http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Kudsk, Kenneth A. (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
-
Effect of adjuvants on the rainfastness and performance of tribenuron-methyl on broad-leaved weeds
Pannacci, Euro,Mathiassen, Solvejg Kopp,Kudsk, Per The Korean Society of Weed Science and The Turfgra 2010 Weed Biology and Management Vol.10 No.2
The influence of a non-ionic surfactant (20% isodecyl alcohol ethoxylate plus 0.7% silicone surfactants), an anionic surfactant (25.5% alkylethersulfate sodium salt), and a vegetable oil (95% natural rapeseed oil with 5% compound emulsifiers) on the performance and rainfastness of a new commercial formulation of tribenuron-methyl was assessed on four broad-leaved weeds: wild mustard (Sinapis arvensis), scentless mayweed (Tripleurospermum inodorum), common poppy (Papaver rhoeas), and common lambsquarters (Chenopodium album). In one experiment, six doses of tribenuron-methyl alone or in a mixture with each of the three adjuvants were applied to each weed species at two different leaf stages. In another experiment, the plants of T. inodorum were sprayed and subsequently subjected to 3 mm of rain at 1, 2, and 4 h after treatment (HAT). The activity of tribenuron-methyl was significantly enhanced by all the adjuvants on all the weed species and only minor differences were observed among the tested adjuvants. The impact of the adjuvants varied among the weed species and growth stages.The highest response to the inclusion of adjuvants in the spray liquid was found at the late growth stage and on C. album, followed by P. rhoeas and T. inodorum, while S. arvensis was less responsive to the adjuvants. All the adjuvants significantly improved the rainfastness of tribenuron-methyl on T. inodorum, with differences among the adjuvants being more pronounced when rain occurred shortly after herbicide application. The effect of the vegetable oil on tribenuron-methyl's rainfastness was significantly lower than that of the surfactants with rain at 1 HAT, while no significant differences among the three adjuvants were observed when rain occurred at 2 and 4 HAT.
-
Hosseini, Seyed Ahmad,Mohassel, Mohammad Hasan Rashed,Spliid, Niels Henrik,Mathiassen, Solvejg Kopp,Kudsk, Per The Korean Society of Weed Science and The Turfgra 2011 Weed Biology and Management Vol.11 No.2
Wild barley (Hordeum spontaneum) is one of the most troublesome weed species in winter wheat (Triticum aestivum) in Iran. Two bioassay experiments were conducted in order to study the response of wild barley and wheat to different herbicides and to study the efficacy of pre-emergence (PRE), postemergence (POST), and PRE followed by POST applications of sulfosulfuron on wild barely. Moreover, the degradation of sulfosulfuron was studied by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS).The results showed that wild barley was highly tolerant to clodinafop-propargyl and its dry weight was reduced by only 15%, compared to the control, at the recommended dose (64 $g\;ai\;ha^{-1}$). Sulfosulfuron reduced the wild barley biomass by ${\leq}50%$ at the highest dose (90 $g\;ai\;ha^{-1}$) in the first bioassa but by not more than 20% and 12% at the recommended dose (22 $g\;ai\;ha^{-1}$) in the first and second bioassay, respectively. Significant differences were found among the application methods of sulfosulfuron, with the POST application being the least effective method. In contrast to the POST application, wild barley was severely injured by the PRE application of sulfosulfuron, with an $ED_{50}$ dose of 7.3 $g\;ai\;ha^{-1}$. The degradation study showed that wild barley can metabolize sulfosulfuron that is applied POST, but at a lower rate than wheat. By 4 h after application, wild barley had metabolized 26% of the sulfosulfuron, compared to 46% by wheat. In conclusion, wild barley can metabolize the recommended dose of sulfosulfuron that is applied POST; thus, the PRE application of sulfosulfuron or other integrated methods should be considered for the effective control of wild barley in wheat.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
