Performance of Granular Herbicides for Transplanted Rice

水田粒狀除草劑之治草效果

張萬來(W. L. Chang)

《中華農業研究》 18卷4期 (1969/12) Pp. 11-18

https://doi.org/10.29951/JARC.196912.0002

摘要

嘉義農業試驗分所與國際稻米研究所合作於民國58年第1期作舉辦水田粒狀除草劑藥效試驗，茲將其結果摘要如下:
Nitroten粒劑+2,4D IPE粒劑之治草效果最佳Nitralin粒劑+2.4-D IPE粒劑次之。MCPA加一次人工除草，EPTC/MCPA粒劑，與Trifluralin/MCPA粒劑之治草效果亦佳，惟TCE-styrene與後期施用2,4-D及MCPA，其冶草效果則較差。2,4-D IPE粒劑，TCE-sty-rene/2,4-D IPE粒劑，與Propachlor/2,4-D IOE粒劑亦具相當程度之治草效果。
水稻藥害除Nitrofen粒劑+2,4-D IPE粒劑與2,4-D胺鹽處理較爲嚴重外，其餘均甚輕微，且多能在幼穗形成期以前復原，秈型稻臺中在來1號在生育初期較粳型稻嘉農242號易受藥害，惟前者復原情形較後者良好，故前者因藥害而減產之程度較後者輕微。
稻谷產量兩品種均以人工除草區者爲最高，第二與第三高產處理在臺中在來1號爲MCPA＋人工除草與EPTC/MCPA,，而在嘉農242號則爲Tritluralin/MCPA與TCE-styrene。產量最低之處理在臺中在來1號爲不除草區而在嘉農242號則爲2,4-D胺鹽處理。每株穗數與（或）每穗粒數之減少似爲稻谷產量低減之主要原因。

並列摘要

The results of a herbicide experiment for transplanted rice conducted at the Chiayi Agricultural Experiment Station in the first crop of 1969 are briefly summarized.
Nitrofen (G) +2,4-D IPE (G) gave the best control of weed followed by Nitralin (G) +2,4-D IPE (G). MCPA+HW, EPTC/MCPA (G), and Trifluralin/MCPA (G) also provided good control of weeds. TCE-styrene and late application of 2,4-D or MCPA resulted in a poor control of weeds. A satisfactory control of weeds was also obtained by 2,4-D IPE (G), TCE-styrene/2,4-D IPE (G), and Propachlor/2,4-D IOE (G).
Rice toxicity was generally light except the treatments of Nitrofen (G) +2,4-D IPE (G) and 2,4-D amine salt, and mot of rice injuries were recovered before panicle initiation stage. Taichung native 1, an ndica variety, was more sensitive to phytotoxicity in the early stage of rice growth than Chanung 242, a japonica one, but the former variety recovered more quickly and suffered less yield reduction than the latter one.
Hand weeding produced the highest grain yields followed by MCPA+HW and EPTC/MCPA (G) in Taichung native 1 and by Trifluralin/MCPA (G) and TCE-styrene in Chianung 242. The lowest yields were produced by untreated control in Taichung native 1 and by 2,4-D amine salt in Chianung 242. The decrease in grain yield was associated with the reduction of the number of panicles per hill and/or the number of grains per panicle.