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Volume 29 (2000 - 200･･･
- Issue 2 Pages 115-
- Issue 1 Pages 5-
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Volume 29, Issue 2
Displaying 1-9 of 9 articles from this issue
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Mitsuru KANZAKI, Hiromi OISHI, Norio SHIRAKAWA, Hitoshi KURAMOCHI, Yas ...2001 Volume 29 Issue 2 Pages 115-120
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSThe herbicidal activity of cafenstrole (N, N-diethyl - 3 - mesitylsulfonyl - 1 H - 1, 2, 4 -triazole - 1 - carboxamide, Fig.1.) was evaluated for use as a new turf herbicide and the results were as follows:
1. Cafenstrole effectively controlled annual grassy weeds such as Digitaria ciliaris, Digitaria violascens, Setaria viridis and Poa annua at the dosage of 5 g a.i./a by pre-emergence application under upland conditions (Table 2, 3) . But when cafenstrole was applied post-emergence, herbicidal activities against Digitaria ciliaris and Poa annua were decreased (Fig. 2, 3) .
2. No phytotoxicity was observed even at the dosage of 200g a.i./a of cafenstrole by foliar application to Zoysia matrella and Zoysia japonica but slight phytotoxicity was observed on Agrostis stolonifera at the dosage of 20g a.i./a (Table 4) .
When cafenstrole was applied just after the transplanting of turf grasses, phytotoxicity of cafenstrole to Zoysia matrella and Zoysia japonica and growth inhibition of their roots were not observed (Table 5) .
The phytotoxicity of cafenstrole to Zoysia matrella and Zoysia japonica after four successive foliar applications was not observed (Table 6) .
3. Mobility of cafenstrole in soil was determined by a bioassay using a soil column. The movement of cafenstrole in the soil seemed to be very limited. It was assumed that most of the cafenstrole applied remained in the 1-2cm layer under the soil surface and the mobility of cafenstrole was less than that of simazine (Fig. 4) .
In conclusion, it was suggested that cafenstrole is a useful pre-emergence herbicide for the control of annual grassy weeds in Zoysia japonica and Zoysia matrella.View full abstractDownload PDF (590K) -
Bong-Ju PARK, Yoshito ASANO2001 Volume 29 Issue 2 Pages 121-128
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSThe objective of this study is investigate the effects of the mixture of cool-season and warm-season turfgrasses on weed control and wear tolerance in turf. While less weeds occurred in centipedegrass (Eremochloa ophiruroides (Munro.) Hack.) and St. Augustinegrass (Stenotaphrum secundatum (Walt.) Kuntze) monostands, weeds were generally much less in warm-season and coolseason turfgrass mixtures compared to in warm-season turfgrass monostands. During summer period, mixture plots with coolseason turfgrasses, kentucky bluegrass (Poa pratensis L.) or tall fescue (Festuca arundinacea Schreb. ), showed better tolerance to manually simulated traffic than control plot with only bermudagrass (Cynodon dactylon (L.) Pers.) . In winter treatment, the mixed-stands similary showed better wear tolerance. Soil bulk density increased in bermudagrass monostand but not in mixedstands with cool-season turfgrasses.View full abstractDownload PDF (5195K) -
Seijiro GOTO, Misako ITO2001 Volume 29 Issue 2 Pages 129-134
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSKillinga brevifolia var. leiolepis is a major perennial weed in turf, and its growth pattern is similar to that of manilagrass, the most popular trufgrass species in Japan. Competitiveness between both species was assessed by means of a replacement series experiment. They were planted in soil-filled containers at 5 different ratios of 16: 0, 12: 4, 8: 8:, 4: 12 and 0: 16, and grown for 4 months in the field conditions. The number of shoots, the number and length of rhizomes, and the dry weight of shoots, rhizomes and roots were measured. Relative yields (RY) and the relative yield totals (RYT) were calculated using the biomass data. Shapes of the biomass RY curves of both species in replacement series diagrams indicated the extreme aggressiveness of K. brevifolia against manilagrass (Fig.1), the trend being severer in rhizomes than in shoots. RYT values less than 1.0 obtained in the mixture plots suggested that allelopathic interaction might take part in this interference. Growth of individuai plants presented by the numbers of both aerial shoots and rhizomes were reduced in K. brevifolia but increased in manilagrass at the higher proportions of the own species (Tables 1 and 2) . Aggressivity of K. brevifolia became apparent when the rhizomes of each plant began invading to the territory of the other but before crowded with the aerial shoots (Figs. 2 and 3) .View full abstractDownload PDF (2759K) -
Hikaru AKAMINE, Yukio ISHIMINE, Hironobu OMOKAWA, Hitoshi KURAMOCHI2001 Volume 29 Issue 2 Pages 135-137
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSIt is known that mascarenegrass has a less cold resistant compare to Japanese lawngrass (Z. japonica) and manilagrass (Z. matrella) . The evergreen type of mascarenegrass (Z. tenuifolia) from Okinawa Pref. was selected in Utsunomiya University, Japan. Amino acids content in leaf of the mascarenegrass grown outdoor (selected type) in winter season were measered, and compared with that of the plant grown in greenhouse. It was found that proline content among several amino acids quantified was increased remarkably in selected type. From the circumstances of mascarenegrass grown in warm region in Japan, it seems that proline synthesis and accumulatoin abilities of this plant were acquired for low temperature stress as in the case of salt and dry tolerance function.View full abstractDownload PDF (2093K) -
NAMIL Pac, Masaru OGASAWARA, Koichi YONEYAMA, Yasutomo TAKEUCHI2001 Volume 29 Issue 2 Pages 138-141
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSExperiments were conducted to examine the physiological variation of Poa annua L. collected from 83 golf courses throughout Japan. Seed dormancy, light and low temperature requirements for seed germination were investigated. When 83 populations were divided into 5 groups (Kanto, Shizuoka, Kyushu, rough and fairway populations), no considerable differences among populations were observed for all measurements except the light requirement in Kyushu population. Furthermore, histogram and correlation analyses indicated that seed dormancy is more variable than the low temperature requirement within Poa annua L. populations and a positive relation exists between seed dormancy and the low temperature requirement.View full abstractDownload PDF (451K) -
[in Japanese]2001 Volume 29 Issue 2 Pages 142-144
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSDownload PDF (2092K) -
2001 Volume 29 Issue 2 Pages 145-146_2
Published: March 25, 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSDownload PDF (6379K) -
2001 Volume 29 Issue 2 Pages 159
Published: 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSDownload PDF (27K) -
2001 Volume 29 Issue 2 Pages 174
Published: 2001
Released on J-STAGE: June 08, 2010
JOURNAL FREE ACCESSDownload PDF (26K)
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