Pyrazole계(系)와 Chloroacetamide계(系) 제초제(除草劑)들의 혼합처리(混合處理)가 피(Echinochloa crusgalli)의 살초효과(殺草效果)에 미치는 상호작용(相互作用)

Interaction of Pyrazole - and Chloroacetamide Herbicide Combinations in Control of Echinochloa crusgalli

  • Kwon, Y.W. (Dept. of Agronomy, Seoul National University) ;
  • Seong, K.Y. (Dept. of Agronomy, Seoul National University) ;
  • Soh, C.H. (Dept. of Agronomy, Seoul National University)
  • 발행 : 1985.12.30

초록

Pyrazole계(系) 제초제(除草劑) pyrazolate, pyrazoxyfene 및 benzophenap과 Chloroacetamide계(系) 제초제(除草劑) butachlor 및 pretilachlor의 혼합처리시(混合處理時) 피에 대한 살포작용(殺草作用)에 있어서의 상호작용(相互作用)을 천판(千坂)의 등효과선법(等效果線法)과 Colby의 상호작용검정법(相互作用檢定法)으로 검정(檢定)해 본 결과(結果)는 다음과 같다. 1. Pyrazole계(系)의 10a당(當) 300g ai 수준(水準)에서의 피의 생육억제율(生育抑制率)은 pyrazolate 경우 1.5엽기(葉期) 피해 eoo 44%, pyraxoxyfene 경우 1.5엽기(葉期) 피에 대해 64%이었고, benzophenap의 피 초엽기에 60% 억제(抑制)할 뿐 1엽기(葉期) 이상(以上)에서는 억제(抑制)하지 못하였으며, chloroacetamide계(系)의 경우 butachlor는 150g ai/10a 수준(水準)에서, 그리고 pretilachlor는 20g ai/10a 수준(水準)에서 1.5엽기(葉期) 피를 99% 정도(程度) 억제(抑制)하였다. 2. Pyrazolate와 butachlor의 혼합처리(混合處理), pyrazoxyfene과 pretilachlor의 혼합처리(混合處理)는 피 1.5엽기(葉期) 또는 초엽기에 모두 상승적(相乘的) 상호작용(相互作用)을 보였는데 상호적(相互的) 상호작용(相互作用)은 정도(程度)는 pyrazolate/butachlor(공력작용지수(共力作用指數)=2.4) > pyrazoxyfene / pretilachlor(공력작용지수(共力作用指數) = 1.62) > benzophenap / butachlor(공력작용지수(共力作用指數)=1.52) 순위(順位)이었다. 3. Pyrazole계(系)와 Chloroacetamide계(系) 제초제(除草劑) 혼합처리(混合處理)에서 피의 생육(生育) 90% 억제등효과선상(抑制等效果線上) 최고(最高)의 공역효과(共力效果)가 나타난 약량수준(藥量水準) 및 약량비율(藥量比率)은 pyrazolate/butachlor 혼합(混合)의 경우 187g/14g ai/10a (1:0.075)이었고, pyrazoxyfene/pretilachlor 조합(組合)의 경우 330g/3.3g ai / 10a(1:0.01)이었으며, benzophenap/butachlor의 경우 335g/52g/ ai/10a(1:0.15)이었다.

Three pyrazole-herbicides, pyrazolate, pyrazoxyfene and benzophenap, were evaluated for their interaction in controlling barnyardgrass (Echinochloa crusgalli) with two chloroacetamide-herbicides, butachlor and pretilachlor. Percent inhibition of barnyardgrass growth by pyrazolate, pyrazoxyfene, and benzophenap was 44%, 64%, and 0%, respectively, when each was applied at the 1.5 leaf-stage of barnyardgrass at a rate of 3㎏ ai per ㏊ as single treatment, and the benzophenap showed 60% inhibition when it was applied at the coleoptile stage. While the lowest rate controlling the 1.5 leaf-stage barnyardgrasses by 98 to 100% of the butachlor and pretilachlor was 1.5㎏ and 200g per ㏊, respectively. All of the combinations of pyrazolate with butachlor, pyrazoxyfene with pretilachlor, and benzophenap with butachlor have shown synergistic interaction in controlling barnyardgrass on the Chisaka's isobole of 90% growth inhibition as well as on the Colby`s interaction efficacy data; synergism indices were 2.44, 1.62 and 1.52 in order. The dose combinations shown the maximal synergism were 1870g of pyrazolate with 140g of butachlor (1:0.075), 33008 of pyrazoxyfene with 338 of pretilachlor (1:0.01), and 3350g of benzophenap with 520g of butachlor (1:0.15) on the ai/㏊ basis.

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