九州病害虫研究会報
Online ISSN : 1884-0035
Print ISSN : 0385-6410
ISSN-L : 0385-6410
54 巻
選択された号の論文の30件中1~30を表示しています
原著論文
病害
  • 平八重 一之, 藤本 知子, 山口 純一郎, 中島 隆, 藤田 佳克
    2008 年 54 巻 p. 1-6
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    By using a primer set of pJF1 and pJR1, polymerase chain reaction (PCR) fragments, ca. 1,300 bp and ca. 2,700 bp were amplified from Pyricularia grisea isolates, Kyu9439013 and OS99-G-7a, respectively. The fragments were found to be unique to each isolate, suggesting that these could be used as specific DNA markers for the 2 isolates. Further investigation confirmed the specificity of the fragments: in the 480 isolates examined, some showed a fragment of ca. 800 bp, while others showed none. The specific markers of the 2 isolates were stably detected after 50 times transfer on medium and 7 times infection on rice leaves. Further, virulence of the 2 isolates was not reduced after the rice infection. Thus, since the isolates Kyu9439013 and OS99-G7a can be clearly identified by a specific DNA marker, these can be used as efficient tools to trace the rice blast pathogen in natural fields.
  • 山崎 修一, 吉松 英明, 武政 彰, 玉嶋 勝範
    2008 年 54 巻 p. 7-12
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    2007年 4月下旬から,大分県でさび病の多発生が認められ,コムギ黄さび病と同定された。本病は,大分県では1966年および1983年に多発して以降ほとんど発生が認められなかった。そこで,県内85圃場を調査した結果,ほぼ県内全域で黄さび病の発生が認められ,特に県北部および東部で発生が多かった。また,テブコナゾール水和剤およびプロピコナゾール乳剤は,いずれも一定の防除効果が認められた。さらに,発生予察圃場や県内各地の麦類奨励品種決定圃場において,本病害の発病程度を品種別に調査した結果,「チクゴイズミ」が最も高く,「ニシノカオリ」がそれに次いで高く,「農林61号」は概ね低かった。
  • 小川 哲治, 佐山 充, 迎田 幸博
    2008 年 54 巻 p. 13-17
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    暖地ジャガイモ栽培の最重要病害である疫病に対して,薬剤散布回数の削減を可能にする効率的な防除技術の確立が求められている。そこで,防除薬剤の残効に大きく影響すると考えられる耐雨性の評価を目的とし,人工降雨処理施設で試験を実施した。ポリポットに栽培したジャガイモの茎葉に各種薬剤を散布後,人工降雨処理を行い,疫病菌接種による発病調査結果から算出された防除価によって耐雨性を評価した。試験は2回行い,試験 Iでは各薬剤を常用濃度およびその1 ⁄ 5濃度,試験IIでは常用および1⁄2濃度に調製して散布した。人工降雨処理における累積降雨量は,試験 Iでは100, 200および300mm, 試験IIでは100および200mmになるように設定した。各薬剤ごとに処理降雨量の増加にともなう防除効果の低下の程度が異なり,耐雨性に差が認められた。供試薬剤のうち,シアゾファミド水和剤およびベンチアバリカルブイソプロピル・TPN水和剤は,人工降雨処理による防除効果の低下がほとんど認められず耐雨性が高かった。
  • 森田 昭
    2008 年 54 巻 p. 18-23
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    長崎県のビワ産地における病害虫の発生状況と防除実施について1981年~1988年の 8年間調査した。その結果,枝葉の病害では灰斑病が50.9%,虫害ではナシマルカイガラムシが37.6%と最も高く,果実の病害虫ではたてぼや病が5.1%と最も高った。ビワの栽培管理の中では病害虫防除の実施率が81.8%と最も低く,無防除園が約20%あった。長崎県のビワ栽培現場での病害虫に対する年間防除回数は平均2.5回,年間農薬使用数は平均3.9薬剤で樹勢を低下させるがんしゅ病,ナシマルカイガラムシおよび果実品質を低下させるたてぼや病対象の防除回数が多かった。がんしゅ病は病斑部削り取り・薬剤塗布後毎年銅水和剤を散布,白紋羽病は根部掘り上げ・薬剤処理後に毎年根部土壌へ薬剤を灌注処理,クワカミキリは枝幹部潜入の幼虫を針金で刺殺後に毎年産卵枝を除去するなど1回きりの防除でなく毎年防除作業を継続することで高い効果が得られた。各種の防除指導を採用した園は健全果率および大果率が高かった。
  • 菊原 賢次, 石井 英夫
    2008 年 54 巻 p. 24-29
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    Leaves and young fruits infected with Japanese pear scab were sampled from Japanese pear orchards in Fukuoka Prefecture in 2006 and 2007. Conidia collected from the samples were inoculated on the young leaves of potted pear trees previously sprayed with difenoconazole, fenbuconazole, hexaconazole, or fenarimol. Difenoconazole showed a high level of efficacy, while hexaconazole and fenbuconazole showed intermediate levels of efficacy. The efficacy of fenarimol was observed to be lower against the inocula from Fukuoka Prefecture as compared with that against the sensitive reference inocula. Fenarimol-resistant isolates are widely distributed in Fukuoka Prefecture.
  • 今村 幸久, 久野 公子, 興梠 裕美, 中村 薫, 神川 朋恵
    2008 年 54 巻 p. 30-38
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    A new disease was observed in sweet pea (Lathyrus odoratus L.) growing in greenhouses in Miyazaki Prefecture, Japan, in 2004. A Fusarium sp. that was highly pathogenic to sweet pea was isolated from the bases of sweet pea. On the basis of morphological tests performed using synthetic low-nutrient agar (SNA) and potato dextrose agar (PDA) cultures, the isolate was identified as Fusarium oxysporum. Further, the analysis of partial nucleotide sequences of the mitochondrial small subunit (mtSSU) rDNA and β-tubulin gene of the isolate confirmed the isolate to be F. oxysporum. This disease has not been reported in Japan till date. In foreign countries, F. oxysporum f. sp. vasinfectum can be seen as a pathogen causing sweet pea wilt in the “Index of Plant Diseases in the United States”. However, the details of the disease remain unknown. Therefore, we propose the following common name for this disease: fusarium wilt of sweet pea (“sweet pea kabugare-byo” in Japanese). The isolate were also strongly pathogenic to common bean (Phaseolus vulgaris). The level of sensitivity to the pathogen varies depending on the cultivar of sweet pea.
  • 西 菜穂子, 牟田 辰朗, 宮路 克彦, 尾松 直志, 白山 竜次, 新屋敷 生男, 太崎 義博, 岩元 宏一, 川村 幸弘, 徳永 太蔵, ...
    2008 年 54 巻 p. 39-43
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    In 2001, a new symptom was observed on the stem of Japanese Easter lily (Lilium longiflorum Thunb. “ Hinomoto” ), which was characterized by reddish-brown streaks (“ aka-suji” in Japanese) in Okinoerabu Island, Kagoshima Prefecture, Japan. It seemed that first chlorotic stripes (“ shiro- suji” in Japanese) appeared and these later turned reddish-brown when the lily approached the flowering stage in the seasonal cycle. Double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) detected Cucumber mosaic virus (CMV) and Lily symptomless virus (LSV) in lily with reddish-brown streaks. However, these 2 viruses were also detected in symptomless lily plants, indicating that additional factors might exist that induce the symptom. Further, we determined that the reddish-brown streaks were transmitted by the vegetative propagation of lilies. Taken together, these results suggested a viral etiology of the reddish-brown streaks.
虫害
  • 里見 綽生
    2008 年 54 巻 p. 44-50
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    Nephotettix cincticeps populations collected at various localities in northern and southwestern Japan were examined to elucidate whether the differences in the fertility and the density dependence of fertility between the two regions were sufficiently large to explain the difference in peak population densities observed in rice fields in the two regions. The experiments consisted of comparison of the fertility among several populations in test tubes or outdoor cages and that of density effects on the fertility between Sado (northern) and Chikugo (southwestern) populations. The result shows that both the population groups were almost similar in fertility as a whole. In the experiments for determining the effect of density on fertility, the numbers of eggs laid per female in the Sado and Chikugo populations were compared at three and four density levels. The linear regression coefficients between the densities and the numbers of eggs laid per female in terms of log-transformed values were similar in both the populations at three density levels, and no significant differences were found between the populations or densities at the four density levels. Therefore, it cannot be concluded that the southwestern populations are less fertile or more susceptible to changes in population density than the northern populations.
  • 小嶺 正敬, 清治 有, Phouvong Souvanhnavongsa
    2008 年 54 巻 p. 51-55
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    ラオス北部4地点の雨季作移植 1~ 2か月後の無防除水稲圃場において,イネウンカ類とその天敵の発生状況を黄色粘着板への払い落とし法で調査した。いずれの地点においてもセジロウンカの発生がトビイロウンカより多かったが,生息密度は両種ともに低かった。天敵類はクモ類やカタグロミドリカスミカメが多かった。また,イネウンカ類ラオス個体群の薬剤感受性を微量局所施用法で検定した。その結果,トビイロウンカに対するLD50値は,イミダクロプリドとBPMCでは,10μg⁄g以上,エトフェンプロックスとチアメトキサムは2 μg⁄g前後,フィプロニルは0.1μg⁄gであった。セジロウンカに対するLD50値は,イミダクロプリド,フィプロニルおよびチアメトキサムでは 1μg⁄g以下であった。フィプロニルではセジロウンカの薬量・死虫率プロビット回帰直線の傾きが0.3と緩やかであった。
  • 山口 卓宏, 鳩野 哲也, 和泉 勝一, 西原 悟, 木村 浩司, 鳥越 博明, 田中 丈雄, 宮路 克彦, 原 洋一, 上田 秋則, 重井 ...
    2008 年 54 巻 p. 56-59
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The sweet potato weevil, Cylas formicarius (Fabricius) is a major insect pest of the sweet potato, Ipomoea batatas (L.) Lam. throughout the tropical and subtropical regions of the world. We estimated the entire adult male population of C. formicarius at its low-density period on Kikai Island, Kagoshima Pref., Japan. The population of adult males at the high-density period in September was about 5 times larger than that at its low-density period in May, both of which were estimated by Yamamura' s method. Using this calculation in combination with an estimate of the maximal population size (<4×106) by Sugimoto et al. in 1994, the total number of male weevils at their low-density period can be assumed to be less than 8×105.
  • 上里 卓己, 小濱 継雄
    2008 年 54 巻 p. 60-63
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The method for preparing ordinary larval artificial diet for Euscepes postfasciatus (old diet) was complicated and time consuming. Some ingredients (casein, saccharose, salt mixture, etc.) of the diet were added to boiled agar solution, others (vitamin mixture, sweetpotato powder, etc.) were added after the solution was cooled to 55°C. To simplify the diet preparation, we combined all ingredients before mixing with water, and then boiled the solution (new diet). There were no significant differences of survival rate (from egg hatching to adult eclosion) and right elytron length between the weevils reared on the old and new diets, but the development period (from egg to adult) of the weevils fed the new diet was significantly (1.3 days) longer than that of those fed the old diet. Preparation time of the new diet was half that of the old diet. These results suggest that simplified diet preparation can be introduced into the mass-rearing of E. postfasciatus.
  • 上室 剛, 福田 健, 山口 卓宏, 牟田 辰朗
    2008 年 54 巻 p. 64-68
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    We examined the residual effects of the granular insecticides applied on sweet pepper plants on the survival of the green peach aphid, Myzus persicae. Sweet pepper seedlings were transplanted in a green house after applying imidacloprid or nitenpyram granules at the recommended dosage of 2 g ⁄ plant. Then, an upper leaf and a lower leaf were taken from each plant at 5, 12, 19 and 26 days after the insecticide treatment and were examined. Each test leaf was set in a Munger cell into which 10 adult female green peach aphids were released. The survival of the aphids and the number of nymphs laid by these insects were determined after 48 hours. The leaves from the plants treated with imidacloprid exhibited high insecticidal activity and suppressed the production of nymphs at 5 and 12 days after the insecticide treatment. The lower leaves retained a high residual effect for 19 days, but the residual effect in the upper leaf was considerably reduced after the same period. The effect of imidacloprid application disappeared at 26 days. The leaves treated with nitenpyram exhibited high insecticidal effect and suppressed the production of nymphs at 5 and 12 days, although the mortality rate of aphids on the upper leaves started to decrease on the 12th day after the insecticide treatment. The effect of nitenpyram application almost disappeared with some residual effect on nymph production on the 19th day. Therefore, it is necessary to initiate other control methods for transplanted seedlings when the effectiveness of the initial treatment is diminished.
  • 福田 健, 井上 栄, 柿元 一樹, 柏尾 具俊
    2008 年 54 巻 p. 69-73
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The oviposition site and habitat of Haplothrips brevitubus (Karny) on fruits were investigated. Many eggs of H. brevitubus were found on the flowers and the surfaces of calyces of eggplant, the bracts of strawberry, and the abaxial surfaces of the upper leaves of sweet pepper. Most of the larvae and adults of H. brevitubus were found on the flowers of eggplant and strawberry and on the flowers and growth nodes of sweet pepper. These results suggested that the larvae and adults of H. brevitubus mainly inhabit the flower; they tend to oviposit around the flower in areas with dense trichomes and minute air spaces.
  • 福田 健, 井上 栄明, 柿元 一樹, 柏尾 具俊
    2008 年 54 巻 p. 74-77
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The predation of adult female Haplothrips brevitubus(Karny) (Thysanoptera: Phlaeothripidae) on 3 species of greenhouse thrips was investigated. The number of secondstage larvae of Thrips palmi, Frankliniella occidentalis, and Frankliniella intonsa consumed by a H. brevitubus female increased with the prey density. The maximum predation number per day against second-stage larvae were 8.7 for T. palmi, 9.4 for F. occidentalis, and 8.5 for F. intonsa, when only thrips were provided, and 16.1 for T. palmi, 14.0 for F. occidentalis, and 8.2 for F. intonsa when the pollen of strawberry was provided along with thrips. These results show a predatory ability almost equal to that of other enemies such as Amblyseius eharai and Amblyseius cucumeris. Therefore, H. brevitubus could be an effective biological control agent for these thrips.
  • 森田 茂樹, 柏尾 具俊, 井上 栄明, 柿元 一樹
    2008 年 54 巻 p. 78-84
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The development and fecundity of Haplothrips brevitubus (Karny) (Thysanoptera: Phlaeothripinae) that fed on the pollen of some fruit vegetables were studied. H. brevitubus was allowed to feed on the pollen of strawberry, eggplant, and green pepper as well as pine pollen, Ephestia kuehniella eggs, and Frankliniella intonsa 1st instars used for comparison. The mean developmental periods of H. brevitubus from hatching to adult emergence were 14.7, 13.9, 13.6, 15.2, 14.0, and 15.8 days and the mean numbers of eggs laid per day were 6.7, 5.9, 3.9, 6.7, 7.9, and 5.1 for pollen of strawberry, eggplant, green pepper, and pine, E. kuehniella eggs, and F. intonsa 1st instars, respectively (25°C, 16L8D). The mean longevity of H. brevitubus that had fed on strawberry, green pepper pollen, and E. kuehniella eggs were 66.0, 46.1, and 73.4 days, respectiveely; the mean numbers of eggs laid during their lifetime were 289.9, 92.6, and 314.8, respectively. The data were not statistically significant for any biological parameter among the food types. These results suggest that the pollen of fruit vegetables tested here are almost equivalent to an animal diet such as moth eggs and thrips as food for H. brevitubus.
  • 柿元 一樹, 井上 栄明, 柏尾 具俊
    2008 年 54 巻 p. 85-92
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    ミナミキイロアザミウマとその捕食性天敵アカメガシワクダアザミウマおよびタイリクヒメハナカメムシに及ぼす粒剤の影響をナスの鉢植え条件と温室内の直植え条件下で調べた。粒剤処理したナスの葉を供試した場合の 3種の死亡率と天敵 2種の産卵数を,処理後7,14,21,28日後に実験室内で調べた。影響の程度は,粒剤の種類と種間で異なった。ミナミキイロアザミウマに対するアセフェートとカルボスルファンの影響はネオニコチノイド剤よりも小さく,本種のネオニコチノイド剤処理条件下での死亡率は,処理 7日後で20~50%であり,薬剤間で影響の程度に違いは見られなかった。粒剤の影響は,ミナミキイロアザミウマよりも天敵 2種に対して大きく,その持続期間はアカメガシワクダアザミウマで 7~14日,タイリクヒメハナカメムシで14~21日と見られた。ネオニコチノイド剤の中でも,ニテンピラムは天敵 2種に対する影響が最も小さかった。
  • 市川 大輔, 大野 和朗
    2008 年 54 巻 p. 93-98
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    To develop an augmentative biological control with resident natural enemies in vegetable greenhouses, a common agricultural weed, Commelina benghalensis L. was investigated with respect to the occurrence of predacious natural enemies in Miyazaki City and Kiyotake Town, Miyazaki Prefecture in mid to late November. A total of 9 species in 3 families were collected from 18 sites. In the agricultural lands near the foot of a small mountain, the mean number of natural enemies per site was 18.8±8.04(±SD), and Propylaea japonica (Thunberg) was predominant species, followed by Orius spp. In the agricultural flatlands, the mean number of natural enemies per site was 27.9±35.46, and Orius spp. were predominant, followed by P. japonica (Thunberg). In the agricultural lands and vacant areas near the seaside, the mean number of natural enemies per site was 52.7±41.02, and P. japonica (Thunberg) was predominant, followed by Pilophorus typicus (Distant). The diapause rate of collected Orius spp. was approximately 50% . These results suggested that C. benghalensis L. is a reservoir of these beneficial natural enemies.
  • 井園 佳文, 古野 秀和
    2008 年 54 巻 p. 99-104
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    アブラムシ類の有力天敵であるコレマンアブラバチを対象としてDDVP乳剤,ダイアジノン水和剤,アセフェート水溶剤,イミダクロプリド顆粒水和剤をキャベツ葉に散布し,雌成虫を接触させた場合のLC50を調査した結果,それぞれ53.1ppm, 2.65ppm, 12.2ppm, 95.2ppmの値が得られた。また,これらの薬剤を実用濃度で露地圃場のキャベツに散布し,薬剤の残留量と雌成虫に対する残留毒性(殺虫活性)の経時的推移を調査した結果,DDVP乳剤,アセフェート水溶剤およびイミダクロプリド顆粒水和剤の3 薬剤は散布直後~散布 3日後まで高い残留毒性が認められたが,その後,毒性は急速に低下した。一方,ダイアジノン水和剤は,雌成虫の死亡虫率は散布 5日後まで100 %で,散布14日後においても約40%であり,長期間の高い毒性が持続した。これらの残留毒性の推移は,キャベツ葉における薬剤の残留量の推移とほぼパラレルの関係にあった。各種薬剤のコレマンアブラバチ雌成虫に対する毒性はLC50値から予想されるものより軽微で,圃場では毒性は比較的早期に消失することが示唆された。
  • 鍬田 龍星, 口木 文孝, 衛藤 友紀, 近藤 知弥, 中村 宏子, 古田 明子, 白石 祥子, 緒方 和裕
    2008 年 54 巻 p. 105-108
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    佐賀市川副町の佐賀県農業試験研究センター内に設置した地上高10mのネットトラップで採集したコナジラミ類成虫数を調査した。コナジラミ類は 6月から採集され, 8~10月に増加し,11月に終息した。2001~2004年にネットトラップで採集されたコナジラミ類および施設トマト圃場で採集したタバココナジラミを対象に,PCR-RFLP法でタバココナジラミのバイオタイプを識別した。その結果,2003年12月以前に採集された個体は全てバイオタイプB,2004年 6月 1日以降に採集された個体は全てバイオタイプQであった。
  • 上門 隆洋, 大薗 正史
    2008 年 54 巻 p. 109-111
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The effects of the release of Bemisia tabaci (Gennadius) Q and B biotypes on kidney bean pods were investigated via an experiment. The release of the B. tabaci Q biotype caused discoloring of the kidney bean pods. This characteristic discoloring occurred on the flower cluster that was located immediately above the treated leaves.
  • 田 野飛, 坂巻 祥孝, 津田 勝男, 櫛下町 鉦敏
    2008 年 54 巻 p. 112-117
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The relative abundance of three Liriomyza leaf miners, L. bryoniae, L. trifolii and L. sativae infesting 23 cultivars/species of commercially cultivated vegetables and ornamental flowers was examined over three growing seasons, in a field survey on the Satsuma Peninsula of Kagoshima Prefecture, Kyushu Island. Infested leaves were sampled monthly and the relative abundance of emerging flies was compared among plant cultivars or taxa. For L. bryoniae, we found just a single adult that emerged from a cucumber sampled in 2005. The relative abundance of the leaf miners tended to depend on the families of the host plants. L. trifolii completely predominated on members of Brassicaceae, Compositae, and Umbelliferae, while L. sativae predominated on members of Cucurbitaceae, although a few L. trifolii emerged each year. L. trifolii and L. sativae were both sampled constantly on 3 species of Solanaceae and 3 species of Leguminosae and abundant species varied inconsistently among sites and among years. These results conflicted with a similar survey conducted on Honshu Island in the following 3 points : 1) there were few individuals of L. bryoniae ; 2) L. trifolii predominated completely on Brassicaceae ; and 3) L. trifolii and L. sativae were both sampled on Leguminosae and the abundant species varied inconsistently.
  • 遠藤 信幸, 和田 節
    2008 年 54 巻 p. 118-122
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    The synthetic pheromone of Riptortus pedestris (Heteroptera: Alydidae) attracts Piezodorus hybneri (Heteroptera: Pentatomidae) as well as conspecific insects, showing cross-species attraction. However, the attractiveness of live R. pedestris to P. hybneri has never been investigated. In this study, we compared the attractiveness of synthetic pheromone and males of R. pedestris to P. hybneri in soybean fields. Large numbers of P. hybneri were caught in a water-pan trap baited with the synthetic R. pedestris pheromone (50 mg). In contrast, very few P. hybneri were caught in a trap baited with R. pedestris (10 males), although a large number of R. pedestris were caught, which indicated that the R. pedestris males actually release their pheromone. Herein, we discuss this contradiction in attractiveness between the synthetic pheromone and male R. pedestris.
  • 松山 隆志, 原口 大, 久場 洋之
    2008 年 54 巻 p. 123-126
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    沖縄県におけるミバエ類侵入警戒用モニタリングトラップの防蟻剤として用いられてきたフジタングル®(富士薬品工業株式会社)(旧剤)が製造中止になったことから,その代替資材としてTree Tanglefoot Pest Barrier® (The Tanglefoot® Company, Michigan, USA)(新剤)のアリの侵入防止能力及び物理的性質について旧剤との比較を行った。新剤のアリの侵入防止能力においては51日間の調査期間をとおして旧剤と有意な差は見られず,また溶解や硬化もみられなかった。これらの結果から,新剤のミバエ類侵入警戒モニタリングトラップ用防蟻剤としての有効性を考察する。
  • 上里 卓己, 新垣 則雄
    2008 年 54 巻 p. 127-131
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    Field surveys were conducted from August 2007 to January 2008 with 2 methods on 6 islands to detect the invasion and settlement of the Asiatic palm weevil, Rhabdoscelus similis (Chevrolat) (Coleoptera: Rhynchophoridae) on Miyako Islands. The first method was adult capture with bait traps (split and fermented mature cane stalks) on sugarcane fields and palm stands. The second was inspection of the palm trees (Dypsis lutescens (H. Wendl.)) to detect the larvae or pupae that develop in the stems. Weevils were found in the traps at Hirara, Gusukube, and Ueno areas on Miyako Island (6 ⁄ 108 traps), but not on Ikema (0⁄ 4 traps), Kurima (0 ⁄ 3 traps16 , Irabu (0 ⁄ 15 traps), Shimoji (0 ⁄ 4 traps), and Tarama Islands (0 ⁄ 16 traps). Although no adults were caught in the bait traps, the larvae and pupae of R. similis were found in the palm stems on Irabu and Kurima Islands. This survey thus confirmed the invasion and settlement of R. similis on Miyako, Irabu, and Kurima Islands.
  • 岩堀 英晶, 上杉 謙太, 立石 靖
    2008 年 54 巻 p. 132-137
    発行日: 2008年
    公開日: 2009/10/06
    ジャーナル フリー
    A field survey of the plant-parasitic nematodes in upland field crops, fruit trees, weeds, etc., was carried out at 94 sites in Okinawa Prefecture, Japan. The nematodes were extracted by the Baermann funnel technique and classified into root-knot (Meloidogyne spp.), root-lesion (Pratylenchus spp.), reniform (Rotylenchulus reniformis), stunt, spiral, pin, and ring nematodes on the basis of their morphological characters. Root-knot and root-lesion nematodes were identified by polymerase chain reaction-restriction fragment length polymorphism (PCRRFLP) analysis. Meloidogyne arenaria (Type Okinawa), M. incognita, Pratylenchus zeae, and P. coffeae (Type A) were the dominant species. M. hapla and P. kumamotoensis were recorded for the first time in Okinawa.
講演要旨
病害虫の発生と防除の概況
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