ISSN 0100-8358 versão impressa
ISSN 1806-9681versão online

INSTRUCTIONS TO AUTHORS

• Scope and policy
• Form and preparation of manuscripts

Planta Daninha is a scientific journal published by the Brazilian Weed Science Society (SBCPD).
The articles submitted to publication can be sent only through the electronic system, in the site http://www.scielo.br/pd, clicking in "Submissão online".

It will be accepted the articles written in Portuguese, English or Spanish, reviewed and approved by the Editing Commission and that neither have been published nor submitted to publication in another vehicle. The exceptions, about this last limitation, are the ones that have been presented in congresses, as an abstract. The author who sends the article must be responsible for the other ones, if there are.

Authors should type in the "Comments to the Editor" a cover letter presenting the work and explaining the main contribution to the Weed Science. The letter should indicate that the work was not submitted for publication elsewhere.

Articles and reviews should not exceed 25 pages (A4 paper with margins of 3 cm, font Times New Roman size 12, pages and lines numbered sequentially), including tables and figures. The Research Notes should not exceed 12 pages, including tables and figures.

The text should be typed into the Word (Microsoft) program and 1.5 spacing. The main divisions of the text (Introduction, Methods, and Results and Discussion) should be in uppercase and bold, and centered on the page. Scientific notes do not have divisions.

The title of the manuscript must reflect the content of the work and should not have subtitles, abbreviations, formulas and symbols. The scientific name must be indicated in the title only if the species is unknown.
The names of the author and co-authors should be included in the Submission System in the same order they appear in the final work. Please, do not indicate the authorship of the work in the text of the manuscript.
The abstract must have the goal of the research clearly and concisely, the methods briefly and the most relevant results and conclusions. The text should not exceed 250 words with short sentences with complete connection with each other. It must not contain references. The title and abstract in Portuguese should be faithful versions of the text in English.

The key words in English and Portuguese should not repeat title words and should include the scientific name of species. Words must be separated by a comma and begin with small letters, including the first term. The authors should present from 3 to 6 terms, considering that a term may be composed of two or more words.
The Introduction should have one to two pages, include the rationale for conducting the work, placing the importance of the scientific problem. The information contained in the Introduction should be sufficient to establish the hypothesis of the research. The authors should cite recent studies published in scientific journals, but the citation of classical works is accepted. The authors should avoid the citation of summaries and abstracts. In the last paragraph of the Introduction, the authors must submit a scientific hypothesis and the objective of the study, the same as the summary.

Material and Methods should present a description of the experimental conditions and methods used so that there is enough information to repeat the work. Formulas, expressions, or mathematical equations should be initiated to the left of the page. Include references to statistical analysis and report about the transformation of the data. Indication of statistical significance should be as follows: p <0.01 or p> 0.05 ("p" in lower case).
In Results and Discussion, the authors should present the research results and discuss them in order to relate the variables examined to the objectives of the study. The mere comparison of results with the data presented by other authors did not characterize the discussion of them. The authors should avoid excessive speculation and the data should not be presented both in tables and figures.

There will be no extra chapter for Conclusions, but the authors may finish the chapter "Results and Discussion" with a summarized conclusion.

Only the strictly necessary references for the understanding of the article should be cited, we recommend around 25 references to articles and scientific notes. The list of references should begin on a new page.

The author citations in the text should be in small caps, followed by year of publication. For two authors, use "and". Having more than two authors, cite the last name first, followed by et al. More than one article of the same authors, in the same year, must be indicated with small letters: Silva et al. (2008a, b). Personal communications, or unpublished reports should be cited in footnotes. They should not appear in References. The citation of papers published in scientific events should be avoided.

References are normalized according to the models bellow and should be in alphabetical order and chronological order of the year; having two or more authors, separate them by semicolons; the titles of journals should be spelled out and include only the works cited in the text, tables and / or figures, as follows:

a)Periodic:
TUFFI SANTOS, L.D. et al. Exsudação radicular de glyphosate por Brachiaria decumbens e seus efeitos em plantas de eucalipto. Planta Daninha, v.26, n.2, p.369-374, 2008

b)Books and book chapters
Should be avoided.
SENSEMAN, S. A. Herbicide handbook. 9. ed. Lawrence: Weed Science Society of America, 2007. 458 p.

c)Dissertations and Theses
Should be avoided. Look forward referring only the articles published in whole, in indexed publications. Only very recent thesis, whose articles have not yet been published, should be cited.
RIBEIRO, D. N. Caracterização da resistência ao herbicida glyphosate em biótipos da planta daninha Lolium multiflorum (Lam.). 2008. 102 f. Dissertação (Mestrado em Fitotecnia) - Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, 2008.

When absolutely necessary to the understanding of the work, tables and figures should be shown in the text. The table or figure and its respective caption should be self-explanatory. The titles of tables and figures should be clear and complete and include the name (common or scientific) of the species and the dependent variables. Figures should appear at the end of the text. We considered figures: graphs, drawings, maps and photographs used to illustrate the text. Authors should avoid colors in the figures, except for photographs. For composite figures, each graph should be marked with the inscription "(a, b, c...)" in lowercase.

Tables and figures should be placed after the listing of references. The numbers in the tables should be aligned with the comma in the column. Figures and tables must be accompanied by its caption, with the units following the International System of Units and positioned at the top of the columns in the tables. The magnitudes, in case of compound units, should be separated by space and an indication of the denominators must be rated in superscript. Examples: (µmol m^-2 s^-1), [mg (g MS)^-1].

IMPORTANT RECOMMENDATIONS:

- Not to mention the lab, department, center or university where the research was conducted.
- In the online submission of work, the names of the author and co-authors must be entered into the System in the same order they appear in the final work. Do not indicate the authorship of the work in the text of the manuscript.
- Failure to standards will require the return of work.

Cost for publication
The cost of publication written in portuguese is R$ 70,00 per article up to (06) six printed pages, R$ 95,00 (seven pages), R$ 130,00 ( eight pages), R$ 180,00 ( nine pages), R$ 250,00 (ten pages) and, over tem pages, R$ 100,00 per extra page. The author in charge shall make a payment in the following bank account: SBCPD - Sociedade Brasileira da Ciência das Plantas Daninhas (Banco do Brasil, AG 1212-2, C/C 36107-0) and send a copy of the payment (via fax or e-mail), mentioning the number of identification from the article.