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Evaluation of Commercial Insecticides Against Major Insect Pest of Rice

Sheikh Shamiul Haque
Senior Scientific Officer
Entomology Division, BRRI, Gazipur-1701

Dr. Mainul Haq
CSO and Head
Entomology Division, BRRI, Gazipur-1701

Abstract/ Executive Summary:

Due to environmental changes and intensive cultivation, outbreaks of insect pests is most common. To control this outbreaks new insecticides are essential. Every year different commercial formulations of insecticides are imported from different companies for registration. The experiments were conducted to evaluate the commercial formulations of insecticides against different insect pest of rice. The experiment were laid out in a CRD with four replications and the individual plot size was 20 m² (4 m X 5 m) . One hour after spraying ten 3rd-4th instar BPH nymphs or adult rice hispa beetle were confined by mylar film cage on each of four randomly selected rice hills. Each hill represented a replication. The granular insecticides were broadcasted one day before infestation. Mortality of insects was counted at 24 and 48 hours after treatment (HAT) and results were adjusted by Abbott's formula. For yellow stemborer trial, four randomly selected rice hills/plot were separately infested with YSB egg masses. Each hill represented a replication. One day after hatching insecticides were applied. The dead hearts were counted 20 days after insecticides application. A total of 53 commercial formulations of 16 generic products were tested against brown planthopper (BPH), rice hispa ( RH) and yellow stemborer (YSB). Among them 29 formulations (11 generic products) against BPH, 29 against RH and 6 (4 generic products) against SB were found effective (giving more than 80% mortality).

Keywords: Rice, Insecticide, Evaluation, BPH, YSB and RH

Location: BRRI, Gazipur

Start Date: 01-07-2006

End Date: 30-06-2007

Program Area: Pest Management

Commodity: Insecticide

Objectives:

To evaluate the efficacy of different commercial formulations of insecticide against major insect pests of rice

Methodology:

The experiments were laid out in a CRD with four replications and the individual plot size was 20 m² (4m X 5m). One hour after spraying ten 3rd-4th instar BPH nymphs or adult rice hispa beetle were confined by mylar film cage on each of four randomly selected rice hills. Each hill represented a replication. The granular insecticides were broadcasted one day before infestation. Mortality of insects was counted at 24 and 48 hours after treatment (HAT) and results were adjusted by Abbott's formula. For yellow stemborer trial, four randomly selected rice hills/plot were separately infested with YSB egg masses. Each hill represented a replication. One day after hatching insecticides were applied. The dead hearts were counted 20 days after insecticides application.

Source of Information: Proceedings of BRRI Annual Internal Review for 2006-2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Twenty-nine insecticides (13 in Aus and 16 in Boro) were found effective (gave more than 80% mortality) against BPH. Twenty-nine insecticides (14 in Aus and 15 in Boro) were effective against RH. Six insecticides tested against yellow stem borer reduced dead heart 80% or above.

Knowledge Management: Report/Proceedings