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Showing 1 to 20 of 46 for “"Aphis"”.
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Soybean Resistance and Defense Responses Against Aphis Glycines
The soybean aphid, Aphis glycines Matsumara, has become an important pest of soybean [Glycine max (L.) Merrill] in North American since 2000. Host plant resistance is an economical way to control aphids. Soybean resistance against A. glycines was studied by (i) characterizing the antibiosis type of …
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Contribution to the systematics of the genus Aphis (Hemiptera:Aphididae)
A phylogeny of the genus Aphis was built primarily from specimens collected in the Midwest of USA. A topology using UPGMA were constructed with 73 taxa and forty-one morphological characters with their character states of alate and apterae viviparous females. I identified four main groups: …
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Management of the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), in Iowa
<p>In North America, the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) is a pest of soybeans, Glycine max (L.) Merrill. The main goal of this research was to verify the preliminary economic threshold for A. glycines management in Iowa. Secondary goals included; verifying an …
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Selección y caracterización de germoplasma de melón resistente a A. Aphis gossypii y a los virus que transmite
… que se han obtenido indican que la especie Aphis gossypii actúa como vector mas eficaz en la transmisión del Cuncurber mosaic virus (CMV) mientras que Myzus persicae actúa corno vector mas eficaz en la transmisión del Water melón virus-2 (WMV-2) y Zucchini yellow mosaic virus (ZYMV). No se …
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Relationship of the apple aphis and other insects to the dissemination of fire blight in apple orchards, with a view to methods of blight control
Our present knowledge, as indicated by the above data, proves that fire blight is due to a specific organism, a bacterium known in science as Bacillus amylovorus, which manifests itself in the following ways: 1. Blossom blight, due to the bacterial infecting the nectary of the flower and …
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TRACKING PLANT VIRUS INFECTIONS THROUGH MULTIPLE DIMENSIONS: A SEARCH FOR SOURCES OF NONPERSISTENT VIRUS VECTORS AND RESERVOIRS AT LOCAL AND REGIONAL SCALES
… mosaic virus or cucumber mosaic virus. Therioaphis trifolii and Aphis craccivora were positively associated with PRSV, and Aphis nerii with WMV. Rhopalosiphum padi was negatively associated with WMV. No relationship between total aphid or noncolonizing species counts was found with virus …
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Epidemiology, Aphid Vectors, Impact and Management of Tobacco Etch Potyvirus in Hot Peppers in Jamaica
… These aphids included five known vectors of TEV, Aphis gossypii Glover, A. craccivora Koch, A. spiraecola Patch, Lipaphis erysimi Hille Ris Lambers and M. persicae (Sulzer), and 12 new records for Jamaica, Aphis amaranthi Holman, Brachycaudus helichrysi (Kaltenbach),Capitophorus hippophaes …
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Evaluación de productos botanicos y químicos sobre el complejo mosca blanca (Bemisa tabaci Gennadius) Geminivirus en el cultivo del tomate (Solanum esculentum, Mill.), en Tisma- Masaya
… asociados al cultivo del tomate como: áfidos (Aphis gossypii) por planta, ( Halticus sp ) por planta y minador de la hoja ( Liriomyza sp ) por planta. De los tratamientos evaluados, el menor promedio de moscas blancas por planta lo presentó el tratamiento Imidacloprid seguido de Crisantemo. El …
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Characterization of Transgenic Peanuts Expressing Oxalate Oxidase for Governmental Approval of Their Release for Control of Sclerotinia Blight
… the Animal and Plant Health Inspection Service (APHIS), the Food and Drug Administration (FDA), and the Environmental Protection Agency (EPA). These agencies require several different data sets including molecular characterization and field studies before each transformation event can be …
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The effect of spirea aphid (Homoptera: aphididae) feeding and nitrogen fertilization on the growth of young apple trees, with comparisons to apple aphid
… was to determine the effects of spirea aphid, Aphis spiraecola Patch, feeding and nitrogen fertilization on net photosynthesis (Pn), leaf chlorophyll content and greenneess, growth, dry matter accumulation, and carbohydrate concentrations of young apple trees, with comparisons to apple aphid, …
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Planning for Pollinators, Encouraging Biodiversity for Agriculture Resiliency
… species are pollinating insects such as <em>Aphis mellifera </em>(honeybee) and other native species. This is due to a phenomenon known as colony collapse disorder (CCD) and other native bees. The decline indicates that the future habitability of earth may be in jeopardy. The solution to this …
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Aphids as vectors of peanut mottle virus
… been demonstrated. Known vectors of PMV such as Aphis craccivora (Koch) and Myzus persicae (Sulzer) comprised 31% of the aphid population in peanuts compared to 14% in soybeans and 17% in cowpeas and could be responsible for the higher number of peanut infections. In addition, trapping of live …
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Mechanism of vector resistance in groundnut to control groundnut rosette virus disease in Sub-Saharan Africa
Analysis of biological performance parameters of Aphis craccivora on groundnut variety ICG12991 in laboratory and field trials demonstrated that ICG12991 was resistant to the aphid vector of groundnut rosette diseases and that this resistance was stable over time and under high aphid pressure. …
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Predator-prey interactions involving the soybean aphid (Hemiptera: Aphididae) in Missouri
The recently introduced soybean aphid, Aphis glycines Matsumura, is found in all soybean growing areas within Missouri. Despite soybean aphid's widespread distribution, it has reached economic threshold in few soybean fields in Missouri. We hypothesized that a predator complex suppresses soybean …
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Field studies on the ringspot disease of Burley tobacco in Washington County, Virginia
… cucumeris), leaf hopper (Empoasa fabea), Aphis (Macrosiphum solanifolii) and the lightning bug (Photinus scintillans) did not survive when caged on tobacco, and no infection was obtained with them. The tobacco worm (Phlegethontius quinquemoculata) survived but did not transmit ringspot. 4. …
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QUANTIFYING DISTURBANCE FACTORS AND EFFECTS IN COMMON TERNS (STERNA HIRUNDO) USING VISUAL, AUDIO, AND REPRODUCTIVE DATA
… tern nests during the breeding season, and USDA-APHIS participates in a lake-wide hazing program to control double-crested cormorants (Phalacrocorax auritus). The goal of this study was to discern and describe disturbances which might affect the projected sustainability of the common tern colony …
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Construction and evaluation of infectious cDNA clones and analysis of packaging determinants of Soybean dwarf virus
… present study also showed that soybean aphids (Aphis glycines) can vector SbDV, that the readthrough protein (RTP), a minor structural protein involved in specificity of aphid transmission, is much more diverse than the major coat protein among Midwestern SbDV isolates, and that no mutations …
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Trade Barriers or Trade Catalysts? The Effects of Phytosanitary Measures on U.S. Fresh Fruit and Vegetable Imports
… products. To address this concern, USDA's APHIS implements phytosanitary measures that mitigate pest and disease risks. These regulations vary from documentation requirements, inspection, or requiring that shipments receive a phytosanitary treatment. A growing body of literature attempts to …
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Progressi nel controllo sostenibile degli afidi
… e di origine naturale nei confronti dell’afide Aphis gossypii, nonchè i loro effetti collaterali sul parassitoide Aphidius colemani. Inoltre, poiché i nemici naturali meritano attenzione per le valutazioni eco-tossicologiche, è stato prima stabilito un protocollo di allevamento per il …
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