Overwintering of Erwinia carotovora subsp. carotovora in Diseased Tissues in Soil and Its Role as Inoculum for Soft Rot of Chinese Cabbage (Brassica campestris, Pekinensis Group)

2001 ◽  
Vol 67 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Jiro TOGASHI ◽  
Koushi UEDA ◽  
Tsuneo NAMAI
Keyword(s):  
Chinese Cabbage ◽  
Brassica Campestris ◽  
Erwinia Carotovora ◽  
Soft Rot

scholarly journals 001 Establishment of Methods in Evaluating the Susceptibility of Chinese Cabbage (Brassica campestris spp.) to Soft Rot Disease by Erwinia

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 440-441
Author(s):  
Won Jun ◽  
Soo-Seong Lee ◽  
Jongkee Kim
Keyword(s):  
Chinese Cabbage ◽  
Large Scale ◽  
Erwinia Carotovora ◽  
Soft Rot ◽  
Experimental Plant ◽  
Bacterial Soft Rot ◽  
Breeding Lines ◽  
Inoculation Methods ◽  
Soft Rot Disease ◽  
Rot Disease

Three inoculation methods, including cutting of a leaf, drenching, and point inoculation, were compared in an effort to screen the susceptibility of Chinese cabbage to soft rot disease caused by Erwinia carotovora subsp. carotovora. Three- to 4-week-old seedlings from 10 lines of cabbage with 16-h-old bacterial culture were routinely used. Inoculated seedlings were kept at 25.0 ± 10.0 °C for 48 h with saturated water vapor using a plastic tunnel in a greenhouse. Sixty-day-old mature plants were produced and inoculated in a greenhouse. Severity of symptoms, which were observed from percentage of plant infected was scored as from 1 to 9, representing resistant to susceptible, respectively. The correlation between seedlings and mature plants from ten lines was evaluated among the three different inoculation methods. Point inoculation gave the most significant correlation (r = 0.843, P < 0.05) between seedlings and mature plants. A good correlation was also observed between point inoculation of seedlings and drenching of mature plants (r = 0.609, P < 0.05). Cutting of a leaf of seedlings was also correlated with point inoculation of mature plants (r = 0.609, P < 0.05). This method provides the advantage of being able to keep the experimental plant alive, as only one leaf is detached. The point inoculation method is simple and relatively sensitive, so it could be used for large-scale screening for this bacterial soft rot disease. From three different evaluation assays, it was concluded that the breeding lines, C3-28, C3-29 from Cornell Univ. (Geneva, N.Y.) and the cultivar Kweonsim319 were relatively resistant to bacterial soft rot, while the Cornell breeding line CC-25 and the `Rang-no' cultivar were relatively susceptible.

scholarly journals Role of Erwinia carotovora subsp. carotovora Sprayed on Leaves of Chinese Cabbage as a Source of Inoculum for Soft Rot.

1998 ◽  
Vol 64 (6) ◽  
pp. 546-551
Author(s):  
S.M. Khorshed ALAM ◽  
Jiro TOGASHI ◽  
Tsuneo NAMAI ◽  
Koushi UEDA
Keyword(s):  
Chinese Cabbage ◽  
Erwinia Carotovora ◽  
Soft Rot

Biological Control of Soft Rot of Chinese Cabbage Using Single and Mixed Treatments of Bacteriocin-producing Avirulent Mutants of Erwinia carotovora subsp. carotovora

2000 ◽  
Vol 66 (3) ◽  
pp. 264-268 ◽  
Author(s):  
Ampaabeng Gyedu KYEREMEH ◽  
Toshio KIKUMOTO ◽  
Duen-yau CHUANG ◽  
Yuichi GUNJI ◽  
Yoshiyuki TAKAHARA ◽  
...  
Keyword(s):  
Biological Control ◽  
Chinese Cabbage ◽  
Erwinia Carotovora ◽  
Soft Rot

scholarly journals Response of Chinese Cabbage Cultivars to Petiole Spotting and Bacterial Soft Rot

2003 ◽  
Vol 13 (1) ◽  
pp. 190-195
Author(s):  
John Warner ◽  
Ray Cerkauskas ◽  
Tiequan Zhang ◽  
Xiuming Hao
Keyword(s):  
Chinese Cabbage ◽  
Sandy Loam ◽  
Block Design ◽  
Erwinia Carotovora ◽  
Soft Rot ◽  
Plant Size ◽  
Research Centre ◽  
Bacterial Soft Rot ◽  
Leaf Petiole ◽  
Loam Soil

Nine chinese cabbage (Brassica campestris ssp. pekinensis group var. cephalata) cultivars were evaluated for petiole spotting (gomasho) and bacterial soft rot (caused by Erwinia carotovora ssp. carotovora) in 1999 and fifteen in 2000 and 2001. The cultivars were arranged in a randomized complete block design in a Granby sandy loam soil with six replications in 1999 and three replications in 2000 and 2001, at the Greenhouse and Processing Crops Research Centre, Harrow, Ontario, Canada. Plants were harvested in the fall of each year during two harvest periods, one for early-maturing cultivars, and one for late-maturing cultivars. At harvest, the percent bacterial soft rot, percent marketable heads, plant size, uniformity of harvest maturity, and the mean head weight were determined for each cultivar. The number and weight of spotted leaves was determined by rating (0 to 5 scale) each leaf. Petiole spotting was also rated following storage at 2 °C (36 °F) and 89% ± 5% relative humidiyt for 3 to 4 weeks in 1999 and 2000. `Yuki', `Manoko', and `Summer Top' had lowest losses from bacterial soft rot while `Akala', `Ohken 75', `Spring Flavor', and `Yuki' had low levels of petiole spotting. Cold storage increased the incidence of the spotting disorder for most cultivars.

Effect of plant spacing and nitrogenous fertiliser on the yield and plant conformation of Chinese cabbage (Brassica campestris ssp. pekinensis)

1990 ◽  
Vol 30 (3) ◽  
pp. 437 ◽  
Author(s):  
TR Hill
Keyword(s):  
Experimental Design ◽  
Plant Height ◽  
Chinese Cabbage ◽  
Soil Type ◽  
Brassica Campestris ◽  
Sandy Loam ◽  
Soft Rot ◽  
Yield Potential ◽  
Plant Spacing ◽  
Marketable Yield

The effects of plant spacing and nitrogenous (N) fertiliser on the yield and plant conformation of Chinese cabbage were investigated for the michihili cultivar, Early Jade Pagoda, at Manjimup, Western Australia. The soil type was a sandy loam (7% gravel, pH 5.9) over clay at 60 cm. The experimental design included 4 plant spacings (25 by 25 cm, 30 by 30 cm, 35 by 35 cm, 40 by 40 em), and 6 rates of N fertiliser (0, 50, 100, 200, 300 and 400 kg N/ha). The highest marketable yields, 126.6 and 123.6 tha, were produced at the closest spacing, 25 by 25 cm, with N fertiliser rates of 200 and 300 kg/ha, respectively. Marketable yield for this spacing increased as N rate increased from 0 to 200 kg/ha, remained constant from 200 to 300 kg/ha and fell when the N rate was increased to 400 kg/ha. Soft rot damage was severe at the highest rate of N fertiliser and contributed to the reduced yield. The yield potential of Chinese cabbage was higher at close spacings than at the wider spacings. Plant height was not affected by any treatment, but plant width increased at the higher N fertiliser rates.

Fertility and Cytomorphology of Anthers in New Cytoplasmic Male-Sterile Lines of Chinese Cabbage(Brassica campestris L. ssp. pekinensis)

2012 ◽  
Vol 30 (1) ◽  
pp. 49
Author(s):  
Zhan SHI ◽  
Zheng-Jie WAN ◽  
Yue-Jin XU ◽  
Rui-Chang ZOU ◽  
Tao HUANG ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Brassica Campestris ◽  
Male Sterile ◽  
Cytoplasmic Male Sterile
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