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In the central zone of Mexico, rice (Oryza sativa L.) is planted under transplant and in direct sowing under irrigation; most varieties have been released for transplant. In 2005, one of these lines was used as a parent and continued with the generational advance to F5. In 2011, a preliminary performance test was carried out on several groups of lines, around 256 materials, from which C14Za06 was identified as outstanding (currently, Var. Morelos A-2016). In 2014 and 2015 different lines were evaluated in performance trials in the towns of Zacatepec, Jojutla, Emiliano Zapata, Mazatepec, Coatlan del Río and Cuautla, Morelos state; in addition to the commercial witness Morelos A-2010. Of the evaluated materials, C14Za06 stood out for its yield superior to 10 t ha-1 , moderate resistance to pyricularia, high tolerance to grain staining, semi-erect growth habit, plant height of 130 cm, resistant to lodging; industry performance of 57% whole polished grain; conserving the Morelos quality (20% of white center). [ABSTRACT FROM AUTHOR]

The distribution, incidence and severity damage caused by the dieback complex (Lasiodiplodia spp.) in Persian lime (Citrus latifolia) was determined in 46 orchards of six average years old, 25 trees per orchard in the municipalities of Amacuzac, Ayala, Coatlan del Rio, Cuautla, Jantetelco, Jonacatepec, Puente de Ixtla, Tepalcingo and Tlaltizapan of Zapata, Morelos State, Mexico. Incidence was evaluated according to the number of plants having symptoms of dieback. There were four levels of severity, where 0= healthy tree, 1= gum exudation, 2= cracking with exposure of internal tissue and 3= well-defined canker and branch dieback. Which were transformed to a percentage of means of a scale of three levels of severity, transforming to a percentage of infection using the Townsend and Heuberger equation. Data were analyzed trough the Kruskal Wallis test and Tukey (α=0.05) and p<0.0001 in incidence and severity. There was a high incidence of dieback on stems 78% of Persian lime trees. The incidence and severity of dieback of Persian trees on different orchards had a range of 31.8 to 100% and 30 to 100%, respectively. By the other hand, municipalities such as Amacuzac, Ayala, Coatlan del Rio and Tlaltizapan, had the lowest levels of incidence and severity of dieback. [ABSTRACT FROM AUTHOR]

Physic nut (Jatropha curcas) is a multipurpose plant that has acquired importance as biofuel; due to the oil extracted, its seed can be used to produce biodiesel. Vascular tissue necrosis, vascular wilting, root rot, dieback and shortening symptoms were observed in J. curcas plantations in Yucatan, Mexico. The objective this work was to identify the causal agent of symptoms using conventional and molecular techniques. Pathogenicity tests in the greenhouse, morphological characterization and sequence analysis showed that the causal agents of the disease were Fusarium solani and Fusarium equiseti. This is the first report of F. solani as causal agent of vascular tissue necrosis, vascular wilting and root rot, and also the first report of F. equiseti to cause dieback and shortening in J. curcas in Mexico. [ABSTRACT FROM AUTHOR]