep net on rice canopy of each field. Furthermore, rainfall (mm), temperature (maximum and minimum in ⁰C), relative humidity data were collected from Plant Physiology Division of BRRI.

Source of Information: International Journal of Biosciences, 4(6): 74-79; 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The fluctuation of GLH population in the rice field did not always represent the fluctuation of light trap catches. The abundance of five GLH species in the order of N. virescens > N. nigropictus > N. malayanus > N. cincticeps > N. parvus.

Knowledge Management: Journal