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[in Japanese]
1966 Volume 12 Pages
1-3
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Masakazu SHIGA
1966 Volume 12 Pages
3-6
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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The species composition, spatial distribution and phenology of spiders in a rape field were studied in Fukuoka City.
1) The species which occurred in the rape field were similar to those found in paddy fields.
2) The spiders observed were divided into three groups by the difference of their habitat. On lower leaves or on the ground……Oedothorax insecticeps, Gnathorarium dentatum, Enoplognatha japonica
On middle leaves…………………………Theridion octomaculatum, Tetragnatha sp.
On upper portions or flowers………Misumenops tricuspidatus
Two species which inhabit different parts of the plant could coexist on the same plant and in the same observed point. Therefore it seems that between these two species competitive relationship may not exist.
3) It was often observed that these spiders attacked the green peach aphid. However, the increase of aphid population is too fast to be controlled by the spiders in early summer. On the contrary the increase of aphid population is very slow in winter. Therefore it is worth trying to investigate the effectiveness of spiders as predators.
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[in Japanese]
1966 Volume 12 Pages
6-9
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
9-13
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
13-15
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
15-17
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
17-19
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
20-21
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
21-25
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
25-27
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
27-30
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
31-32
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
33-35
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
35-38
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Takeo TSUBOI, Tadahiko INOUE, Kazunobu KONDO
1966 Volume 12 Pages
38-41
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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1) Joint toxicological studies of Kitazin, 0, 0-diethyl-S-benzyl-thiophosphate(EBP), which is a new fungicide for rice blast, were conducted in combination with Sumithion, 0, 0-dimethyl-O-(3-methyl-4-nitrophenyl) thiophosphate(MEP), for the small brown planthopper (Laodelphax striatellus FALLÉN), the brown planthopper (Nilaparvata lugens STÅL), and the green rice leafhopper (Nepho-tettix cincticeps UHLER) by the leaf-dipping method in laboratory.
2) From statistical analysis of dose-probit regression lines, the mixture of Kitazin and Sumithion at a ratio of 1:1 in active ingredients shows synergistic action for any of all insects tested.
3) Depending upon the hypothesis of similar joint toxic action between the two chemicals, the toxicity of mixture for L. striatellus, N. lugens, and N. cincticeps were 2.84, 4.47, and 6.36 times higher respectively than those which calculated from the toxicity of component separately.
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
42-44
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
44-46
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
46-48
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Hirata INOUE, Tadatora OKADA
1966 Volume 12 Pages
48-51
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Experiments were carried out to find simplified diets for obtaining the 4th and 5th instar larvae of the rice stem borer under aceptic condition. Two kinds of diet were made and tested. The first was composed of one part of wheat bran and about three parts of water in weight. In the second, ascorbic acid of 1 to 10 mg per gram of wheat bran was added. These were autoclaved in flask. Larvae grew well and pupated normally on both diets under aceptic condition but some individuals failed to emerge. Hatching potency of egg masses laid by females reared on these diets was not entirely satisfactory, but some ones hatched normally. Egg masses laid by females reared on the diet supplemented with ascorbic acid showed higher hatchability than those laid by females reared on the first diet.
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
51-52
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
52-54
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
54-58
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
58-60
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
60-62
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
1966 Volume 12 Pages
62-64
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
64-66
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
66-68
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
68-70
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
71-74
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
74-76
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
77-79
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
79-81
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
81-83
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
83-85
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
85-87
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
87-90
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
90-92
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
92-95
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Hisashi YOSHIOKA
1966 Volume 12 Pages
95-97
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
97-100
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
100-102
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
102-105
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
105-107
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Toshikatsu NISHINO
1966 Volume 12 Pages
108-112
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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It is well known that the young and tender leaves of orange trees are more susceptibly infested by citrus canker (caused by Xanthomonus citri (Hasse) Dowson) than old and hard ones. In this paper, the author wishes to show the most susceptible stage of young leaves on this disease and the time of control by means of fungicides in relation to leaf ages.
At first, stomatal inoculation tests were made upon various ages of young leaves of orange trees in order to distinguish the most susceptible age of leaves.
The developmental stage of young leaves was classified in four grades as follows; age No.1, leaf length<1.5cm, age No.2, leaf length 1.5cm-3.0cm, age No.3, leaf length>3.0cm and the leaf is still soft and juicy, age No.4, the leaf is beginning to harden.
The stomatal inoculation test showed that the leaf age No.2 and No.3 were most susceptible.
Next, the most effective time and the number of times of fungicides spraying for the control of citrus canker were examined during the period of young leaves in summer.
These experiments were designed as once, twice and three times of spraying during the period of leaf growth, and once and twice of spraying were arranged each ages of young leaves respectively.
These experiments showed that the most effective control took place in the three times of spraying which ranged all ages of leaves. In the experiments on twice of spraying, more effective control took place by the spraying in age No.3 and No.4 than the others. It seems that the most effective time of control for citrus canker during the growth of leaves may be the leaf age No.3 and No.4.
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[in Japanese], [in Japanese]
1966 Volume 12 Pages
112-114
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
114-115
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese]
1966 Volume 12 Pages
115-117
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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Ryoh-ichi OHGUSHI, Takahiko OHTA, Toshikatsu NISHINO, Tsuyuji HIRANO
1966 Volume 12 Pages
117-119
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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White root rot (caused by Rosellinia necatrix) is one of the most injurious diseases of loquat orchard in Nagasaki Prefecture. About 20 per-cent of loquat trees are infested by this pest.
Since 1963, field observations on the infestation of this disease and the environmental conditions about it had been carried out by authors. As the results of this study, it was recognized that the heavy infestation was seen at the orchard of older trees or trees which were weak. The relationship between the infestation of loquat canker and the infestation of white root rot was observed in some orchards. In some orchards, it seemed that the destructive effect of typhoon at 1956 brought about the infestation of root rot.
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
119-121
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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[in Japanese], [in Japanese], [in Japanese]
1966 Volume 12 Pages
121-123
Published: November 20, 1966
Released on J-STAGE: May 22, 2009
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