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| Registros recuperados: 51 | |
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| Alcántara Jiménez, José Angel. |
| Polyphagotarsonemus latus es una especie cosmopolita que afecta diferentes cultivos tanto en áreas templadas como tropicales. El principal daño ocasionado por esta especie es la reducción o deformación de hojas jóvenes, brotes, frutos y flores. En papayo, el daño en hojas causado por este ácaro es conocido como "mano de chango" porque el área foliar de las hojas de papayo se reduce casi hasta las nervaduras, simulando los dedos de un mono. Este daño es similar al causado por Papaya Ringspot Virus (PRSV-P). Debido a que P. latus y PRSV-P causan daños similares a las hojas de papayo, el objetivo general de esta investigación fue estudiar la relación que existe entre el ácaro P. latus y PRSV-P en la reducción foliar de Carica papaya cv Maradol roja. Tres... |
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Palavras-chave: Papayo; Area foliar; Síntomas; Relación ácaro-virus; Leaf area; Damage; Virus-mite relationship; Doctorado; Fruticultlura. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/238 |
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| Tarfaoui, Mostapha; Gning, P.b.; Davies, Peter; Collombet, F. |
| The impact behavior of composite materials has been extensively studied but interest has been centered on flat plates. For underwater applications, thick composite cylinders are employed and several questions must be addressed concerning the influence of accidental impact. The aim of this work is to study the dynamic response of tubular structures. Such structures find many applications but the damage upon impact is not taken into account during their dimensioning. However, at the time of their handling or in service the damage introduced by accidental impact can compromise their capacity to fulfill their function. The cylinders are thick and consist of epoxy matrix and glass fiber reinforcement. After having observed the nature of the damage related to... |
| Tipo: Text |
Palavras-chave: Size effect; Scale effect; Damage; Impact; Filament winding. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2458.pdf |
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| Flechtmann,Carlos A.H.; Ottati,Angelo L.T.. |
| We report for the first time the attack of the walking stick Tetanorhynchus leonardosi (Mello-Leitão) (Orthoptera: Proscopiidae) on young eucalyptus, Eucalyptus urophylla, in Brazil. The upper third of the trees was attacked (apical meristems and new leaves). During the hottest hours of the day the insects were found sheltered between leaves on the median third of the plants, and feeding when temperatures were milder. The attack was heterogeneous in the stand, being more concentrated when it was neighbouring an area of native 'Cerrado' vegetation. Mean defoliation was 5.8%, with an average of 5.2% of plants with apical meristems cut by the walking sticks. An application of Methyl Parathion was not effective against the pest. Apparently plants older than 6... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Damage; Dispersion; Walking stick. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000300027 |
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| Duchini,Paulo Gonçalves; Echeverria,Joilson Roda; Américo,Luana Fidelis; Guzatti,Gabriela Cristina; Cherman,Mariana Alejandra; Sbrissia,André Fischer. |
| ABSTRACT: Cyclocephala flavipennis Arrow, 1914 (Coleoptera: Melolonthidae), popularly known as white grub, is an insect widely disseminated in the South Region of Brazil. Despite the frequent occurrence of this white grub in areas cultivated with winter cereals, it is generally not considered a pest, since it feeds on straw and dead plant material. However, in 2015 and 2016, this insect has been identified as the damage-causing agent in the perennial winter pastures in Lages, Santa Catarina, Brazil. Damage was observed in patches and caused reduction in root depth and mass, resulting in loss of vigor, accelerated senescence in aerial parts, and death of tillers in Festuca arundinacea Schreb. and Dactylis glomerata L. plants. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Damage; Dynastinae; Grass; Pest; Santa Catarina. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500153 |
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| Sa-ang Chairin; Supatra Suwanthada; Sumalee Sangparm. |
| Survey of rice stored pest in The Upper Northern part of Thailand was done in 3 agricultural cooperatives (Nongmuongkai, Maejai and Chiangsaen) using food trap during December 2011 – November 2012. The results showed that 25 stored rice insect pest were found (18 important insect pests and 7 natural enemies). At Nongmoungkai, the important insect pests were Liposcelis spp., Lophocateres pusillus, Sitophillus oryzae and Ceyptolestes pusillus were found with the survey number of 2, 206, 580, 365 and 108 respectively. The natural enemies Xylocoris flavipes was found with the number of 225. At Maejai, the important insect pests were S. oryzae, L. pusillus, L. spp., Rhyzoopertha dominica C. pusillus and Oryzaephilus surinamensis found with the survey number of... |
| Tipo: PhysicalObject |
Palavras-chave: Stored pest; Rice; Upper northern; Liposcelis; Lophocateres pusillus; Sitophilus oryzae; Cryptolestes pusillus; Storehouse; Insect pest; Natural enemies; Survey; Damage; แมลงศัตรูข้าว; ข้าวสาร; ภาคเหนือตอนบน; เหาหนังสือ; มอดสยาม; ด้วงงวงข้าว; มอดหนวดยาว; โรงเก็บข้าวเปลือก; ยุ้งฉาง; การสำรวจแมลงศัตรูพืช; การประเมินความเสียหาย; การทำลายของแมลงศัตรูพืช. |
| Ano: 2014 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5693 |
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| Kornsiri Srinil; Nootjarin Jungkhun; Tarapron Yuenyong; Kuntera Kanta; Antika Tonmit; Netnapa Pumhan. |
| Study about the accordance of rice insect pests from the light trap and the research data of insects in the rice seed of San-pah-tawng 1 (weak) and that of SuphanBuri 1 (resistant) was conducted from the year 2011 to 2013 at the Chiang Rai Rice Research Center. It’s found that the rice insect pests entrapped by the light trap being increased from the year 2007 to 2010. That in May, 2011, 4,779 zigzag leafhoppers were mostly found; in March, 2012, 19,248 whitebacked planthoppers were mostly found and; in May, 2013, 19,047 zigzag leafhoppers were mostly found. In the paddy field, rice insect pests were found in the rice seed of San-pah-tawng 1 more than that of Suphan Buri 1. In the In-season rice of the year 2011, the White backed planthoppers were mostly... |
| Tipo: PhysicalObject |
Palavras-chave: Whitebacked planthoppers; Brown planthoppers; Light trap; Climatic change; Rice; Sanpatong 1 variety; Suphanburi variety; Weak variety; Resistant variety; Insect pest; Natural enemies; Survey; Damage; Population dynamics; Chiangrai province; เพลี้ยกระโดดหลังขาว; เพลี้ยกระโดดสีน้ำตาล; ข้าว; พันธุ์สันป่าตอง 1; พันธุ์สุพรรณบุรี 1; พันธุ์อ่อนแอ; พันธุ์ต้านทาน; การสำรวจแมลงศัตรูพืช; กับดักแสงไฟ; การเปลี่ยนแปลงสภาพภูมิอากาศ; ภาวะโลกร้อน; การทำลายของแมลงศัตรูพืช; การประเมินความเสียหาย; การทำลายของแมลงศัตรูพืช; จ.เชียงราย. |
| Ano: 2014 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5696 |
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| 松田, 清明; 宮本, 啓二; 佐藤, 禎稔; MATSUDA, Kiyoaki; MlYAMOTO, Keiji; SATOW, Tadatoshi. |
| 近年，連続的にナガイモ掘取りを行う機種が開発 され，利用され始めている.今回，従来から使用さ れているバックホー方式(K機)と掘取り方式の異なる3機種(A，SおよびT機)の掘取り機について， 作業性能を明らかにするとともに，各掘取り機の負 担面積や利用経費について検討した. 1)収穫作業に携わる作業者数は6-12人と供試機 により異なるが，概して能率の高い機種ほど作業 者は多い. 2 )各供試機の作業能率は， K機が2.2a/hであるのに 対して， A機が5.8a/h， S機は3.8a/h， T機が3.7a/h といずれも高能率である.10a当り投下労働量は， それぞれ27.8-32.4，20.8，21.0，21.9人・時である. 3 )各供試機の作業精度は，無傷の本数割合がいず れも98%以上と高く，損傷や掘残しの割合は極め て低い. 4 )各供試機の負担面積は， A機が4ha，K機は1.5ha， S機とT機が2.5haであり，その時のha当り機械利 用経費は，それぞれ556千円， 1,113 -1,173千円， 687千円， 699干円となる.各供試機の導入が不利 となる下限面積は， K機を他作業に利用するとい ずれも0.49-0.56haの範囲である. 従って， A機は高能率であるが多くの労働力や 前後処理に他の作業機を必要とし，大規模農家向 きである.また， K機は作業能率が低いが，少人 数でも作業が可能なことから小規模農家に適し，S機やT機は中規模農家に適している. Diggers of the backhoe type, the trencher type, and the plow type have been mainly used to harvest Chinese yams until... |
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Palavras-chave: ナガイモ; 掘取り機; 作業能率; 作業精度; 損傷; 負担面積; 経費; Chinese yam; Digger; Working capacity; Operating accuracy; Damage; Coverage cost. |
| Ano: 2001 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2831 |
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| Registros recuperados: 51 | |
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