Silicon ameliorates wheat technological quality under biotic stress.

Abstract: Silicon applied in the soil is an alternative for wheat disease management, but there is no information about its effects on wheat technological quality. For this purpose, we collected wheat grains from plants of two cultivars differentially susceptible to diseases, grown in soil amended or not with silicon, and treated or not treated with fungicide. The results showed that greater severity of tan spot (Pyrenophora tritici-repentis) and Fusarium head blight (Fusarium graminearum species complex) compromised the grain quality and negatively altered wheat flour color, gluten levels, and the alveograph and farinograph parameters. Silicon fertilization had little effect on the wheat technological quality under lower disease intensity, but under higher disease intensity, it reduced the damage caused by pathogens, directly or indirectly influencing the flour yield, grain falling number, gluten strength, dough tenacity and tenacity/extensibility ratio, and elasticity index. The results of this study show for the first time the effect of silicon fertilization on wheat technological quality as a feasible alternative for inclusion in integrated disease management of wheat to maintain flour quality despite biotic stress. Resumo: O silício aplicado ao solo é uma alternativa para o manejo de doenças do trigo. Foram empregadas duas cultivares de trigo diferencialmente susceptíveis a doenças, cultivadas em solo corrigido ou não com silício e tratadas ou não com fungicida. Os resultados mostraram que a maior severidade da mancha bronzeada (Pyrenophora tritici-repentis) e da giberela (complexo de espécies Fusarium graminearum) comprometeu a qualidade do grão e alterou negativamente a cor da farinha de trigo, os teores de glúten e os parâmetros alveográficos e farinográficos. A adubação com silício teve pouco efeito na qualidade tecnológica do trigo (QTT) sob menor intensidade de doença, mas sob maior intensidade de doença, reduziu os danos causados por patógenos, influenciando direta ou indiretamente no rendimento de farinha, número de queda do grão, força de glúten, tenacidade da massa, relação tenacidade/extensibilidade e índice de elasticidade. Os resultados deste estudo mostram pela primeira vez o efeito da adubação com silício na QTT como alternativa viável para inclusão no manejo integrado de doenças do trigo para manter a qualidade da farinha apesar do estresse biótico

Reação de cultivares de forrageiras de verão a Meloidogyne javanica e M. incognita.

Objetivou-se, neste estudo, caracterizar a reação cultivares de forrageiras de grande importância econômica na rotação, adaptadas ao centro sul do Rio Grande do Sul, quanto a resistência/suscetibilidade perante Meloidogyne incognita e M. javanica

Prevalence of STDs among prostitutes in Czech border areas with Germany in 1997–2001 assessed in project "Jana"

Objectives: To prevent STDs, including HIV/AIDS, and assessment of STD prevalence in the target group. Methods: Prostitutes working in night clubs and in the streets and roads of three districts in the West Bohemian Region of the Czech Republic bordering on Germany were studied. Interactions included street work, venereology check up, psychology and sociology counselling, psychological preparation on possible treatment, and continuous and regular contact. Results: The number of "love clubs" involved in project "Jana" increased from 46 in 1997 to 72 in 2000. Of 561 street girls registered in the project during 1997–2001, there was one HIV positive, every 11th prostitute had syphilis, and one in 93 women had gonorrhoea, whereas incidence of syphilis in the Czech Republic was 10.2/100 000 and that of gonorrhoea 9.5/100 000 inhabitants in 2001, 31 women had Chlamydia trachomatis urinary tract and genital infection, and 25 were HBsAg positives. STD frequency revealed in project participants significantly exceeds numbers of STDs in the other inhabitants of the Czech Republic. The majority of prostitutes were foreigners, mostly Ukrainians and Russians. Conclusion: The situation in the border areas is alarming. The priority must be to concentrate efforts on prevention of spread of venereal diseases in borders of economically disparate states

First report of powdery mildew caused by Erysiphe quercicola on curly dock (Rumex crispus) in Brazil.

Made available in DSpace on 2019-05-07T00:51:08Z (GMT). No. of bitstreams: 1 DornelesetalPlantDesease.pdf: 548943 bytes, checksum: 25ace986d1dd14debabe8f860d514a7a (MD5) Previous issue date: 2019bitstream/item/196987/1/Dorneles-et-al-Plant-Desease.pd

First report of powdery mildew caused by Erysiphe quercicola on curly dock (Rumex crispus) in Brazil.

Made available in DSpace on 2019-05-07T00:51:08Z (GMT). No. of bitstreams: 1 DornelesetalPlantDesease.pdf: 548943 bytes, checksum: 25ace986d1dd14debabe8f860d514a7a (MD5) Previous issue date: 2019bitstream/item/196987/1/Dorneles-et-al-Plant-Desease.pd