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Copyright of Revista Ciencia y Tecnología Agropecuaria is the property of Agrosavia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of this work was to assess the effects of phenological stage, wilting and a microbial inoculant on chemical composition, organic acids concentration and ruminal degradability of dry matter (DMRD) of alfalfa silage. The pasture was cut in two phenological stages: 10 % (F10) and 50 % (F50) of flowering, and the material was divided into two fractions: with wilting (W) and without wilting (NW). Each fraction was chopped and sprayed with an inoculant (Lactobacillus plantarum, 5 × 109 viable cells/g, I) or with distilled water (no inoculant, NI) and ensiled in PVC microsilos, with 6 replications per treatment. After 90 days, pH, dry matter (DM), crude protein (CP), ammonia nitrogen (NH3-N), neutral detergent fiber (NDF) and acid detergent fiber (ADF), DMRD at 30 h, acetic (C2), propionic (C3), butyric (C4) and lactic (LA) acids were determined. The wilting process decreased pH, NH3-N, NDF and ADF, and increased CP of the silage. In F10, wilting decreased the concentration of C2, C3 and C4, and increased LA. In F50, wilting decreased the C2 concentration at the two levels of inoculant, and only when inoculant was not applied, wilting decreased C3 and C4, and increased LA. In F50-NW the application of inoculant decreased the content of C2, C3 and C4, and increased LA. The DMRD of W was higher than NW, and it was higher in F10 vs F50 only when wilting was applied. The inoculant application decreased the NDF content, and in F50 it decreased NH3-N level. It can be concluded that the use of wilting improves the nutritional quality of alfalfa silage, while the effect of L. plantarum is limited to some combinations of treatments. [ABSTRACT FROM AUTHOR]

Chili pepper (Capsicum annum L.) is a crop of great importance in Peru, because the country is the second largest exporter worldwide. Currently it is reported a decrease in its yield, related to diseases caused by fungi such as Fusarium spp., Phytophthora capsici and Rhizoctonia solani; the genus Fusarium is the one that occurs most frequently. Taking into account the importance of the cultivation of chili pepper in the country, this work aims to isolate and morphologically identify Fusarium oxysporum from the roots of chili pepper from the producing areas of the district of Barranca. Samples of chili with symptoms of wilting and root rot were collected from the areas of Santa Elena and Vinto in the district of Barranca. The samples were cut transversally 1 cm long and were disinfected superficially, then they were planted in PDA medium. The mycelia presented were isolated for their purification in flasks with PDA medium and then transferred to Petri dishes with PDA medium to observe the pigmentation of the colony and the growth rate; while in SNA and CLA media to observe microconidia, macroconidia and chlamydospores. We achieved the isolation and morphological identification of 22 isolates of F. oxysporum from the roots of chili from the producing areas of the district of Barranca, representing 61.11% of the isolates that presented characteristics of the genus Fusarium, which are related to the wilting and death of these crops, which leads to great economic losses. [ABSTRACT FROM AUTHOR]

Copyright of Agro Productividad is the property of Colegio de Postgraduados and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)