Screening of Herbicides for Weed Control in Jatropha curcas
| Autor: | Chieh–Chun Chen, 陳傑君 |
|---|---|
| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 Jatropha curcas is a multipurpose, stress resistant plant, potentially as a source of renewable energy, medicine and phytoremediation. In J. curcas cultivation, weed management is crucial. However, there are few studies on J. curcas tolerance on registered herbicides in Taiwan. The objective of this research is to screen the proper herbicides used in J. curcas fields at the period of pre-emergence and post-emergence of the cultivation. Nineteen herbicides registered for major crops were evaluated in germination of J. curcas seeds for the pre-emergence screen. The result shown that atrazine (1.60 kg ha-1), alachlor(2.50 kg ha-1), bentazon(1.50 kg ha-1), butachlor (1.50 kg ha-1), dinitramine (3.00 kg ha-1), diuron (2.00 kg ha-1), fluazifop-buty (0.25 kg ha-1), metribuzin (1.50 kg ha-1), pendimethalin (1.25 kg ha-1), glufosinate (1.60 kg ha-1) and glyphosate (2.50 kg ha-1) are suited for pre-emergence application. Twelve herbicides registered for major crops were evaluated for the post-emergence screening. The result showed that alachlor (1.25 kg ha-1), butachlor (1.50, 0.75 kg ha-1), pendimethalin (1.25, 0.63 kg ha-1), bentazon (1.20, 0.60 kg ha-1) and fluazifop-butyl (0.25, 0.13 kg ha-1) were safe to J. curcas at rates effective for weed control. In field test, combination of glyphosate (1.6 kg ha-1)＋ alachlor (1.4 kg ha-1)＋atrazine (1.6kg ha-1) was applied before planting. The results showed that the combination of glyphosate, alachlor and atrazine could provide acceptable weed control without damaging to J. curcas and maize. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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