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Toru MIZUKOSHI
2002 Volume 2002 Issue 53 Pages
187-190
Published: November 30, 2002
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The foxglove aphid,
Aulacorthum solani, is holocyclic in Hokkaido, and overwinters in the egg stage. The total nymphal periods of oviparous female and male in the stage from the 1st to the 4th instar at 15°C were 12.5days and 24.5days, respectively. The average oviposition period of unmating oviparous females was 4.6days and these females survived for 23.5days after the first larviposition. Male adults survived for 25.8days at 12°C. In a field in the Tokachi district, the first oviparous female adults were recorded in mid-October and the first male adults somewhat later. It is considered that the time lag of adult appearance between oviparous female and male are due to the difference in their developmental periods.
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Toru MIZUKOSHI
2002 Volume 2002 Issue 53 Pages
191-193
Published: November 30, 2002
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A comparison of the seasonal changes in the numbers of foxglove aphid alates,
Aulacorthum solani, caught in yellow water pan traps between a potato field (no control) and a weedy field (hibernaculum) was conducted from 1986 to 1989 in the Tokachi district of Hokkaido. A low number of
A. solani alates were trapped in June that had migrated from the hibernaculum. A high number of alates that appeared on host plants around traps trapped from mid-July. The time of first trap catch differed each year, but the peaks of trap catch coincided.
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Tohru ONO, Takashi KIDOKORO, Jun OYAMA
2002 Volume 2002 Issue 53 Pages
194-198
Published: November 30, 2002
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I. Seasonal Occurrence and Influence of Meteorological Factors on Outbreaks
Tomohiro SATO, Kiyoshi UENO, Osachi ABE, Shinichi GOTO, Takashi SAITO
2002 Volume 2002 Issue 53 Pages
199-202
Published: November 30, 2002
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II. Proper Application Timing for Control
Kiyoshi DOMON, Shin-ichi ITO, Kazuhiro WATANABE, Hitoshi KUSADA
2002 Volume 2002 Issue 53 Pages
203-205
Published: November 30, 2002
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III. Susceptibility of the Foxglove Aphid to Insecticides and Control Effects of Ethofenprox
Kiyoshi UENO, Takashi SAITO, Rieko CHUBA, Osachi ABE, Tomohiro SATO, S ...
2002 Volume 2002 Issue 53 Pages
206-208
Published: November 30, 2002
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IV. Effect of Foliar Spray Insecticides on the Foxglove Aphid in the Field
Kiyoshi UENO, Takashi SAITO, Osachi ABE, Tomohiro SATO, Shinichi GOTO
2002 Volume 2002 Issue 53 Pages
209-212
Published: November 30, 2002
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Masashi KAKIZAKI
2002 Volume 2002 Issue 53 Pages
213-215
Published: November 30, 2002
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The population suppression effects of the cabbage armyworm,
Mamestra brassicae, and the flax budworm,
Heliothis maritima adaucta, by mating disruption using the sex pheromone components were examined in the field. Three thousand six hundred sex pheromone dispensers for the mating disruption containing (Z)-11-hexadecenyl acetate and (Z)-11-hexadecenal, which are the sex pheromone components of the diamondback moth,
Plutella xylostella, were placed in a 3.6-ha field. In the field with the dispensers, the numbers of egg masses of
M. brassicae and the numbers of larvae of
H. maritima adaucta were lower than those in a nontreated field, and those near the circumference of the treated field also were the same as those in the center of the field.
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Yumiko SATO, Tomohiro TAKAHASHI, Kuniaki TSUKIJI
2002 Volume 2002 Issue 53 Pages
216-220
Published: November 30, 2002
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Cheng Yi CAI, Yasuhiko KONNO, Kazuhiro MATSUDA
2002 Volume 2002 Issue 53 Pages
221-225
Published: November 30, 2002
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Feeding responses of
Helicoverpa armigera and
H. assulta to Solanaceae plants were investigated. Among the five plant diets (eggplant leaf, eggplant fruit, tomato leaf, tomato fruit, and tobacco leaf) and artificial diet (Insecta LF) tested,
H. armigera had the highest preference for eggplant fruit, whereas
H. assulta had equal preference for eggplant fruit, insecta LF and tobacco leaf. We also investigated the feeding responses of both species to methyl alcohol extracts of Solanaceae plants.
H. armigera had equal preference for the methanol extracts of eggplant fruit, eggplant leaf, tomato fruit and tobacco leaf, whereas
H. assulta preferred that of tobacco leaf. These results suggest that the feeding stimulants that exist in Solanaceae plants for
H. armigera and
H. assulta are slightly different.
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Hitoshi KUSADA, Shinichi ITOH, Kazuhiro WATANABE
2002 Volume 2002 Issue 53 Pages
226-228
Published: November 30, 2002
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Takahiro FUKUOKA, Hiroaki YAMAKAGE, Tokumitsu NIIYAMA
2002 Volume 2002 Issue 53 Pages
229-231
Published: November 30, 2002
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Mitsutaka SAKAKIBARA, Kenji TAKASHINO
2002 Volume 2002 Issue 53 Pages
232-235
Published: November 30, 2002
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A rearing method for individual diamondback moth (
Plutella xylostella) larvae without diet change was developed. Most of the larvae with a 100mg (or heavier) of leaf of cruciferous plants in a sealed plastic tube (25m
l) succeeded in cocooning, pupation and emergence. Newly emerged adults could normally copulate and lay viable eggs. However, in the case of plants leaves that yellowed and/or decayed within 7 to 10 days, most of the
P. xylostella larvae did not develop into pupae. This simple and inexpensive rearing method could be used in various bioassays for
P. xylostella larvae.
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Toshimichi OKUBO
2002 Volume 2002 Issue 53 Pages
236-240
Published: November 30, 2002
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Yuji KIMURA
2002 Volume 2002 Issue 53 Pages
241-244
Published: November 30, 2002
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Mika TAGAE, Reishi OHTOMO
2002 Volume 2002 Issue 53 Pages
245-247
Published: November 30, 2002
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Mika TAGAE, Reishi OHTOMO
2002 Volume 2002 Issue 53 Pages
248-250
Published: November 30, 2002
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Junko GOTO, Takekatsu CHIBA, Shun SATO
2002 Volume 2002 Issue 53 Pages
251-255
Published: November 30, 2002
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Akiyasu IITOMI, Tokumitsu NIIYAMA
2002 Volume 2002 Issue 53 Pages
256-260
Published: November 30, 2002
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In Akita, three kinds of insect were recognized to be the dominant pest on water shield.
Polypedilumtigrinum injured young leaves of the plant, causing the quality of the goods to decline.
Elophila interruptalis and
Galerucella nipponensis might have a negative influence on the growth of the plant by injuring its floating leaves. The damage to the floating leaves of the plant by
P. tigrinum was observed frequently from late May until the end of July, and the severe damage caused by the
E. interruptalis and
G. nipponensis from the beginning of June until the end of September.
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Kozo KAWASHIMA
2002 Volume 2002 Issue 53 Pages
261-263
Published: November 30, 2002
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Kôzô KAWASHIMA
2002 Volume 2002 Issue 53 Pages
264-267
Published: November 30, 2002
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Kôzô KAWASHIMA
2002 Volume 2002 Issue 53 Pages
268-272
Published: November 30, 2002
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Ken FUNAYAMA
2002 Volume 2002 Issue 53 Pages
273-275
Published: November 30, 2002
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The susceptibility of adult
Halyomorpha halys to more than half of the insecticides used was high, but the mortality of this organism cyhalothrin, fluvalinate, flucythrinate, and thiodicarb was 30% or less. The susceptibility of adult
Plautia crossota stali to most of the insecticides used, except flucythrinate, was also high. The susceptibility to insecticides was significantly different for the two species. Insecticides with a high residual effect on
H. halys were fenitrothion, methidathion, and phenthoate in organophosphorus, and permethrin and bifenthrin in synthetic pyrethroid.
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Shinichi GOTO, Tomohiro SATO, Osachi ABE, Takashi SAITO, Takashi MARUK ...
2002 Volume 2002 Issue 53 Pages
276-278
Published: November 30, 2002
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Hironobu SUSA, Kumiko YAGINUMA, Haruo KATSUMATA
2002 Volume 2002 Issue 53 Pages
279-281
Published: November 30, 2002
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Kumiko YAGINUMA, Hironobu SUSA, Haruo KATSUMATA
2002 Volume 2002 Issue 53 Pages
282-284
Published: November 30, 2002
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Masanori TAKABE
2002 Volume 2002 Issue 53 Pages
285-286
Published: November 30, 2002
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7. Possibility of Reducing Insecticide Application by Using Communication Disruption in the Control of the Fruit Moths
Kazuhiro OKAZAKI, Akihiro ARAKAWA
2002 Volume 2002 Issue 53 Pages
287-289
Published: November 30, 2002
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8. The Influence of Cutting Down Disused Apple Trees on the Damage by Peach Fruit Moth in Adjoining Apple Orchards
Kazuhiro OKAZAKI, Akihiro ARAKAWA, Mitsuru ABE
2002 Volume 2002 Issue 53 Pages
290-292
Published: November 30, 2002
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Akihiro ARAKAWA, Kazuhiro OKAZAKI, Mitsuru ABE, Masatake SASAKI, Noriy ...
2002 Volume 2002 Issue 53 Pages
293-296
Published: November 30, 2002
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Atsuhiko KUSHIDA, Youji MOMOTA
2002 Volume 2002 Issue 53 Pages
297-300
Published: November 30, 2002
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Axenic culture of
Heterodera glycines was established on milk-vetch roots (
Astragalus sinicus L.) genetically transformed by
Agrobacterium rhizogenes. As the juvenile inocula increased, the number of females produced on the hairy roots increased but the ratio of females to inocula decreased. An inoculum level of 150-300 juveniles per petri dish (9cm diameter) on Root Culture Medium was the most efficient for propagating
H. glycines. There were no significant differences in the number of produced females or in the period required for one generation between the milk-vetch hairy root and the soybean hairy root or cultured soybean root. One or two egg-laying females had to be transferred to a new hairy root culture to continue its life cycle because of the decline of hairy root activity. Milk-vetch hairy roots have the remarkable advantage over any other axenic cultured roots in that they are sufficiently transparent to enable observation of parasitic juveniles in the roots.
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Takashi NARABU, Hiroyuki TSUJI, Shizuko ISHIKAWA
2002 Volume 2002 Issue 53 Pages
301-304
Published: November 30, 2002
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The effects of fallow or
Tagetes erecta and
Avena strigosa planting on the population density of
Pratylenchus penetrans were studied in the field in Tokachi, Hokkaido, Japan. Planting of
A. strigosa for 60 days or
T. erecta for 100 days strongly suppressed the growth of P penetrans. Planting of
T. erecta for 100 days, as well as weed-controlled fallow for three years, was found to be the most effective way to control
P. penetrans. Planting of
T. erecta for 60 days or fallow in summer did not sufficiently reduce the growth of
P. penetrans. Weed-contaminated fallow increased the growth of
P. penetrans, as most weeds in the test field are good hosts of
P. penetrans.
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Akeo IWASAKI
2002 Volume 2002 Issue 53 Pages
305-307
Published: November 30, 2002
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In the spring of 2001, more than half of the soybean seedlings sown on a small field (approximately 1.9 are) in Kunneppu, Hokkaido were infested by Hokkaido hare,
Lepus timidus ainu. Most of the infestations occurred before late June, and unifoliate primary leaves were cut off just above the cotyledons. The infestation rate was highest on the marginal row of the beans and tended to decrease in the inner rows of the field. In each row, infested plants tended to occur in batches, rather than in a random sequence. In autumn, the infested plants had smaller numbers of branches, lower plant heights, and smaller numbers of pods than those of the non-damaged plants and account for about 11% loss in yield. The estimated yield loss of the soybean field caused by the hare, calculated using “ratio of infested plants ×11%”, might be negligible when the proportion of infested plants is small.
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2002 Volume 2002 Issue 53 Pages
308-317
Published: November 30, 2002
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