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Kei OGAWA
1996 Volume 1996 Issue 47 Pages
1-2
Published: November 30, 1996
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Keiji OHTA, Takehiko FUJIMURA, Masatoshi MATSUDA, Miharu KINOTA
1996 Volume 1996 Issue 47 Pages
3-7
Published: November 30, 1996
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Katsuhiko CHIBA, Tomoyuki TOMINAGA, Fukuichi URAKAWA
1996 Volume 1996 Issue 47 Pages
8-10
Published: November 30, 1996
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Shin-ichi TAKEDA
1996 Volume 1996 Issue 47 Pages
11-14
Published: November 30, 1996
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Hideki FUKUDA, Akira SAYAMA, Ryosuke TSURUTA
1996 Volume 1996 Issue 47 Pages
15-18
Published: November 30, 1996
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1. Experimental Production of Dew Formation Recorder
Masahito MATSUHASHI, Kunihiro OKUHARA
1996 Volume 1996 Issue 47 Pages
19-22
Published: November 30, 1996
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Hideaki TSUJI, Makiko SUTO, Ryoso HONKURA
1996 Volume 1996 Issue 47 Pages
23-26
Published: November 30, 1996
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Shigeru OSADA
1996 Volume 1996 Issue 47 Pages
27-30
Published: November 30, 1996
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Hideo ABE, Jun SOUMA, Akira YANAGISAWA, Kesaharu YOSHIMI, Motomi MUKOU ...
1996 Volume 1996 Issue 47 Pages
31-33
Published: November 30, 1996
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2. The Symptoms and Damage
Hidenori TORIKURA
1996 Volume 1996 Issue 47 Pages
34-38
Published: November 30, 1996
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“Kasuri-ha” syndrome of winter wheat was characterized by many thin yellowstreaks of flag-leaf and its sheath. It was observed from the flowering stage to the ripening stage, and was frequently accompanied with brown head and stalk. The wheat with those symptoms was lower in height, and those grains thicker than 2.2mm were fewer and lighter than the healthy ones. The number and the weight of those good grain was reduced to 70% of the healthy ones respectively, and the total damage caused by the syndrome was calculated to be about 50%.
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Ryoso HONKURA, Shigeru OSADA, Chieko TAKAHASHI
1996 Volume 1996 Issue 47 Pages
39-41
Published: November 30, 1996
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Chieko TAKAHASHI, Akemi KIKUTA, Kazuhide ONODERA
1996 Volume 1996 Issue 47 Pages
42-44
Published: November 30, 1996
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Koya SUGAWARA, Yoshiko ANDO, Takashi NAKAJIMA, Kiroku KOBAYASHI, Akira ...
1996 Volume 1996 Issue 47 Pages
45-47
Published: November 30, 1996
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Fifteen soybean cultivars were tested for the resistance to
Phialophora gregata f. sp.
sojae and reaction to gregatin A. In the plants treated with gregatin A (0, 6.25, 12.5 and 25ppm), internal stem browning similar to the symptom of
P. gregata infection was observed. The differences in cultivars, concentrations of gregation A, and their interaction had significant effect on the progress of stem browning. However, there was no relationships between resistance to
P. gregata and reaction to gregation A.
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Ken-ichiro HONDA, Seiji KANEMATSU, Yoshiro MIKOSHIBA, Shunichi MIYAI
1996 Volume 1996 Issue 47 Pages
48-51
Published: November 30, 1996
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Occurrence of two strains of soybean dwarf virus (SDV-YS and SDV-YP), which are transmitted by
Aulacorthum solani and
Acyrthosiphon pisum respectively, was confirmed in soybean fields in Morioka City by aphid transmission experiments and triple-antibody sandwich enzyme-linked immunosorbent assays (TAS-ELISA) using monoclonal antibodies, in 1993 to 1995. By TAS-ELISA it was shown that 61.7 to 92.5% of diseased plants were infected with SDV-YP and 2.5 to 30.0% were infected with SDV-YS. Double infection of two strains was observed on up to 1.7% of diseased plants. Neither SDV-YS nor SDV-YP could be detected from 5.0 to 10.0% of diseased plants showing typical symptoms induced by SDV infection. These plants were supposedly infected with new strains of SDV not described yet.
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Makoto TAKAKUWA
1996 Volume 1996 Issue 47 Pages
52-54
Published: November 30, 1996
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Cercospora leaf spot of Sugar Beet is one of important diseases in Hokkaido. Analitical studies on its occurrence at 3 locations in twenty-five years from 1970 to 1995 were carried out. The sequence of the disease varied with year and location. The degrees of disease incidence in recent 5 years were generally low. The correlation between disease incidence and temperature was not significantly observed. However, the influence of humidity was suggested. The fungicides dramatically changed in kind. The new fungicides belonging to DMI showed the excellent protective ability.
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Ken OIKAWA, Shigemitu ARAI
1996 Volume 1996 Issue 47 Pages
55-58
Published: November 30, 1996
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Takashi SHIRAKAWA, Manabu HOSAKA, Seizo HORIUCHI
1996 Volume 1996 Issue 47 Pages
59-61
Published: November 30, 1996
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A disease similar to bacterial spot was found on Japanese hornwort cultivated in open field at Iwate town, Iwate prefecture. Diseased plants developed irregularly shaped brown spot on leaves. When causal agent infected from leaf edge, V-shaped brown lesions were occasionally developed along veins. These symptoms were revealed on the host plants by the artificial inoculation with bacterial isolates obtained from fresh lesions. These bacteria were identified as
Pseudomonas viridifflava (Burkholder 1930) Dowson 1939 on the basis of their bacteriological properties. This is the first report for this bacterium to attack Japanese hornwort.
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Katsumi OZAKI, Takashi SHIRAKAWA
1996 Volume 1996 Issue 47 Pages
62-64
Published: November 30, 1996
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Fifteen isolates of
Fulvia fulva, collected from Iwate prefecture, were identified as race1·2·3, according to Day's system. The two breeding stocks “Tomato Ano Nal and Na2” were found to be resistant to race 1·2·3.
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Kiichi TAIRAKO, Mitsuyo IMAIZUMI
1996 Volume 1996 Issue 47 Pages
65-68
Published: November 30, 1996
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Mitsuyo IMAIZUMI, Kiichi TAIRAKO
1996 Volume 1996 Issue 47 Pages
69-71
Published: November 30, 1996
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Shigeru OSADA, Masashi SASAHARA
1996 Volume 1996 Issue 47 Pages
72-74
Published: November 30, 1996
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Harukuni HORITA, Fujio KODAMA
1996 Volume 1996 Issue 47 Pages
75-77
Published: November 30, 1996
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In 1994, a disease indicated as bud rot was detected on chrysanthemum in Hokkaido district in Japan. The diseased buds were covered with dark brown lesion in which orange sporodochia appeared.
Fusarium isolates collected from diseased plants produced macroconidia which were very long, slender, and thin-walled. The basal cell of macroconidia was notched or foot-shaped. No isolates produced chlamydospores. The fungus was pathogenic to both chrysanthemum and wheat. Thus, the fungus causing the disease was identified as
Fusarium avenaceum (Fr.) Sacc. This is the first report of bud rot disease of chrysanthemum in Japan.
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Masayoshi ASARI, Noboru MIZUNO
1996 Volume 1996 Issue 47 Pages
78-81
Published: November 30, 1996
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Kouji YOSHIDA, Tasumi SAITOU, Teruo SANO, Tutae ITO, Kouichi SUZAKI
1996 Volume 1996 Issue 47 Pages
82-84
Published: November 30, 1996
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Yoshimitsu ABE, Mitsuru ABE, Shigeaki HAYASHI, Tadashi OGATA
1996 Volume 1996 Issue 47 Pages
85-87
Published: November 30, 1996
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Takanobu YOSHIDA, Yoshikuni NOMURA, Kei SHIMIZU
1996 Volume 1996 Issue 47 Pages
88-90
Published: November 30, 1996
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Ryosuke TSURUTA
1996 Volume 1996 Issue 47 Pages
91-94
Published: November 30, 1996
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Koji SAKURAI
1996 Volume 1996 Issue 47 Pages
95-97
Published: November 30, 1996
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Takashi KIDOKORO
1996 Volume 1996 Issue 47 Pages
98-100
Published: November 30, 1996
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Hiroo KANNO
1996 Volume 1996 Issue 47 Pages
101-104
Published: November 30, 1996
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Hiroaki OKADA
1996 Volume 1996 Issue 47 Pages
105-106
Published: November 30, 1996
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The effects of the difference in initial population densities of
Meloidogyne arenaria on the yield and growth of a soybean plant, cv. Suzuyutaka was examined in pot experiments. The analysis of the effects was made by fitting the Seinhorst's equation to the density-yield (growth) relationship. For both of the yield and growth, the tolerance limit was estimated to be 0.16 juveniles per g of dried soil, and the minimum yield (growth) to be 0.78 of the maximum yield at densities more than 10 juveniles per g of dried soil. The root-knot index number became large as the initial population density rose.
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Masashi KAKIZAKI
1996 Volume 1996 Issue 47 Pages
107-110
Published: November 30, 1996
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Masashi KAKIZAKI
1996 Volume 1996 Issue 47 Pages
111-113
Published: November 30, 1996
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Masashi KAKIZAKI
1996 Volume 1996 Issue 47 Pages
114-117
Published: November 30, 1996
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Akeo IWASAKI, Katsuhiro FITRITKAWA
1996 Volume 1996 Issue 47 Pages
118-121
Published: November 30, 1996
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A release experiment of adult tarnished plant bug,
Lygus rugulipennis Poppius, to adzuki bean,
Phaseolus angularis L. showed that the bug injures the bean seeds with stinging marks on them. Seeds harvested from four crop fields were examined, and 4 to 12% of them were recognized as injured. In addition, results of these experiment and examinations suggested that feeding by the bug caused not only stinging marks on seeds but also shriveled seeds.
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Takashi NODA, Shunichi MIYAI, Kazuhiko KONISHI
1996 Volume 1996 Issue 47 Pages
122-124
Published: November 30, 1996
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Toru MIZUKOSHI, Reiji NAKAGAWA
1996 Volume 1996 Issue 47 Pages
125-128
Published: November 30, 1996
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Susceptibility of the diamondback moth,
Plutella xylostella, to seven
Bacillus thuringiensis products (BT) and five conventional insecticides was evaluated by the field test and laboratory assay at Oono of Oshima district in 1995. In field test, the effect of BT products of dead-spore formulation was more effective than that of the spore and crystal formulation products. Laboratory assay was conducted by the application method using the 2nd and 3rd instar larve collected from cruciferous crops. LC
50 values of BT products were in the range from 1.3 to 5.2ppm, but the value of chlorfluazron and a mixture of fenvalerate and malathion was 646 and 60 ppm, respectively.
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Kazuhiro OKAZAKI, Hiroyuki OHYA, Atsushi NAKAMURA, Rikio SATO, Masao A ...
1996 Volume 1996 Issue 47 Pages
129-133
Published: November 30, 1996
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Masatake SASAKI, Rikio SATO
1996 Volume 1996 Issue 47 Pages
134-136
Published: November 30, 1996
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Takashi KOJIMA, Yoshimitu ABE, Noriyoshi ABE, Taiji OHHARA, Hiroyuki O ...
1996 Volume 1996 Issue 47 Pages
137-139
Published: November 30, 1996
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Ken FUNAYAMA
1996 Volume 1996 Issue 47 Pages
140-142
Published: November 30, 1996
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The ‘Fuji’ apple fruit was sucked remarkably by the adult of brown marmorated stink bug
Halyomorpha mista in early to mid August, and was most susceptible to sucking injury during the term as fruit thickening period. The feeding marks i sucked fruit were difficult to distinguish in this term, but the injury was observed cleary as hollow with dark green peel, and flesh beneath the hollow discolored brown with loose sponge.
The feeding corn was observed on the hollow, even if salivary seath was difficult to search in the spongy flesh.
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Kazuhiro WATANABE
1996 Volume 1996 Issue 47 Pages
143-144
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Toshimichi OKUBO
1996 Volume 1996 Issue 47 Pages
145-148
Published: November 30, 1996
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Hirofumi HAYAKAWA
1996 Volume 1996 Issue 47 Pages
149-150
Published: November 30, 1996
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A total of 215 tabanid flies belonging to 18 species were collected from one tethered cattle in a pasture surrounded forest on the outskirts of Morioka City in Iwate Prefecture.
Tabanus nipponicus and
Hybomitra jersey were predominant occupying 26.5% and 20.0% of the total, respectively. Two peaks of infestation were observe from middle to late June and from early to late August, with reaching 40 flies in 15 minutes at the highest time.
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Hirofumi HAYAKAWA
1996 Volume 1996 Issue 47 Pages
151-152
Published: November 30, 1996
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A total of 127 tabanid flies belonging to 14 species were collected from one tethered cattle in a Prefectural Taneyama Pasture at Sumita-machi in Iwate Prefecture. The most dominant species was
Tabanus nipponicus, followed by
Hirosia humilis, occupying 51.8% and 13.4% of the total, respectively. Seasonally, one peak of infestation was observed at around middle August with reaching 43 flies in 15 minutes at the highest time.
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Hirofumi HAYAKAWA
1996 Volume 1996 Issue 47 Pages
153-155
Published: November 30, 1996
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A total of 23 species of dung beetles were collected in a pasture on Kitakami Heights at Sotoyama, Tamayama-mura in Iwate Prefecture. The most dominant species was Caccobius jessoensis occupying 50.3% of the total, followed by
Aphodius haroldianus 14.9% and
C. suzukii 9.6%.
Onthophagus lenzii, one of the most promising species for burying cattle dung, accounted for only 0.1%. Seasonally, dung beetles appeared from middle May to middle October with the highest peak at late July.
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1996 Volume 1996 Issue 47 Pages
156-167
Published: November 30, 1996
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