Establishment of economic threshold level in stored grains and preliminary trial on methacrifos as stack spray

Caliboso F. M ., . and Sabio G .C ., . and Benigno E . A ., . and Tiongson R . L ., . (1984) Establishment of economic threshold level in stored grains and preliminary trial on methacrifos as stack spray. In: Seminar on Health and Ecology in Grains Post-Harvest Technology, 21-24 Aug 1984, Kuala Lumpur (Malaysia).

A total of 23 species of insects and 13 species of mites were found in this studies. One species of insect and four species of mites are new records from the Philippines. The lesser grain borer Rhizopertha dominica (F) has gained primary importance in the safe storage of rice. It has attained dominance over Sitophilus spp. This new situation called for the modification of present pest control strategies and relevant warehouse management practices. The Economic Threshold Level was established at 5.17 months in rough rice and 2.94 months in corn. The Economic Injury Level (EIL) was attained after holding paddy for 7.6 months in storage. In corn the EIL was measured at 3.1 months in storage. Populations of R. dominica Sitophilus spp. Tribolium casteneum (Herbst) Oryzaephilus surinamensis (L.) and Cryptolestes spp. occured in all heights and grids of the stack penetrating even the core of the pile. Methacrifos generally showed higher efficiency in keeping significantly lower levels of insect populations

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Abstract

A total of 23 species of insects and 13 species of mites were found in this studies. One species of insect and four species of mites are new records from the Philippines. The lesser grain borer Rhizopertha dominica (F) has gained primary importance in the safe storage of rice. It has attained dominance over Sitophilus spp. This new situation called for the modification of present pest control strategies and relevant warehouse management practices. The Economic Threshold Level was established at 5.17 months in rough rice and 2.94 months in corn. The Economic Injury Level (EIL) was attained after holding paddy for 7.6 months in storage. In corn the EIL was measured at 3.1 months in storage. Populations of R. dominica Sitophilus spp. Tribolium casteneum (Herbst) Oryzaephilus surinamensis (L.) and Cryptolestes spp. occured in all heights and grids of the stack penetrating even the core of the pile. Methacrifos generally showed higher efficiency in keeping significantly lower levels of insect populations

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Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB189.73 A816 1984 Call Number
AGROVOC Term:	Grain
AGROVOC Term:	Fumigation
AGROVOC Term:	Stacking
AGROVOC Term:	Sprays
Geographical Term:	MALAYSIA
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:51
URI:	http://webagris.upm.edu.my/id/eprint/7376

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