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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
1-4
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
4-7
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
7-10
Published: December 15, 1969
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Takao GOTO, Tadahiro NISHIZAWA
1969 Volume 15 Pages
10-12
Published: December 15, 1969
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This paper deals with the results of the experiment to examine the inhibitory effects of three bacteriocides on lesion enlargement of rice plants inoculated with Xanthomonas oryzae.
The plants were grown in wooden frames (60×360×20cm) and were inoculated by spraying the bacterial suspension (about 5×10
8/ml) at a rate of 80 ml per m
2 for five times during the period from the most active tillering stage to young-panicle formation stage.
Fentiazon wettable powder (3-benzylideneamino-4-phenyl-thiazoline-2-thione 50%) at a 1, 000 ppm, organic nickel wettable powder (nickel-dimethylthiocarbamate 65%) at a 1, 625 ppm and dihydro-streptomycin sulphate at a 500 ppm were effective by twice spraying 12, 17 days after inoculations. Spraying of the former two increased the yields by 23.0-28.7%, while the third one did not increase though lesion enlargement was inhibited.
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
12-14
Published: December 15, 1969
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[in Japanese]
1969 Volume 15 Pages
14-15
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
15-16
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
17-18
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
18-20
Published: December 15, 1969
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[in Japanese]
1969 Volume 15 Pages
20-22
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
22-24
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
24-25
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
26-28
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
28-30
Published: December 15, 1969
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[in Japanese]
1969 Volume 15 Pages
30-34
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
34-37
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
37-40
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
1969 Volume 15 Pages
40-43
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
43-44
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
44-46
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
46-49
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
49-51
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
51-52
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
53-54
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
54-56
Published: December 15, 1969
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Takahiko OHTA
1969 Volume 15 Pages
57-59
Published: December 15, 1969
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Degree of infection with citrus canker (Xanthomonas citri (Hasse) Dowson) varies according to the aging of leaf and fruit.
This experiment was carried out for determine the sensitive period of spring leaves and fruits. In the spring leaves, various ages of young leaves of some citrus species, Fukuhara, Natsudaidai and Satsuma oranges, were inoculated through stomata with bacterial suspension containning 10
8 cells per ml. While the age distribution and its successional changes was investigated every 5 days during the growing period of spring leaves. And the period of stomatal infection was determined by the results of the stomatal inoculation test and the distribution of leaves ages.
In the fruits, using Satsuma orange fruits, stomatal and wound inoculation was made every weeks with bacterial inocula containing 10
8 cells per ml from the beginning of June to the middle of September.
With stomatal inoculation, the spring leaves of all tested species, were sensitive while middle aged leaves were many, from 10 to 50 days (the most sensitive period, from 20 to 40 days) after the orange buds were out.
In the fruits of Satsuma orange, stomatal infection was caused from the beginning of June to the middle of August. The most sensitive period was July. Wound infection was caused during the middle of June to the end of August. The most sensitive period was during the middle of June to the middle of July.
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Tadayuki IWASA, Takahiko OHTA, Akra MORITA
1969 Volume 15 Pages
59-61
Published: December 15, 1969
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Adequate time of spraying of streptomycin for the control of citrus canker on fruits was studied.
Since the late of May to the biginning of September, the spray was carried out as shown in Table 1.
It was observed that the effective control was resulted by the spraying in June and July, especially, the spraying in July was most effective.
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
61-62
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
62-65
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
65-68
Published: December 15, 1969
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[in Japanese]
1969 Volume 15 Pages
68-71
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
72-74
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
1969 Volume 15 Pages
74-75
Published: December 15, 1969
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[in Japanese]
1969 Volume 15 Pages
76-81
Published: December 15, 1969
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[in Japanese]
1969 Volume 15 Pages
81-83
Published: December 15, 1969
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Takahiko OHTA, Akira MORITA
1969 Volume 15 Pages
83-86
Published: December 15, 1969
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In the factor affected to the residual effect of agricultural chemicals, the flowing down by rain is an important one. So, in this experiment, the authors examined the residual effect of some fungicide under the conditions of artifical or natural rain.
In the test of effect of inhibition to germination of spore of citrus melanose by rain drops containing fungicides, the rate of germination increased quickly in the plots of Dithane, but in the plots of Deran the rate of germination increased slowly.
The mist spray and common spray to residual effect were compared, mist spray that is lower dilution, showed the higher inhibition to germination than common spray, even the same active ingredient. This result were seen in both Deran and Difolatan.
The result of inoculation test at the natural rain, Deren and Dithane have shown similar te-ndencies in the case of a little rain. Therefore, rainfall and residual effect seemed to correlate closely. But in the case of a heavy rainfall or rain which falls immediately after spray, the residual effect with Deran and Dithane decreased remarkably, especially in Dithane.
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
86-87
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
88-89
Published: December 15, 1969
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Ryoiti KISIMOTO
1969 Volume 15 Pages
90-91
Published: December 15, 1969
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From 103 stations in various area in Kyushu, the small brown planthopper of the first generation, adults and larvae of the 4 th and 5 th instar, were collected. Infectivity was tested individually by hemagglutination.
In southern Kyushu, Kagoshima and Miyazaki Pref., where the virus disease occurs slightly, the percentages were mostly lower than 2 to 3%. In northern Kyushu, Fukuoka, Nagasaki and Oita Pref., the percentages were higher than 5%, where the occurrence of the disease was economically important.
Percentage of infected hills in each station was surveyed in the late August. Correlation between the percentage of infective planthoppers and of infected hills was shown in Fig. 1. Percentage of infective planthopper in the stations where infected hills were over 10%, an economic loss level, exceeded 5.5%. These areas were considered to be virus-prevailing areas.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
91-93
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
93-95
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
95-97
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
97-102
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
103-104
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
105-107
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
107-109
Published: December 15, 1969
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[in Japanese], [in Japanese]
1969 Volume 15 Pages
110-112
Published: December 15, 1969
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STÅL Toru NAGATA, Shigeo MORIYA
1969 Volume 15 Pages
113-115
Published: December 15, 1969
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Susceptibility of the brown planthopper to γ-BHC, collected from several areas of Kyushu district in 1967-8, was investigated by topical application method.
The hoppers collected at a point of Saga prefecture, where difficulties in field control with BHC dusts were reported in 1967, showed the highest tolerance to γ-BHC among planthoppers tested, suggesting that control failures were mainly attributable to the development of resistance.
Laboratory selection by topical dosing with γ-BHC increased the resistance 7 times in 5 generations, but cross resistance to DDT, carbaryl and fenitrothion was not observed. The LD
50 of the selected strain to γ-BHC was approximately 20-fold higher than that of the most susceptible field strain.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
115-118
Published: December 15, 1969
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[in Japanese], [in Japanese], [in Japanese]
1969 Volume 15 Pages
118-121
Published: December 15, 1969
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