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| Mantecón,Jorge D. |
| Late blight (Phytophthora infestans) is the most destructive fungal disease of potato (Solanum tuberosum) in Argentina, reducing yields considerably. During the 1986-2005 growing seasons, fungicide treatments to control potato late blight were performed using mancozeb (Dithane M80 WP, Dow AgroScience Argentina, 1986-2005) every 7 d, metalaxil+mancozeb (Ridomil MZ 72 WP, Syngenta Agro Argentina, 1986-1995) every 14 d, and mefenoxam+mancozeb (Ridomil Gold 68 WP, 1996-2005) every 7 d. Blight severity was rated five times each season on the basis of the percentage of diseased foliage caused by late blight. Five visual assessments of infection were used to calcúlate the area under the disease-progress curve (AUDPC, foliar blight x day). Marketable (>60 g)... |
| Tipo: Journal article |
Palavras-chave: Chemical control; Late blight; Phytophthora infestans; Potato; Potato diseases; Solanum; Yield increases. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100011 |
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| Gutiérrez-Ibáñez,Ana T; Laguna-Cerda,Antonio; Rojas-Martínez,Reina; González-Garza,Ramiro; Salgado-Siclán,Martha L. |
| The Mexican potato (Solanum tuberosum L.) crop is affected by several diseases, including purple top (PPT). PPT is caused by phytoplasma and is transmitted by insects in the Cicadellidae family. In severe infections, this pathogen can cause yield losses of nearly 100%. The objective of this research was to identify and classify (at a molecular level) the causal agents of PPT. Potato plants were sampled in the state of Mexico (at Tenango del Valle, Zinacantepec, Atlacomulco and Donato Guerra) in the spring and summer of 2006. Approximately 40% of the plants tested positive for phytoplasma. The presence of plant DNA was determined by amplifying an endogenous gene with the 16s-1/16s-2 primers. To detect phytoplasma, the P1/P7 universal primers were used for... |
| Tipo: Journal article |
Palavras-chave: Phytoplasma; Potato diseases; Potato purple top. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200010 |
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