Seasonal and daily activity patterns of Helopeltis theobromae Miller Hemiptera: Miridae and their implications in field control

Azhar Ismail, . (1986) Seasonal and daily activity patterns of Helopeltis theobromae Miller Hemiptera: Miridae and their implications in field control. [Proceedings Paper]

Seasonal activity pattern of Helopeltis theobromae was monitored in a cocoa plot at Malaysian Agriculture and Research Institute MARDI Hilir Perak Malaysia. Data on pest density pod numbers and rainfall were recorded. The results showed that the time of population build-up varied between years and the population trend seemed to be dictated by the weather and availability of cocoa pods as food source and breeding sites. Daily activity pattern of H. theobromae was studied in various cocoa-growing areas in the Peninsula. It was found that the daily activity increased as light intensity decreased and remained high throughout the night until the following morning. It was also observed that the increase in activity pattern of H. theobromae was also related to the increase in relative humidity and the decrease in diurnal temperature. In the development of H. theobromae management programme the seasonal population build-up cropping cycle or pod numbers and weather pattern should be incorporated as important decision making criteria. Insecticide applications during early evening or very early in the morning were suggested

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Abstract

Seasonal activity pattern of Helopeltis theobromae was monitored in a cocoa plot at Malaysian Agriculture and Research Institute MARDI Hilir Perak Malaysia. Data on pest density pod numbers and rainfall were recorded. The results showed that the time of population build-up varied between years and the population trend seemed to be dictated by the weather and availability of cocoa pods as food source and breeding sites. Daily activity pattern of H. theobromae was studied in various cocoa-growing areas in the Peninsula. It was found that the daily activity increased as light intensity decreased and remained high throughout the night until the following morning. It was also observed that the increase in activity pattern of H. theobromae was also related to the increase in relative humidity and the decrease in diurnal temperature. In the development of H. theobromae management programme the seasonal population build-up cropping cycle or pod numbers and weather pattern should be incorporated as important decision making criteria. Insecticide applications during early evening or very early in the morning were suggested

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB267 I61 1984 Call Number
AGROVOC Term:	Theobroma cacao
AGROVOC Term:	Helopeltis
AGROVOC Term:	Hemiptera
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14393

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