Yield and quality of the Tetsukabuto squash fruits induced with 2,4-D doses under dry conditions

Abstract

Squashes and pumpkins are known and grown worldwide, including the Tetsukabuto type, a hybrid of Japanese origin. On this work, we evaluated yield and quality of parthenocarpic fruits of hybrid Tetsukabuto developed with the use of 2,4-D doses, in the climatic conditions of the Brazilian semiarid, in the city of Pombal, state of Paraíba, Brazil. The experiment was carried out from February to May 2013, in complete blocks at random and five replications. Treatments corresponded to five 2,4-D doses (0, 90, 180, 270, and 360 mg/L) applied to female flowers, and a control treatment, where fruits developed out of insect pollinated flowers. We evaluated number of flowers per plant, duration of flowering, number of fruits per plant (used to estimate number of fruits per hectare), fruit set index, fruit mass and transversal and longitudinal diameters, pulp thickness and content of soluble solids, total fruit production and yield. Number of fruits per plant and fruit mass increased 269.5 and 15.4%, respectively, with 212.1 mg/L and 360.0 mg/L of 2,4-D, when compared to the control treatment. Increasing the 2,4-D dose from 0.0 to 241.4 mg/L resulted in 38.2% rise in plant production. Correlations were significant only for number of flowers x number of fruits per plant (NF) and NF x yield, with coefficients of 87.5 and 82.7%, respectively. These results indicate that fruit induction using 2,4-D resulted in higher fruit set, independent of the 2,4-D dose applied.

Vermicomposta, auxinas sintéticas y producción de calabacita (Cucurbita pepo L.) en invernadero

“…La utilización de f itorreguladores de origen sintético, de composición análoga a las hormonas elaboradas por la propia planta inducidas por la polinización, es una alternativa empleada para promover el cuaje y producción de frutos partenocárpicos en invernadero sin empleo de insectos polinizadores (Ayala-Tafoya et al, 2012). Varios f itorreguladores comercializados con ese propósito, son formulados con base en auxinas: ácido indolacético, ácido 4-clorofenoxiacético, ácido naftalenacético y ácido 2,4-diclorofenoxiacético (Jankiewics y Acosta-Zamudio, 2003), y utilizados en melón (Li et al, 2002), sandía (Citrullus lanatus) (Maroto et al, 2005), pepino (Hikosaka and Sugiyama, 2015) y calabaza (Martínez et al, 2013;Queiroga et al, 2017).…”

Viabilidade econômica da produção de abóbora cabotiá para agricultura familiar em Iporá, Goiás

“…São alimentos fonte de fósforo, ferro, vitaminas do complexo B, cálcio, provitaminas A, retinol e carboidratos. Do cruzamento entre linhagens selecionadas de morangas e abóboras, desenvolveu-se no Japão a "Tetsukabuto", cuja tradução significa "capacete de ferro", devido seus frutos apresentar coloração de cor verde escura e formato arredondado (Queiroga et al, 2017).…”

“…Em regiões de clima tropical e com baixa altitude, o plantio pode ser feito o ano todo. Esta cultura possui um amplo acesso aos canais de comercialização, podendo ser comercializadas em feiras livres, supermercados, quitandas, programas governamentais (PAA e PNAE), e nos canais de distribuições como: CEASA, os quais podem ser ofertados os frutos in natura (inteiro) ou mesmo processados em cortes e embalados (Queiroga et al, 2017;Sediyama et al, 2009).…”