Package for padi angin weedy rice control in direct-seeded rice

Azmi M., . and Mohamad H., . and Abdullah M. Z, . (1999) Package for padi angin weedy rice control in direct-seeded rice. [Proceedings Paper]

Weedy rice locally known as padi angin has emerged as a very important economic weed in direct-seeded rice in Malaysia. In addition to its common characteristics as a weed easy shattering has been the most undesirable trait of padi angin. Padi angin is one of the most competitive weed in rice; densities of 35 reduce grain yield up to 50. Several morphological variants have been identified with respect to leaf colour plant type and grain characteristics. Field observation and diversity analysis using RAPD;s markers have provided information on the origin of padi angin in the affected areas. The cultural practices of dry direct seeding and volunteer seeding are suspected to be the most probable cause for the origin of padi angin in Malaysia. The inherent seed dormancy in some variants of padi angin makes control measures more difficult in double cropping rice areas. Padi angin infestation is very much dependent on its seed bank size where the larger its seed bank the more difficult to control. Therefore a holistic control measures has to be developed which stretches from varietal choice seed selection and thorough field preparation to crop field management. These activities include sequential tillage to optimise encourage good germination of padi angin seeds and follow up tillage to ensure complete kill of weeds. In addition manual weeding is normally carry out to rouge the surviving padi angin plants by pulling and cutting the panicle before it produces seed. Lastly to avoid the spread into new areas combined harvester should be cleaned after harvesting in padi angin infested fields before it can be used in non-infested fields.

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Abstract

Weedy rice locally known as padi angin has emerged as a very important economic weed in direct-seeded rice in Malaysia. In addition to its common characteristics as a weed easy shattering has been the most undesirable trait of padi angin. Padi angin is one of the most competitive weed in rice; densities of 35 reduce grain yield up to 50. Several morphological variants have been identified with respect to leaf colour plant type and grain characteristics. Field observation and diversity analysis using RAPD;s markers have provided information on the origin of padi angin in the affected areas. The cultural practices of dry direct seeding and volunteer seeding are suspected to be the most probable cause for the origin of padi angin in Malaysia. The inherent seed dormancy in some variants of padi angin makes control measures more difficult in double cropping rice areas. Padi angin infestation is very much dependent on its seed bank size where the larger its seed bank the more difficult to control. Therefore a holistic control measures has to be developed which stretches from varietal choice seed selection and thorough field preparation to crop field management. These activities include sequential tillage to optimise encourage good germination of padi angin seeds and follow up tillage to ensure complete kill of weeds. In addition manual weeding is normally carry out to rouge the surviving padi angin plants by pulling and cutting the panicle before it produces seed. Lastly to avoid the spread into new areas combined harvester should be cleaned after harvesting in padi angin infested fields before it can be used in non-infested fields.

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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:	Rice
AGROVOC Term:	Direct seeding
AGROVOC Term:	Grain
AGROVOC Term:	Crop management
AGROVOC Term:	Cropping systems
AGROVOC Term:	Harvesting
AGROVOC Term:	Infestation
AGROVOC Term:	Double cropping
AGROVOC Term:	Wild rice
AGROVOC Term:	PCR
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:14
URI:	http://webagris.upm.edu.my/id/eprint/12268

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