Eficiência fotossintética da cana-de-açúcar após a aplicação dos herbicidas S-metolachlor e atrazine em pós-emergência

Revista Brasileira de Herbicidas

Rosilaine Araldi¹  Samir Paulo Jasper¹  Caio Antônio Carbonari¹  Giovanna Larissa G. C. Gomes¹  Marcelo Girotto²  Edivaldo Domingues Velini¹ 

[1] Unesp-Botucatu

关键词: fluorômetro;    s-metolachlor;    atrazine;    seletividade;    controle químico;   

DOI  :  

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

The objective of the work was to evaluate the photosynthetic efficiency through electrons transport rate in sugar cane crop, after S-metolachlor and atrazine herbicides application in post-emergence. For planting sugar cane cuttings (SP80-3280 genotype), vases with 8 dm3 capacity were used for atrazine and S-metolachlor application. Application was performed through a stationary sprayer installed in laboratory and after treatments application, plants were transported to a green house and kept until the end of the study. Reading of electrons transport rate (ETR) in the middle portion of sugar cane young leaves, with a portable fluorometer (Yield protocol) in intervals of 01, 04, 24, 48, 72 and 96 hours after application were conducted. Results demonstrated that SP80-3280 sugar cane genotype presented satisfactory selectivity to herbicides applied in post-emergence conditions, outstanding atrazine. Greatest reductions in ETR and phytointoxication were detected with S-metolachlor herbicide, with the use of fluorometer being considered an alternative and complementary methodology to evaluate herbicides selectivity.

【 授权许可】

Unknown