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Volume 13 (1969)
- Issue 4 Pages 167-
- Issue 3 Pages 117-
- Issue 2 Pages 47-
- Issue 1 Pages 1-
Volume 13, Issue 4
Displaying 1-7 of 7 articles from this issue
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Toshitsugu OKADA1969 Volume 13 Issue 4 Pages 167-173
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSSoil (pearlite and sand) in pots having soybean plants was inoculated with soybean cyst nematodes or leguminous bacteria, either at the sowing time or two or four weeks after sowing, or, with both nematodes and bacteria at different combinations. The plants were grown with a deficiency of nitrogen. Heavy infection of nematodes with inoculation of bacteria, particularly a simultaneous infection of nematodes and bacteria, caused the delay and decrease in nodule formation on roots. It is considered that nematodes have produced unfavorable conditions in roots for bacterial infection and the resultant nodule formation. Discoloration of plant leaves appeared to be related closer to the bacterial nodule formation than to nematode infection. The best growth of plant as well as the slightest damage from nematodes occurred when inoculation of bacteria was made at the sowing time comparing with the later inoculations. As the time of bacterial inoculation was delayed, the damage from nematodes tended to become severer. The damage to soybean plant is caused, to a larger part, by the decrease in the nodule formation which is also caused by the nematodes, rather than by the direct injury of nematodes to roots.View full abstractDownload PDF (904K) -
Chisato HIRANO, Takeshi YUSHIMA1969 Volume 13 Issue 4 Pages 174-184
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSIn two series of tests with rice plants grown on soil in pots, 32P-labeled diazinon granules were broadcast onto irrigation water or applied into culture soils. Study was done on dissolution and hydrolysis rates of 32P-diazinon in water, and absorption, translocation, and persistence of insecticidal-32P activity as well as total radioactivity in rice plants. When granules were broadcast onto irrigation water, diazinon dissolved rapidly into the water, with the highest concentration at 3 days after application. Thereafter diazinon level in the water lowered rapidly owing to absorption by plants and hydrolysis into non-insecticidal compounds. Diazinon and its hydrolysis products were absorbed into plants through leaf-sheath; although some of the absorbed radioactive compounds translocated to leaf-blade and root, most of them were retained in the leaf-sheath. When granules were applied into soils, no radioactivity was detected in the irrigation water. Absorption of radioactivity from soils was conducted by the root, and most of the radioactive compounds translocated to the leaf-blade but less to the leaf-sheath. Among total radioactivity in the rice plants, percentage of insecticidal radioactivity was much higher in the leaf-sheath than in the leaf-blade. Broadcasting the diazinon granules onto irrigation water seemed to be a better way for control of the rice stem borer larvae (Chilo suppressalis) attacking on the leaf-sheath, as compared with the granule application into soils.View full abstractDownload PDF (4041K) -
Ryuzo KOBARA1969 Volume 13 Issue 4 Pages 185-190
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSElectrophoretic patterns of hemolymph proteins in the larvae of fall webworm, Hyphantria cunea, which had been reared from field-collected eggs on the leaves of different food plants, were studied. By means of agarose-gel electrophoresis, the hemolymph protein was resolved into three main fractions, A, B, and C. Although, in the hemolymph of larvae reared on leaves of Morus bombycis, Salix subopposita, Juglans mandshurica, and Acer negundo, the three main fractions of protein were clearly detected, B fraction was undetectable in the larvae reared on the other 8 plants, namely Cornus controversa, Sambucus sieboldiana, Diospyros kaki, Prunus yedoensis, Populus nigra, Rubus palmatus, Liquidambar formosana, and Styrax japonica. Thus, the B-protein fraction would appear in the electropherogram of hemolymph from larvae supposed to be reared with suitable food plants for the larval growth. When the food plants, such as S. sieboldiana and D. kaki, were replaced to feed the larvae with M. bombycis, B-protein fraction in the larval hemolymph became detectable about three days thereafter.View full abstractDownload PDF (3029K) -
III. Insecticidal Characteristics of Carbamates to Planthoppers and LeafhoppersHikaru KAZANO, Yasuhisa KUROSU, Masaru ASAKAWA, Toshihiko TANAKA, Kazu ...1969 Volume 13 Issue 4 Pages 191-199
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSInsecticidal characteristics of 10 carbamates, 2-chloro-3, 5-dimethylphenyl-(CXMC), 3, 5 dimethylphenyl-(XMC), 2-methyl-4-allylphenyl-(AMPMC), 2-chlorophenyl-(CPMC) 2-isopropoxyphenyl-(PHC), 3, 4-dimethylphenyl-(MPMC), 2-isopropylphenyl-(MIPC), 3-methylphenyl-(MTMC), and 3, 4-dimethyl-6-chlorophenyl N-methylcarbamate, and carbaryl, were compared using the smaller brown planthopper, Laodelphax striatellus FALLÉN, the green rice leafhopper, Nephotettix cincticeps UHLER, and the brown planthopper, Nilaparvata lugens STÅL. LD50 values by 3 hour contact on residual dry film to the smaller brown planthopper and the green rice leafhopper, and LD50 values by the topical application method to the green rice leafhopper were determined. The LD50 values to the green rice leafhopper by the two application methods were run in parallel. The increase of LD50 values with descending temperature was observed to be little except for carbaryl. KT50 values were determined graphically from the time-knocked-down insects curve. There was little difference in the KT50 values with carbamates and KT50 values with malathion to the smaller brown planthopper though MIPC and carbaryl showed differences. PHC showed the smallest KT50 value among them. KT50 values of AMPMC, carbaryl, and 3, 4-dimethyl-6-chlorophenyl N-methylcarbamate to the green rice leafhopper were larger than those of other carbamates. AMPMC, CXMC, XMC, PHC, and carbaryl were effective against the brown planthopper. The results of spraying test, using the rice plants cultivated in the Wagner's pot, showed that insecticidal activity of PHC, carbaryl, and CXMC to the smaller brown planthopper and the green rice leafhopper lasted long. In the case of the insecticide than application into pot water, the residual insecticidal activity of MIPC was much longer in spraying.View full abstractDownload PDF (1049K) -
Nobutake HABU1969 Volume 13 Issue 4 Pages 200-205
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSIn Japan it is said that Dendrolimus spectabilis has usually one generation a year, but in some localities a part of its population appears to have another generation. For investigating the voltinism of D. spectabilis with its life cycle, this work was carried out under field and semi-natural conditions at Kyoto City in 1967 and 1968. The development of larvae and the date of adult emergence were studied in relation to the body size of overwintered larvae and to the date of egg hatching. The results were as follows: The larvae overwintered at the 4th to the 7th instar. The larvae hatched in earlier season overwintered at the more advanced instar. The larvae overwintered in the advanced stage tended to emerge in earlier date of the following summer. A part of the larval population which had hatched in the middle of July emerged as adult in September and passed another generation in the same year, while the remaining part of the population overwintered at the 5th to the 7th instar of larvae. The larvae of the second generation overwintered at the 4th instar. From the results mentioned above, it was concluded that a part of the population passed its life cycle once or twice a year, while the considerable part of the population had a peculier life cycle in which adult emerged once and twice a year, alternatively.View full abstractDownload PDF (655K) -
Narumi YOSHITAKE, Tsutomu HASHIGUCHI1969 Volume 13 Issue 4 Pages 206-207
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (306K) -
Tetsu ASAYAMA, Norimitsu OSAKI1969 Volume 13 Issue 4 Pages 207-209
Published: December 25, 1969
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (1125K)
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