Imazamox selectivity for alfalfa crop

Abstract

The selectivity of imazamox (commercial formulations Sinamon and Pulsar-40) for alfalfa was tested during the vegetation season of 2016. The trials were conducted at two locations, Boljevci and Kovilovo, using a completely randomized block design, with four replications. Commercial formulations were used at the maximum recommended doses and twice the recommended doses. Visual assessments of potential phytotoxicity were performed twice, in two weeks intervals following the herbicide application. In the first assessment, phytotoxicity symptoms (mild chlorosis of plants) were observed only at the Boljevci location, in treatments with the recommended dose. The higher (double) doses induced a more pronounced chlorosis, but the level of phytotoxicity did not exceed 10%. At the time of the second assessment, there were no symptoms of phytotoxicity in either location. There were no statistically significant differences with regards to the quantitative yield parameters (fresh weight of the yield, dry forage yield and the content of weeds in the green mass) and qualitative yield parameters (dry matter content, protein content and chemical quality indices of composite samples), in either location.

Tokom 2016. godine izvedena su ispitivanja selektivnosti primene imazamoksa (preparata Sinamon i Pulsar-40) u usevu lucerke. Ogledi su postavljeni na dva lokaliteta, Boljevci i Kovilovo, po potpuno slučajnom blok sistemu u četiri ponavljanja. Ispitivani preparati primenjeni su u maksimalno preporučenim i dvostruko većim količinama primene. Vizuelne ocene eventualnih simptoma fitotoksičnosti obavljene su dve i četiri nedelje od momenta primene herbicida. U prvoj oceni, simptomi fitotoksičnosti (u vidu blage hloroze), utvrđeni su samo na lokalitetu Boljevci pri maksimalno preporučenim količinama primene. Dvostruko veće količine primene izazvale su nešto intezivniju hlorozu, pri čemu nivo fitotoksičnosti nije prešao 10%. U drugoj oceni, ni na jednom od lokaliteta, nisu bili vidljivi simptomi fitotoksičnosti. Za kvantitativne pokazatelje prinosa (prinos sveže mase, prinos suvog sena i sadržaj korova u zelenoj masi) i kvalitativne pokazatelje prinosa lucerke (sadržaj suve materije, sadržaj sirovih proteina i hemijski pokazatelji kvaliteta kompozitnih uzoraka) nije utvrđen statistički značajan uticaj imazamoksa ni na jednom od lokaliteta.