Preliminary study of resistance in 4 populations of Helopeltis theobromae Miller Hemiptera: Miridae to alpha-HCH Propoxur and Dioxacarb

Khoo K.C., . and Dzolkhifli Omar, . and Rita Muhamad, . and Ho C.T., . (1986) Preliminary study of resistance in 4 populations of Helopeltis theobromae Miller Hemiptera: Miridae to alpha-HCH Propoxur and Dioxacarb. [Proceedings Paper]

Four populations of Helopeltis theobromae Miller were investigated in Peninsular Malaysia for the existence of resistance to alpha-HCH propoxur and dioxacarb by means of time-response assays. The insects were confined on treated filter paper and time to knockdown was recorded to establish lethal exposure time LT50 and percentage survival. The order of sensitivity of different populations to alpha-HCH was Serdang Bagan Datoh Teluk Intan Intan Kajang; and to dioxacarb Serdang Kajang was consistently most sensitive or susceptible to all three insecticides. The Kajang population the only one showing tolerance or resistance having an LT50 value three times higher than the Serdang population; the survival after 4 hr continuous exposure was 36 for the former and nil for the latter. The existence of differential sensitivity to each of the three insecticides between the four populations indicated an impending resistance problem.

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Abstract

Four populations of Helopeltis theobromae Miller were investigated in Peninsular Malaysia for the existence of resistance to alpha-HCH propoxur and dioxacarb by means of time-response assays. The insects were confined on treated filter paper and time to knockdown was recorded to establish lethal exposure time LT50 and percentage survival. The order of sensitivity of different populations to alpha-HCH was Serdang Bagan Datoh Teluk Intan Intan Kajang; and to dioxacarb Serdang Kajang was consistently most sensitive or susceptible to all three insecticides. The Kajang population the only one showing tolerance or resistance having an LT50 value three times higher than the Serdang population; the survival after 4 hr continuous exposure was 36 for the former and nil for the latter. The existence of differential sensitivity to each of the three insecticides between the four populations indicated an impending resistance problem.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. mal SB267 I61 1984 Call Number
AGROVOC Term:	HEMIPTERA
AGROVOC Term:	INSECTOS DANINOS
AGROVOC Term:	RESISTENCIA A LOS PLAGUICIDAS
AGROVOC Term:	MALASIA PENINSULAR/ POBLACION ANIMAL
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14346

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