Chlorosis
Mostrando 13-24 de 189 artigos, teses e dissertações.
-
13. Main viruses in sweet cherry plantations of Central-Western Spain
Sweet cherry trees (Prunus avium L.) are susceptible to a range of diseases, but there have been no studies to date about the viral infection of sweet cherry trees in Spain. To determine the phytosanitary status of Spanish sweet cherry plantations, the incidence and leaf symptoms induced by Prune dwarf (PDV), Prunus necrotic ringspot (PNRSV) and Apple chloro
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-02
-
14. High incidence of Tomato chlorosis virus alone and in mixed infection with begomoviruses in two tomato fields in the Federal District and Goiás state, Brazil
Tomato chlorosis virus (ToCV), a species in the Crinivirus genus, was first reported in tomatoes in Brazil (state of São Paulo) in 2008. This was followed by reports in several other Brazilian states. Tomato plants with chlorotic spots and leaf roll symptoms are frequently observed in tomato fields with high whitefly populations in Central Brazil. These pla
Trop. plant pathol.. Publicado em: 2014-12
-
15. Serological Identification of Virus in Watermelon Production Fields in the Tocantins State
Watermelon (Citrullus lanatus) cultivated in almost all tropical and subtropical regions of the world, has its largest output in China, and then, according to FAO data, Turkey, Iran and Brazil, being one of the main crops cultivated in State of Tocantins, Brazil. In this work was investigated the occurrence and distribution of the watermelon viruses, totalin
Braz. arch. biol. technol.. Publicado em: 11/11/2014
-
16. Enhanced biosynthesis of quercetin occurs as A photoprotective measure in Lycopersicon esculentum mill. under Acute UV-B exposure
Lycopersicon esculentum respond to UV-B by enhanced synthesis of flavonoid quercetin, a strong antioxidant that helps the plants to well acclimatize to UV-B stress. Three weeks old plants of L. esculentum were subjected to acute UV-B irradiation for 20, 40 and 60 minutes daily until 28 days and analyzed for the morphological and biochemical changes. UV-B exp
Braz. arch. biol. technol.. Publicado em: 2014-06
-
17. Slow wilt: another form of Marchitez in oil palm associated with trypanosomatids in Peru
Another form of Marchitez manifestation affecting oil palm (Elaeis guineensis) has been observed since 2002 in the Alto Huallaga area from Peru. Externally, the disease appears as chlorosis, drying and breaking of the lower leaves, rot in fruit bunches, accumulation and rot of spears. Internally, the meristem presents brown lesions with a yellowish halo arou
Trop. plant pathol.. Publicado em: 2013-12
-
18. The wild type of Momordica charantia is not infected by potyviruses that cause disease in papaya and cucurbit crops
In the present work, the susceptibility of wild and domesticated plants of Momordica charantia to viruses from the genus Potyvirus that cause diseases in papaya (Carica papaya) and cucurbit crops was evaluated. The plants were subjected to experimental and natural infection with Papaya ringspot virus types P and W (PRSV-P and PRSV-W) and Zucchini yellow mosa
Trop. plant pathol.. Publicado em: 27/08/2013
-
19. Molecular characterization reveals Brazilian Tomato chlorosis virus to be closely related to a Greek isolate
Tomato chlorosis virus (ToCV, genus Crinivirus, family Closteroviridae) is a whitefly-transmitted crinivirus with a bipartite RNA genome. This virus is emerging as a serious threat to tomato crops worldwide. To date, only three complete genomic sequences of ToCV have been described from North America, Spain, and Greece isolates. In this study, we present the
Trop. plant pathol.. Publicado em: 26/07/2013
-
20. Tomato severe rugose virus (ToSRV) e Tomato chlorosis virus (ToCV): relações com a Bemisia tabaci biótipo B e eficiência de um inseticida no controle da transmissão do ToSRV / Tomato severe rugose virus (ToSRV) and Tomato chlorosis virus (ToCV): relashionship with Bemisia tabaci biotype B and efficiency of an insecticide to control the transmission of ToSRV
A cultura do tomateiro (Solanum lycopersicum L.) é importante mundialmente devido ao alto consumo de seus frutos. Nos últimos anos surgiram nesta cultura no Brasil alguns vírus emergentes com altas taxas de disseminação, como begomovírus e crinivírus, transmitidos pela Bemisia tabaci biótipo B, que podem causar danos à produção do tomateiro. A esp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2012
-
21. Pirossequenciamento e análise comparativa de genomas do fitopatógeno Xylella fastidiosa / Pyrosequencing and comparative analysis of Xylella fastidiosa genomes
Xylella fastidiosa é uma bactéria Gram-negativa, do subgrupo das Gama-Proteobactérias, não-flagelada, que coloniza o xilema de diversas plantas cultivadas e silvestres, podendo ser causadora de doenças. Sua disseminação é feita por insetos conhecidos como cigarrinhas. Genomas de cepas de X. fastidiosa isoladas de distintos hospedeiros já foram seque
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
-
22. Nimbya alternantherae reported for the first time to cause leaf and stem necrosis of Alternanthera philoxeroides (alligatorweed) in Pakistan
A severe leaf and stem necrosis disease of Alternanthera philoxeroides (alligatorweed) was examined in the summer of 2011. Symptoms on leaves and stems of A. philoxeroides consisted of round to oval straw colored spots with maroon margins resulting in chlorosis, severe defoliation and withering of stems. The causal pathogen isolated on V-8 agar medium was mo
Trop. plant pathol.. Publicado em: 2012-12
-
23. Dinâmica temporal e espacial da virose causada por Tomato chlorosis virus (ToCV) em tomateiro / Temporal and spatial dynamics of the viral disease caused by Tomato chlorosis virus (ToCV) in tomato
O ToCV é um vírus pertencente à família Closteroviridae, gênero Crinivirus, que ataca plantas de tomate, entre outros hospedeiros, nas principais regiões produtoras do mundo. O vírus é transmitido exclusivamente pela mosca branca, de forma semi-persistente, sendo o biótipo B da Bemisia tabaci o principal vetor, devido à sua distribuição nas zonas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
-
24. Comparative analysis for quantification of Citrus Variegated Chlorosis in the field
Citrus Variegated Chlorosis (CVC) caused by Xylella fastidiosa is one of the most important diseases for Brazilian citriculture. The CVC is a vascular disease with a long incubation period and symptoms similar to other disorders, and this factors difficult the CVC quantification in the field. Two methods of CVC assessment were compared in this study. The fir
Scientia Agricola. Publicado em: 2011-10