Journal article
Resistance to ACCase-inhibiting herbicides in sprangletop (Leptochloa chinensis)
Weed Science, Vol.53(3), pp.290-295
2005
Abstract
This study reports evolved resistance to fenoxaprop-P in a population of sprangletop from a rice field in Thailand (BLC1). After eight applications of fenoxaprop-P, the herbicide appeared no longer effective. To confirm herbicide resistance in the BLC1 population, three experiments were conducted. First, glasshouse experiments revealed that the BLC1 population survived 600 g ai ha-1 of fenoxaprop-P without visual injury. Second, the BLC1 population was treated with fenoxaprop-P and other acetyl coenzyme A carboxylase (ACCase)-inhibiting herbicides (quizalofop-P, cyhalofopbutyl, and profoxydim) under field conditions; BLC1 exhibited resistance to all of these herbicides. Third, seeds of susceptible SLC1 and resistant BLC1 were germinated on 0.6% (v/v) agar across a range of herbicide concentrations. The resistant BLC1 population exhibited 61-, 44-, 9- and 8-fold resistance to fenoxaprop-P, cyhalofop, quizalofop-P, and profoxydim, respectively, compared with a susceptible SLC1 population. At the enzyme level, ACCase from the resistant BLC1 exhibited 30, 24, 11, 4, and 5 times resistance to fenoxaprop, cyhalofop-butyl, haloxyfop, clethodim, and cycloxydim, respectively. The spectrum of resistance at the whole plant level correlated well with resistance at the ACCase level. Hence, the mechanism of resistance to ACCase-inhibiting herbicides in this biotype of sprangletop is a herbicide-resistant ACCase. The specific mutation(s) of the ACCase gene that endows resistance in this population remains to be investigated.
Details
- Title
- Resistance to ACCase-inhibiting herbicides in sprangletop (Leptochloa chinensis)
- Authors/Creators
- C. Maneechote (Author/Creator)Somsak Samanwong (Author/Creator)X-Q Zhang (Author/Creator)S.B. Powles (Author/Creator)
- Publication Details
- Weed Science, Vol.53(3), pp.290-295
- Publisher
- Weed Science Society of America
- Identifiers
- 991005544562107891
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.275 Crop Protection
- 3.275.705 Herbicide Resistance
- Web Of Science research areas
- Agronomy
- Plant Sciences
- ESI research areas
- Agricultural Sciences