Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi

The Brown Planthopper (BPH) Nilaparvata lugens have been known to infest the various variety of paddy rice. This insect pest belongs to the order of Homoptera and the family of Delphacidae. BPH damage the paddy crops by directly feeding on phloem and indirectly by transmitting plant diseases such as...

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Main Author:	Sanusi, Siti Aisyah
Format:	Student Project
Published:	Faculty of Plantation and Agrotechnology 2018
Subjects:	SB Plant culture Pests and diseases Insecticides
Online Access:	http://ir.uitm.edu.my/id/eprint/22870/

id	uitm-22870
recordtype	eprints
spelling	uitm-228702019-05-15T01:21:17Z http://ir.uitm.edu.my/id/eprint/22870/ Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi Sanusi, Siti Aisyah SB Plant culture Pests and diseases Insecticides The Brown Planthopper (BPH) Nilaparvata lugens have been known to infest the various variety of paddy rice. This insect pest belongs to the order of Homoptera and the family of Delphacidae. BPH damage the paddy crops by directly feeding on phloem and indirectly by transmitting plant diseases such as stunting and wilting. Insecticides commonly used to kill BPH without recommended dose will affect animals and the environment. Insecticides have different action modes. Some insects will react to insecticides differently. It depends on the type of contact. Such insecticide contact by enters the body of insects and other types of insecticides enter the body through the insect tracheal system. Each insecticide has a different toxicity level to insect pest. The toxicity of insecticide is measured by the point at which 50% of the insect population is killed and known as Lethal Dose, (LD50) or Lethal Concentration (LC50). The LD50 is very important in order to determine the effectiveness of insecticides against BPH. Three selected insecticides which currently used by farmers were tested by using bioassay method. The insecticides were namely Fipronil 97.5%, Imidacloprid 99.9%, and Cypermethrin 94.3%, with five concentrations of each insecticide. Data of LD50 was analysed using special PROBIT PoloPlus Analysis. It provides estimates of median lethal dose of specified mortality levels (such as LD50, LD90, and LD95) which can be used for statistical comparison of each preparation with a standard. Fipronil 97.5% was the most toxic insecticides among these three selected insecticides used, with LD50 was 127.979 ng/g. Followed by Imidacloprid 99.9% was 283.062 ng/g. While the less toxic was Cypermetrin with the LD50 value was 441.395 ng/g. This study important to farmers when applying insecticides in recommended IPM program so that the insect do not built the resistance in the farm. Faculty of Plantation and Agrotechnology 2018 Student Project NonPeerReviewed Sanusi, Siti Aisyah (2018) Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi. [Student Project] (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Teknologi MARA
building	UiTM Institutional Repository
collection	Online Access
topic	SB Plant culture Pests and diseases Insecticides
spellingShingle	SB Plant culture Pests and diseases Insecticides Sanusi, Siti Aisyah Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi
description	The Brown Planthopper (BPH) Nilaparvata lugens have been known to infest the various variety of paddy rice. This insect pest belongs to the order of Homoptera and the family of Delphacidae. BPH damage the paddy crops by directly feeding on phloem and indirectly by transmitting plant diseases such as stunting and wilting. Insecticides commonly used to kill BPH without recommended dose will affect animals and the environment. Insecticides have different action modes. Some insects will react to insecticides differently. It depends on the type of contact. Such insecticide contact by enters the body of insects and other types of insecticides enter the body through the insect tracheal system. Each insecticide has a different toxicity level to insect pest. The toxicity of insecticide is measured by the point at which 50% of the insect population is killed and known as Lethal Dose, (LD50) or Lethal Concentration (LC50). The LD50 is very important in order to determine the effectiveness of insecticides against BPH. Three selected insecticides which currently used by farmers were tested by using bioassay method. The insecticides were namely Fipronil 97.5%, Imidacloprid 99.9%, and Cypermethrin 94.3%, with five concentrations of each insecticide. Data of LD50 was analysed using special PROBIT PoloPlus Analysis. It provides estimates of median lethal dose of specified mortality levels (such as LD50, LD90, and LD95) which can be used for statistical comparison of each preparation with a standard. Fipronil 97.5% was the most toxic insecticides among these three selected insecticides used, with LD50 was 127.979 ng/g. Followed by Imidacloprid 99.9% was 283.062 ng/g. While the less toxic was Cypermetrin with the LD50 value was 441.395 ng/g. This study important to farmers when applying insecticides in recommended IPM program so that the insect do not built the resistance in the farm.
format	Student Project
author	Sanusi, Siti Aisyah
author_facet	Sanusi, Siti Aisyah
author_sort	Sanusi, Siti Aisyah
title	Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi
title_short	Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi
title_full	Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi
title_fullStr	Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi
title_full_unstemmed	Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi
title_sort	toxicity determination of the brown planthopper (nilaparvata lugens) on paddy (oryza sativa) towards selected insecticides / siti aisyah sanusi
publisher	Faculty of Plantation and Agrotechnology
publishDate	2018
url	http://ir.uitm.edu.my/id/eprint/22870/
first_indexed	2023-09-18T23:09:35Z
last_indexed	2023-09-18T23:09:35Z
_version_	1777418712146509824

Toxicity determination of the brown planthopper (Nilaparvata lugens) on paddy (Oryza sativa) towards selected insecticides / Siti Aisyah Sanusi

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