Alternative budburst management in Campanha Gaúcha vineyards

Abstract

Seeking a less toxic alternative to budburst management than hydrogen cyanamide, doses of the mineral-organic product Erger® were tested in combination with calcium nitrate (Ca(NO3)2). The experiment was conducted in Santana do Livramento, southern Brazil, during the 2013/14 and 2014/15 growth cycles, in a ‘Merlot’ vineyard conducted in a vertical trellis system, pruned in double Guyot, with SO4 rootstock. Treatments were: Control (unsprayed); 5.0% Ca(NO3)2; 2.5% Erger® + 5.0% Ca(NO3)2; 5.0% Erger® + 5.0% Ca(NO3)2; 7.5% Erger® + 5.0% Ca(NO3)2; 3.5% Dormex® (positive control). All Erger® treatments stimulated budbreak, increasing budburst from 68% (unsprayed and calcium nitrate means) to 83% (Erger® means) in the first cycle and from 85% to 96% in the second one, with no difference among doses. Plants treated with Dormex® had budburst similar to Erger® in the first cycle (85%), but budburst in the second cycle was only 72%, possibly due to burned buds. Therefore, Erger®, in concentrations of 2.5% or more with 5% calcium nitrate, may be a promising alternative to induce budburst in regions with restrictions in cold availability.

Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

“…In agreement with these results, it has been observed in grapevine that, under subtropical conditions, plants sprayed with an Erger ® solution, and plants treated with hydrogen cyanamide (3.5–4.5%) solutions present similar vegetative bud break rates ( Fowler et al, 2020 ). Even so, both Erger ® and hydrogen cyanamide treatments exhibited a higher budburst (10–15%) than the control treatment ( Fowler et al, 2020 ; Rosa et al, 2020 ).…”

“…Different works in apple demonstrated that high concentrations of Erger R (5, 6, and 7%) were more efficient in advancing flowering time and increasing production (Hawerroth et al, 2010;Pasa et al, 2018). On the other hand, studies in grapevine and blackberry found no differences between low and high concentrations of Erger R solutions in terms of flowering time, fruit ripening or production (Segantini et al, 2015;Rosa et al, 2020). Similarly, in apple, no dissimilarities were observed between trees treated with 1 and 2% Syncron R solutions (Petri et al, 2016).…”

Dormancy breaking of ‘Kampai’ peach trees with alternative products in subtropical regions

“…Increased budding and uniformity of budding have been observed in ‘Imperial Gala’, ‘Suprema’ and ‘Fuji’ apple trees when applying the organomineral fertilizer Erger G ® and hydrogen cyanamide (Hawerroth et al ., 2010 b ). An increase was reported in the formation of shoots in grapevines that received Erger G ® compared to water only (Rosa et al ., 2020). Thus, Erger G ® can increase the budding capacity in apple and grapevines, as observed here in the ‘Kampai’ peach tree.…”

Influencia del ácido giberélico (AG3), etanol y cianamida hidrogenada (Dormex) sobre la brotación de yemas a partir de tubérculos de Solanum tuberosum L. var. Cecilia.

“…La cianamida hidrogenada funciona en algunos frutales acorde con las condiciones específicas de temperatura y humedad que prevalezcan (bajas temperaturas y periodos de humedad prolongados), y su eficacia puede verse reducida si no se cumplen estos requisitos óptimos 34 . Si las condiciones ambientales no fueron favorables durante la aplicación de Dormex, es posible que no se haya observado un aumento significativo en el número de brotes 35 .…”