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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Weed Science
Journal Basic Information
Journal DOI :
The Korean Society of Weed Science
Editor in Chief :
Volume & Issues
Volume 10, Issue 4 - Dec 1990
Volume 10, Issue 3 - Sep 1990
Volume 10, Issue 2 - Jun 1990
Selecting the target year
Floristic Composition and Community Dynamics Along the Nakdong River
Kim, K.U. ; Kwon, S.T. ; Back, K.W. ; Kim, J.H. ; Kim, H.Y. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 67~74
Weed species investigated along the Nakdong River on September, 1989 were 105 species in 29 families. Vegetation analysis along the Nakdong River using a two dimensional ordination diagram showed the existence of six plant community types, namely, Humulus japonicum, Persicaria thunbergii, Artemisia capillaris, Persicaria blumei-Setaria viridis-Digitaria sanguinalis and Phragmites communis. Especially the largest community type, Phragmites communis had dominant weed species such as Humulus japonocum, Arundinella hirta, Persicaria thunbergii, Setaria viridis, Sasola collina and Persicaria perfoliata.
Weed Vegetation Analysis by Two Dimensional Ordination Analysis Along the Waterway of Kyungnam and Kyungpook Provinces
Kim, K.U. ; Kwon, S.T. ; K.W., Back ; H.Y., Kim ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 75~82
Weed species investigated along the waterway of Kyungnam and Kyungpook provinces on September, 1989 were 88 species in 33 families and 96 species in 33 families, respectively. Three weed community types were observed along the waterway of Kyungnam province, namely, Echiuochoa cars-galli, Persicaria hydropiper and Persicaria thunbergii, and five community types such as Humulus japonicus-bideus froudosa, Solanum nigrum, Persicaria thunbergii-Humulus japonicus, Humulus japonicus and Persicaria thunbergii were detected along the waterway of Kyungpook province. The most dominant weed species indentified along the waterways in both Kyungnam and Kyungpook provinces were Pensicaria tlrutrheagii and Persicaria hydropiper which are the aquatic weed species.
Effects of Weed Amounts Emerged at Different Developmental Stage on Rice Yield
Kim, K.S. ; An, M.H. ; Chang, J.S. ; Huh, B.L. ; Kim, D.R. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 83~92
Experiment was conducted to establish the weed control system on the paddy fields by investigating species, period and amount of weeds in Gangwon province. Four locations were selected for these experiments : West plain area, Chunchon(74m above the sea level), mid-mountainous area, Hongchon(300 m), high alpine area, Hoengsong(450m), and east sea area, Myungju(14m). Weed emergence was investigated 6 times from 10 days after transplanting to 60 days with 10 days interval. From the experiments stated above, the results were summarized as follows ; The identity of weed species was small in grass family, but broad-leaf family was numerous. Also the dominant weed species was generally the perenial weeds. The weed emergence was initiated from 10 days after translanting. The amounts of weed counted the most in Chunchon. A large number of weeds were emerged between 30-60 days after transplanting in Chunchon and between 40-60 days after transplanting in Hongchon and Hoengsong. Among agronomic characteristics affected by weed emergence during rice development, plant height was decreased by 2~4cm, panicle number by 1.3~2.9, spikelet by 3.7~7.5, ripening rates 3.3~6.5%, and milled yield by 12~17%, respectively.
Interspecific Competition Between Echinochloa colona and Rice
Chun, J.C. ; Moody, K. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 93~98
Interspecific competition between E. colona and rice was determined over four growth stages in replacement series. No competition between the two species as measured by plant height, leaf area and dry weight occurred by 30 days after seeding (DAS) at all the density combinations studied. At 45 DAS reductions in leaf area and dry weight of E. colons due to the competition occurred at the density combinations where number of competing E. colons plant was less than that of rice. However, there was a great increase in leaf area and dry weight of E. colons at the density combination of one E. colons competing with four rice plants at 60 DAS. As the number of E. colons plants increased, the leaf area and dry weight of E. colona decreased resulting from intraspecific competition between E. colons plants. Although rice absorbed more nitrogen than E. colons up to 30 DAS, the reverse was observed from 45 DAS. A relatively small amount of phosphorous was absorbed by both rice and E. colons, but the amount of phosphorous taken up by E. colons was greater than that taken up by rice. E. colons absorbed extremely high amount of potassium when compared to rice.
Triazine Herbicide Treatment and Survival Rate of Pearl Millet Seedlings
Choi, B.H. ; Park, K.Y. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 99~102
Pearl millet (Pennisetum americanum (L.) Leeke) has been found as a promising new forage crop of higher quality and yield in Korea since 1985. The objective of the study was to select preemergence herbicides for weed control in growing pearl millet in order to reduce production cost and with increased yields. Propazine (Milogard 4L) was the best in controlling weeds without its phytotoxicity at the standard application rate, and with the highest survival rate of seedlings of peal millet "Suwon 1" hybrid. Sprayings with Atrazine and Simazine caused lower survival rate of peal millet and with their light phytotoxicity as compared with manual weeding and Propazine spraying. Alachlor killed pearl millet seedlings almost completely. Pendimethalin also was not good for weed control of peal millet due to its severe phytotoxicity and with very low survival rate of pearl millet seedlings.
Selective Mode of Action of Naproanilide in Rice and Paddy Weeds- I. Selectivity of Naproanilide between Rice and Paddy Weeds
Choi, J.M. ; Pyon, J.Y. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 103~108
Germination test, nutrient culture test and pot experiment were conducted to determine selectivity of naproanilide between rice plants and paddy weeds. Naproanilide more severely inhibited growth of Scirpus juncoides, Sagittaria pygmaea and Cyerus serotinus than that of rice plant and Echinochloa crus-galli at germination stage. Root growth was severely inhibited than that of shoot growth by naproanilide treatment. Naproanilide severely inhibited rice plant and Echinochloa crus-galli at 30 uM, Sagittaria pygmaea at 1 uM and Cyperus serotinus at 10 uM in nutrient culture test, Rice plant and Echinochloa crus-galli did not show the difference of tillers and dry weight, but Scirpus juncoides, Morzochoria vaginalis and Aneilema keisak were severely inhibited at 15g/a and Sagittaria pygmaea and Cyperus serotinus at 30g/a in pot trial.
Selective Mode of Action of Naproanilide in Rice and Paddy Weeds- II. Uptake and Translocation of Naproanilide in Rice and Paddy Weeds
Choi, J.M. ; Pyon, J.Y. ; Kim, Y.W. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 109~113
In order to determine selective mode of action of naproanilide between rice and paddy weeds, absorption and translocation of
-naproanilide in rice, Echinochloa crus galli, Cyperus serotinus, and Sagittaria pygmaea were studied, Rice plant and Echinochloa crus-galli absorbed less amount of
-naproanilide than Sagittaria pygmaeo and Cyperus serotinus. Less amount of
-naproanilide was translocated into shoots and translocation rate was slower in rice and Ecl:inochloa crzis-galli than that of Sagittaria pygmaea and Cyperars serotinus. Also, 30-40% of
-naproanilide was distributed at tubers of Sagittaria pygmaea and Cyperus serotinus, which explained that higher amount of
-naproanilide was absorbed from tubers.
-naproanilide was gradually decreased in all plant species and finally more radioactivity was determined in Sagittaria pygmaea and Cyperus serotinus than in Echinochloa cars-galli and rice plant after
-naproanilide treated plants were transferred to Kasugai solution.
Controlled Release of 2,4-D(2,4-Dichlorophenoxy Acetic Acid ) from the Complex of Rice Husk Lignin and 2,4-D-IV. Variation of Herbicidal Activity by Soil Environmental Factors
Guh, J.O. ; Lee, D.J. ; Lim, K.P. ; Kwon, S.L. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 114~121
Inactivation in soil absorption, translocation of 2, 4-D by plants vary depending upon soil environments and herbicide formulations. Experiment was conducted in a glasshouse using rectangular pots(
) to evaluate the growth responses of barnyardgrass (Echinochloa crus-galli) and Indian jointvetch (Aesehyrcomene indica) to two formulations of 2, 4-D. The formulations used were 40% 2, 4-D amin salt (2, 4-D/AS) and 19.7% complex of rice husk lignin and 2, 4-D (2, 4-D/LG) which were applied at 200g ai/ha. Soil environments included fertilizer levels, soil pH, organic matter contents, and soil textures, Each treatment was replicated three times. The herbicidal activity of 2.4-D increased and lasted with increased levels of fertilizer. The activity also increased and lasted with low soil pH and decreased content of organic matter. Generally 2, 4-D/LG showed higher and longer herbicidal activity than 2. 4-D/AS for both test plants under all conditions applied. However, the herbicidal activity was influenced by the formulations more than by soil textures. It was thought that 2, 4-D/AS was released in a short time and inactivated readily while 2, 4-D/LG was slowly released and gave an opportunity of absorption by plants for a long period.
Release Profile of
C-Butachlor from Controlled Release Formulation Prepared with Alginate-Kaoline Matrix
Oh, Byung-Youl ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 122~129
-butachlot[N-(butoxymethyl)-2-chloro-2', 6'-diethylacetanilide] labelled uniformly in benzene ring was incorporated in alginate-based granules to get controlled release properties. The influence of kaoline addition on the formulation characteristics and release profiles were evaluated under a closed dark and an opened sunlight condition. Incorporation efficiency of
-butachlor in alginate-kaoline matrices was over 91.8%. Formulation yield was decreased with increase of kaoline concentration. The release rate from all the granules prepared with alginate was slower than that from the commercial granule impregnated in zeolite. The release rate from the granule containing kaoline was decreased as the kaoline content was increased under both conditions. Losses of butachlor from the leacheate solution of the alginate-kaoline matrices under an opened sunlight condition was diminished by increasing the kaoline content.
Case Study of Civil Service Consultation on Herbicides
Kim, I.S. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 133~137
Crop Injury and Efficacy Evaluation of Herbicides
Kim, K.U. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 138~144
Extension Service in Weed and Herbicide Technology
Lee, S.S. ; Chun, T.H. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 145~147
Training Program Service in Weed Technology
Seo, K.H. ; Lee, C.K. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 148~152
Weed Control in Minor Crops and Minor Use Herbicides
Guh, J.O. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 153~158
Integrated Improvement of Weed Control System in Korea
Kwon, Y.W. ; Guh, J.O. ;
Korean Journal of Weed Science, volume 10, issue 2, 1990, Pages 159~162