Respostas fisiológicas de cultivares de cana-de-açúcar a herbicidas seletivos

Translated title of the contribution: Physiological responses of sugarcane cultivars to selective herbicides

Marcel Tomás Arantes, Andressa Freitas de Lima Rhein, Renata Passos Pincelli, Marcelo de Almeida Silva

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The use of selective herbicides to control weeds has caused different responses in cultivars of sugar cane, and some products affect physiological characteristics and reduce the photosynthetic activity. This study aimed to evaluate the physiological traits in cultivars of sugar cane under the effect of applying post-emergence herbicides. The test was developed in Jau, SP. The experimental design was randomized blocks in factorial scheme 5 x 4 (cultivar x herbicide) with four replications. SP81-3250, RB855156, RB855453, RB867515, IACSP95-5000 were grown in this studied. Herbicides clomazone (1200 g i.a.ha-1); commercial mixture of clomazone + ametryn (1000 + 1500 g i.a.ha-1) and ametryn (3000 g i.a.ha-1) and a control were applied at 30 days after planting. Cultivars IACSP95-5000 and RB867515 were less affected physiologically and can be considered selective to these herbicides. The application of clomazone and ametryn affected negatively the traits maximum photochemical efficiency of photosystem II (Fv/Fm), SPAD index and photosynthetic pigments, but the mixture of these herbicides caused higher reductions, indicating to be the more aggressive to the cultivars.

Translated title of the contributionPhysiological responses of sugarcane cultivars to selective herbicides
Original languagePortuguese
Pages (from-to)1205-1213
Number of pages9
JournalBioscience Journal
Volume29
Issue number5
StatePublished - Sep 1 2013
Externally publishedYes

Keywords

  • Ametryn
  • Chlorophyll
  • Clomazone
  • Phytotoxicity
  • Saccharum spp
  • Selectivity

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