Flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application

Abstract

This work focuses on the evaluation of flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application under field conditions with low temperatures during the winter. Two-years-old olive plant variety Grappolo 575, were submitted to light pruning, removing apical dominance, before treatments application. The treatments were organized in a 4×2 factorial scheme, respective to four PBZ concentrations tested: 0, 200, 400 and 800 mg L-1 of PBZ and two plants groups, with and without pruning, in randomized block with four replications. Paclobutrazol concentrations tested did not affect the olive tree flowering. The plant vegetative growth was reduced until 60 days after paclobutrazol application. Pruning resulted in stimulation of emission of vegetative shoots and reduction of flowering.Key words: Floral induction, growth regulators, management, Olea europaea L. resuMoCom o objetivo de avaliar o florescimento e o crescimento vegetativo da oliveira em plantas submetidas à poda e a aplicação do paclobutrazol foi conduzido um experimento em condições de campo com ocorrência de baixas temperaturas durante inverno. Plantas da variedade Grappolo 575, com dois anos de idade, foram submetidas a uma poda leve, retirando-se a dominância apical, antes da aplicação dos tratamentos, no mês de abril de 2009. Para a distribuição dos tratamentos, adotou-se o esquema fatorial 4×2, referente às quatro concentrações de paclobutrazol testadas e dois grupos de plantas, com e sem poda, em blocos casualizados com quatro repetições. As concentrações de paclobutrazol testadas não influenciaram no florescimento da oliveira. O crescimento vegetativo foi retardado até 60 dias após a aplicação do paclobutrazol. A poda estimulou a emissão de brotações vegetativas e reduziu o florescimento. palavras-chave: Indução floral, reguladores de crescimento, manejo, Olea europaea L.

Effect of Shoot Pruning Interval and Dosage of Potassium Fertilizer on Growth and Yield of Yam Bean (Pachyrhizus Erosus L.)

“…The plant growth increased as the severity of pruning increased, but the fruit set, and yield decreased Albarracín et al (2017). Pruning resulted in stimulation of emission of vegetative shoots and reduction of flowering Cruz et al (2011). The leaf nutrient status was also affected by the different pruning intensities.…”

The different dissipation behavior of chiral pesticide paclobutrazol in the brine during Chinese cabbage pickling process

“…[1][2][3][4] Most chiral pesticides are sold as the racemic mixture for some limitations, 5 and only 7% chiral pesticides are marketed as the pure isomer or as an enriched mixture of the active isomer, 6 such as S-metolachlor. [14][15][16][17] Some studies have demonstrated that racemic form and two enantiomers of paclobutrazol have different activity in fungicidal and plant growth. The study on the chiral pesticide is so important that recently there are many researches about the stereoselective behavior.…”

“…13 Paclobutrazol has been used widely in agricultural production to delay growth period, inhibit stem elongation, shorten internode, promote bud differentiation, enhance plant resistance, and increase yield. [14][15][16][17] Some studies have demonstrated that racemic form and two enantiomers of paclobutrazol have different activity in fungicidal and plant growth. 12 R-PBZ had the higher fungicidal activity, but S-PBZ was more active as a plant growth regulator.…”