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Performance of Susceptibility of Twenty Rice Varieties to Different Insect Pests

K.R. Das
Department of Agricultural Extension, Dhaka

M.N. Uddin
Department of Entomology, Hajee Mohammad Danesh Science and Technology University, Dinajpur

M.M.H. Bhuyan
Department of Entomology, Hajee Mohammad Danesh Science and Technology University, Dinajpur

K.S. Islam
Department of Entomology, Bangladesh Agricultural University, Mymensingh

M. Jahan
Department of Entomology, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

Susceptibility of twenty rice genotypes to different insect pests was determined in Aman season during August to November, 2003 at the Bangladesh Agricultural University (BAU), Mymensingh. Seven different species of rice pests viz. Leaf folder, Green leafhopper, White backed plant hopper, Grasshopper, Rice bug, Rice hairy caterpillar and Brown plant hopper were present during the study period. Among the twenty rice varieties BR3 was most susceptible and Pajam was moderately susceptible to all the observed insects. Considering damage percentage, BR3 and Sonarbangla were most susceptible varieties; while Pajam, BR22, BRRI dhan 29 and BRRI dhan 31 were less susceptible and the varieties Binashail, BR4 and BR11 were found as moderately susceptible.

Keywords: Susceptibility, Rice varieties, Insect pests

Location: Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-08-2003

End Date: 00-11-2003

Program Area: Pest Management

Commodity: Rice

Objectives:

1. To judge the performance of twenty rice varieties against pest infestation at different growth stages of rice.

Methodology:

Experiment was carried out in T-aman season during August to November, 2003 to determine susceptibility of different rice varieties to various insect pests. The field experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications taking twenty rice varieties viz. BR3, BR4, BR11, BR22, BRRI dhan 29, BRRI dhan 30, BRRI dhan 31, BRRI dhan 32, BRRI dhan 34, BRRI dhan 37, BRRI dhan 38, BRRI dhan 39, BRRI dhan 40, BRRI dhan 41, BINA dhan-4, BINA dhan-6, Binashil, Anamika, Sonarbangla and Pajam. The test varieties were grown following the standard method of cultivation. No pesticide was used in the experimental fields and no other plant protection measure was applied. Insect samples were collected in two ways viz. by sweeping nets and by observing tillers. In case of sweeping five complete sweeps were made per plot diagonally. After each sweeping samples were collected, identified and counted. In case of tiller observation, five hills per plot (Plot size 3m X 1.6m) were selected randomly. After hill selection, no. of total tiller and damaged tiller were counted to find out the damage percentage as follows: Damage percentage = (Total number of infected tiller / Total no of tiller) X 100. Data were recorded in three crop growth stages viz. early vegetative stage, late vegetative stage and reproductive stage. The data were analyzed using the statistical package MSTAT program. Analysis of Variance (ANOVA) of the results on various insect pests was calculated. The significant means were compared by Duncan’s New Multiple Range Test.

Source of Information: J. Agrofor. Environ. 2(2): 53-56, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Among the twenty rice varieties BR3 was most susceptible and Pajam was moderately susceptible to all the observed insects. Considering damage percentage, BR3 and Sonarbangla were most susceptible varieties; while Pajam, BR22, BRRI dhan 29 and BRRI dhan 31 were less susceptible and the varieties Binashail, BR4 and BR11 were found as moderately susceptible.

Knowledge Management: Journal