http://www.plantstress.net/Scientific communications en Recently, inducer products of the resistance of the plants, like Optimus (Bioiberica, S.A.), have arisen as a good alternative to the indiscriminate use of fungicides, controlling the recurrent appearance of fungi diseases, and diminishing the chemical residues in horticulture and fruit cultures. With the objective of showing the biological bases of action of the product, a test in controlled conditions has been carried out in a model guest-pathogen system. The induction of biochemical and structural defense response in Arabidopsis thaliana has been evaluated against a biotrophic fungus, subsequent to the application of the Inducer in evaluation, comparing it with a standard treatment. In parallel, it has been wanted to prove the effectiveness of the product in regions with very favorable conditions of incidence of downy mildew and in cultures of high economic value (vine). Finally, measurements of the content in grape of resveratrol have been carried out, a compound that indicates the stimulation of the synthesis of phytoalexins in this culture and, simultaneously, a compound of special interest in grape for the human health. 2011-12-07 http://www.plantstress.net/scientific-communications/20th-chilean-congress-of-phytopathology/doc Nutrient deficiency stress produced by the low availability of a nutrient or a nutritional imbalance is one of the main limiting factors in the production and fruit quality. The foliar application of macro and micronutrients with amino acids from enzymatic hydrolysis, natural organic complex, allows contributing with the deficient element in a totally available form, thanks to the bioestimulant properties of the amino acids. Results show an improvement on production in quantity and quality of the fruits, directly affecting the commercial yield of the apricot culture. 2011-11-14 http://www.plantstress.net/scientific-communications/improvement-production-apricot-amino-acids-biostimulants/doc Silicon (Si) has proven effective in controlling both soilborne and foliar fungal diseases in several crops. This study aimed to determine the efficiency of the product Armúrox (Bioibérica, S.A.), a formulation of peptide compounds with Si (PC+Si) to reduce the intensity of rice leaf blast. The spray of PC+Si showed great potential to reduce blast intensity as compared to non-sprayed plants. 2011-08-19 http://www.plantstress.net/scientific-communications/44th-brazilian-phytopathological-meeting/doc Mass trapping techniques have been consolidated as an effective solution to control Medfly Ceratitis capitata (Diptera: Tephritidae) worldwide. One of the reasons for their success is the strong attraction that ammonia odor exerts to the females, which are the damaging fruit agent and the dominant factor for pest multiplication. Among females, it is believed that the youngest are more attracted to proteinic compounds due to the need for an external supply of protein for ovary maturation. With these findings as background, this report further evaluates the influence of the physiological age of the Medfly female on the attraction to two different kinds of mass trapping systems. 2010-10-01 http://www.plantstress.net/scientific-communications/8-international-symposium-fruit-flies/doc Terra-Sorb® is a commercial product based on a mixture of all biologically active L-amino acids which proceed from enzymatic hydrolysis for agriculture use by foliar application (Bioiberica, 2009). Spain is one of the main table grape producers in Europe with excellent cultivars seeded and seedless. Among these, ‘Crimson’ and ‘Autumn Royal’ are within the most cultivated and exported. Although application of amino acids has been evaluated in some crops, there is no scientific information about the role of these natural compounds on the fruit quality and the functional properties, especially resveratrol, during the growth period. In this sense, the objective of this work was to evaluate the effect of a mixture of amino acids, under the trade name of Terra-Sorb®, on Crimson’ and ‘Autumn Royal’ grape cultivars quality and bioactive compounds. 2010-07-07 http://www.plantstress.net/scientific-communications/6-international-table-grape-symposium/doc