Effects of mixture of wood vinegar and sulfonylurea-based herbicides on the control of mixed weed flora and the yield of transplanted rice (Oryza sativa L.)

Issue Date

12-2007

Abstract

The effects of mixed treatments of wood vinegar (WV) and sulfonylurea-based herbicides on the weed control and the yield and yield components of transplanted rice were investigated. The herbicides tested were: pyrazosulfuron-ethyl+esprocarb [PSE; ethyl-5-[(4,6-dimethoxypyrimidin-2- ylcarbamoyl)sulfamoyl]-1-methylpyrazole-4-carboxylate+S-benzyl (RS)-1,2-dimethylpropyl (ethyl)thiocarbamate], pyrazosulfuron-ethyl+molinate [PSM; S-ethyl azepane-1-carbothioate] and pyrazosulfuron-ethyl+mefenacet [PSMF; 2-(1,3-benzothiazol-2-yloxy)-N-methylacetanilide]. Five treatments were used: 1 ) recommended (RH: 100%), 2) half-recommended (HRH: 50%), 3) HRH + 500 (1 mL wood vinegar 500 mL-1 water), 4) HRH + 1000 (1 mL wood vinegar 1000 mL-1 water) and 5) untreated control. Results showed that only PSM significantly increased the efficacy of HRH while PSE and PSMF already obtained high efficacy in HRH alone. Higher rice yield was obtained in the HRH plus wood vinegar treatments of PSM. On the other hand, a decrease in rice yield was observed in the HRH plus wood vinegar treatments of PSE and PSMF compared with the RH and HRH treatments. Data on yield components showed no significant variations in values among the treatments. No clear trend for grain appearance and nutritional quality was observed.

Source or Periodical Title

Philippine Agricultural Scientist, The (Formerly: The Philippine Agriculturist)

ISSN

0031-7454

Volume

90

Issue

4

Page

341-345

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Frequency

quarterly

Physical Description

tables; references

Language

English

Subject

herbicide, pyrazosulfuron, nutritional quality, rice, weed control, wood vinegar, yield

En – AGROVOC descriptors

ORYZA; RICE; VINEGAR; SULFONYLUREA HERBICIDES; WEED CONTROL; CROP YIELD; HERBICIDES

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