It focused on after weeding in the river embankment mowed grass. Mowed grass is related to the next thing, visibility of the embankment surface at the time of embankment inspection and strength of the embankment vegetation root system, Prevent the mulch of leaves of the embankment topsoil, Intrusion suppression of the mole, etc. From field test and monitoring survey, it revealed the impact on the river embankment strength by mowed grass. The resulting findings are considered to contribute to the achievement of the future of efficient and effective embankment vegetation management techniques.

A mark-release-recapture survey of adult Eastern Pale Clouded Yellow, Colias erate poliographus Motschulsky, 1860, was conducted in early winter and spring along the south-facing embankment of the Mibu River, Nagano Prefecture, Japan, over a distance of more than 2,000 m. A time-series analysis showed that the total number of individuals captured in spring was affected by mowing in October of the previous year. The number of recaptured females in spring was extremely small. In spring, 43% and 80% of all captured males and females were highly migratory. The lifespan of males was up to 23 days, during which time changes in behavior and age were observed. The relationship between the number of days that elapsed from initial capture to recapture was well expressed by an exponential function. The rate of decrease per day in the number of individuals captured was 22% for early winter males and females, 10% for spring males, and 14% for spring females. The high rate of decrease in early winter was estimated to be due to the high mortality rate. The average distance migrated daily by recaptured early winter males was more than twice that of spring males. The longest migration distance was at least 2,000 m for early winter males and approximately 1,300 m for spring males and females. With regard to migration on the embankment, early winter males and spring males tended to concentrate near the herb Vicia hirsuta and the flowering plant community.

2015 年5 月に宮城県名取市内のレンゲほ場でゾウムシの多発が確認されたため，農林水産省横浜植物防疫所に同定を依頼した結果，アルファルファタコゾウムシＨypera postica（Gyllenhal）（コウチュウ目：ゾウムシ科）であることが明らかになった．本種はマメ科牧草を食害する侵入害虫であり，発生は県内では初確認であったため，県内の分布状況を5 月下旬～6 月上旬に調査した．病害虫防除所の巡回調査地点を中心に県内131 地点でほ場周辺の寄主植物を調査したところ，シロツメクサを主な寄主植物として，25 地点で発生が確認された．県内の分布は，主に県南部および県中央部の沿岸地帯や平野部で発生が確認され，県北部の平野部および県西部の山間高冷地では発生が確認されなかった．これらの地域では調査時点で未発生あるいは少発生であったと推測された．

Root parasitic weeds, Striga spp., Orobanche spp. and Phelipanche spp., are one of the destructive agricultural weeds and an effective parasite control strategy is desired. We revealed that a galactosyl-sucrose trisaccharide, planteose is immediately decreased in germinating seeds of Orobanche minor, and hypothesized that this metabolism is important for germination of root parasitic weeds. Glycosidase inhibitors which affect planteose metabolism were screened and nojirimycin bisulfite (NJ) was found to selectively inhibit germination of O. minor and to interfere with planteose metabolism by inhibiting sucrose degradation. The inhibitory effect of NJ on germination was cancelled by addition of glucose. The activities of sucrose hydrolyzing enzymes, invertases were lower in the NJ-treated seeds than those in germinating seeds. We concluded that NJ inhibits the germination by blocking the supply of essential glucose from sucrose in the planteose metabolic pathway by inhibiting invertase activation. The planteose metabolic pathway could be a new target for selective control of the parasites.

In general, the river embankment is covered with the vegetation such as grass in order to protect the slopes. In a cooler region such as Hokkaido, alien species such as Kentucky Bluegrass have been used to protect the embankment. The purpose of this research is to clarify appropriate native grass species in the cooler region and how to plant them.

The investigation using native species was conducted on the left embankment along Chitose River. As native species, seven species were chosen, and the planting method was used humic acid spraying and vegetation sheets. The survey data collected for 3 years revealed that 5 native species (Yoshi (Phragmites australis), Ogi (Miscanthus sacchari florus), Biroudosuge (Carex fedia Nees var. miyabei (Franch.) T. Koyama), Yamaawa (Calanagrostis epigeios), and Ooyomogi (Arlemisia vulgaris)) were available in cooler region. It was also revealed that vegetation sheet was effective as planting method.

北海道空知支庁幌加内町からアキノキリンソウ属 （キク科）の1新種，ソラチアオヤギバナ Solidago horieana Kadota を記載した． 種形容語 （種小名） は発見者の堀江健二博士への献名である．

　ソラチアオヤギバナはアオヤギバナと同じく渓流植物の一つで，アオヤギバナとは， (1)花がより大きく，(2)茎葉が小数個で茎に疎らにつき，(3)葉の向軸面に屈毛が密生し，(4)総苞片や苞葉の先端が尾状鋭先頭となり，(5)総苞外片がより長い点で区別できる．根生葉は花期にも生存する傾向がある．

　ソラチアオヤギバナは雨竜川上流の長留内川沿岸に生える蛇紋岩植物でもあり，付近にはエゾノコギリソウ，オオヨモギ（ヤマヨモギ），ツボスミレ，シロツメクサ，