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

Toxic Effects of Insecticides Against Rice: Brown Planthopper and Its Predators

T. K. Biswas
M S Student
Department of Entomology, Bangladesh Agriculture University, Mymensingh, Bangladesh.

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

M. A. Rahman
Department of Entomology, Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh.

M. M. H. Khan
Department of Entomology, Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh.

M. A. Rahman
Technical Officer
Mennonite Central Committee, Sirajgonj, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted in a net house and a laboratory to determine the effect of cypermethrin (Cymbush) and carbofuran (Brifer) against the rice brown planthopper (Nilaparvata lingens Stal) and its predators, Micraspis discolor (lady bird beetle) and Lycosa pseudoannulata (Spider). Toxic effect of the insecticides was assessed on the basis of percentage corrected mortaliyies of brown planthopper and the predators under laboratory condition at 24, 48 and 72 hours after treatment. Cypermethrin @ 0.05 kg a. i./ha caused 100% mortality of insect populations at different time intervals. All the doses of carbofuran caused a good mortality of N. lugens at different time intervals and was effective at higher dose. Cypermethrin @ 0.04 kg a.i./ha and carbofuran @ 0.5 kg a.i./ha were very effective against N. lugens. The effectiveness of cypermethrin decreased and carbofuran increased with increasing time interval. The former at 0.05 kg a.i./ha was less toxic to both the predators. Carbofuran @ 0.5 kg a.i./ha was least toxic to the predators. Between the two predators, L. pseudoannulata was more susceptible to the insecticides than M. discolor.

Keywords: Cypermethrin, Carbofuran, Nilaparvata lugens, Micraspis discolor, Lycosa pseudoannulata.

Location: Bangladesh Institute of Nuclear Agricultural (BINA), Mymensingh.

Start Date: 01-03-2002

End Date: 30-07-2002

Program Area: Pest Management

Commodity: Insecticide

Objectives:

1. To evaluate the effectiveness of two insecticides in controlling BPH under laboratory condition;

2. To find out the doses of insecticides least toxic to the predators.

Methodology:

An experiment was carried out in a net house and a laboratory of the Entomology Division, Bangladesh Institute of Nuclear Agricultural (BINA), Mymensingh from March to July, 2002. Two insecticides, carbofuran (Brifer 5G) and cypermethrin (Cymbush 10EC) were selected for their evaluation on adult stages of the predator lady bird beetle, M. discolor and wolf spider, L. pseudoannulata in association with BPH. The experiment was laid out of in a completely randomized design with three replications. Ten adults of the predators per replication were treated separately at 24, 48 and 72 hours after treatment (HAT) with insecticides. Data obtained from the net house experiment in the laboratory were analyzed for two factors Completely Randomized Design (CRD). The means were compared according to Duncan’s Multiple Range Test.

Source of Information: SAARC JOURNAL OF AGRICULTURE, Vol. 4, 2006, pp. 99-112, ISSN 1682-8348, SAARC Agricultural Information Centre.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study results revealed that all the doses of carbofuran caused a good mortality of N. lugens at different time intervals and was effective at higher dose. Cypermethrin @ 0.04 kg a.i./ha and carbofuran @ 0.5 kg a.i./ha were very effective against N. lugens. The effectiveness of cypermethrin decreased and carbofuran increased with increasing time interval. The former at 0.05 kg a.i./ha was less toxic to both the predators. Carbofuran @ 0.5 kg a.i./ha was least toxic to the predators. Between the two predators, L. pseudoannulata was more susceptible to the insecticides than M. discolor.

Knowledge Management: Journal