Citation
A. Rahim Muda, . and Sulaiman Zulkifly, . (1999) Survey of resistance of stored grain pests to phosphine in Malaysia. [Proceedings Paper]
Abstract
Strains of major stored product insects collected in 1995 from various grain mills and warehouses throughout Peninsular Malaysia were tested for resistance to phosphine. The objectives of this study were to evaluate changes in resistance spectrum since the last survey 1991 and to verify the relation between storage management particularly phosphine application techniques to the development of resistance. Discriminating dose tests showed that the number of premises with one or more species detected resistance has increased to 64 33.3 in 1991. Resistance was recorded from nine six in 1991 of the ten states surveyed. Within species changes in the number of strains showing phosphine resistance in 1995 compared to 1991 were as follows: Rhyzopertha dominica 75 100 Sitophilus spp.O 7.5 Tribolium castaneum 44.4 19 and Oryzaephilus surinamensis 50 not monitored in 1991. Poor gastightness of storage structure and poor gas circulation during fumigation have probably contributed to selection pressure for resistance. With few exceptions resistance does not appear to be sufficiently high to cause control failures and proper fumigation of commodities infested with these resistant strains should provide complete control.
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Abstract
Strains of major stored product insects collected in 1995 from various grain mills and warehouses throughout Peninsular Malaysia were tested for resistance to phosphine. The objectives of this study were to evaluate changes in resistance spectrum since the last survey 1991 and to verify the relation between storage management particularly phosphine application techniques to the development of resistance. Discriminating dose tests showed that the number of premises with one or more species detected resistance has increased to 64 33.3 in 1991. Resistance was recorded from nine six in 1991 of the ten states surveyed. Within species changes in the number of strains showing phosphine resistance in 1995 compared to 1991 were as follows: Rhyzopertha dominica 75 100 Sitophilus spp.O 7.5 Tribolium castaneum 44.4 19 and Oryzaephilus surinamensis 50 not monitored in 1991. Poor gastightness of storage structure and poor gas circulation during fumigation have probably contributed to selection pressure for resistance. With few exceptions resistance does not appear to be sufficiently high to cause control failures and proper fumigation of commodities infested with these resistant strains should provide complete control.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. Call number mal SB 950 I61 1999 |
| AGROVOC Term: | Phosphine |
| AGROVOC Term: | Insects |
| AGROVOC Term: | Pests |
| AGROVOC Term: | Grain |
| AGROVOC Term: | Mills |
| AGROVOC Term: | Warehouses |
| AGROVOC Term: | Storage |
| AGROVOC Term: | Rhyzopertha dominica |
| AGROVOC Term: | Sitophilus |
| AGROVOC Term: | Tribolium castaneum |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:14 |
| URI: | http://webagris.upm.edu.my/id/eprint/12199 |
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