Effects of alternatives to hydrogen cyanamide on commercial ‘Hayward’ kiwifruit production

Hernández, Gustavo; Craig, Rob

doi:10.17660/actahortic.2016.1130.19

Cited by 12 publications

(9 citation statements)

References 16 publications

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“…In 'Fuji Suprema', in 2018/2019, all treatments showed lower fruit set, with no differences between them, in relation to the control treatment. According to Hernandez and Craig, [20] in certain situations, a drastic reduction in fruit set can be achieved by using bud break promoters, due to the nutritional competition established between vegetative and reproductive drains.…”

Section: Resultsmentioning

confidence: 99%

“…In 'Fuji Suprema', in 2018/2019, all treatments showed lower fruit set, with no differences between them, e control treatment. According to Hernandez and Craig, [20] in certain situations, a drastic reduction in fruit set can be achieved by using bud break promoters, due to the nutritional competition established between vegetative and the production per plant, the treatment MO 3.5% + TDZ 0.02% presented higher production in relation to the other treatments in the 2018/19 and 2019/20 seasons, in the two cultivars (Table 5). In 2017/18 there were no significant ents, in Cv.…”

Section: Fig 1 Evolution Of the Phenological Stages Of The 'Maxi Gala' And 'Fuji Suprema' Apple Treementioning

confidence: 92%

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Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Petri¹,

Sezerino²,

Fenili

et al. 2021

JEAI

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Aims: This work aims to evaluate the efficiency of Revent® 500 SC (Thidiazuron) concentrations as a bud breaker promoter in apple trees, cv. Maxi Gala and Supreme Fuji, through phenology, sprouting of buds, fruit set and production per plant. Place and Duration of Study: The experiments were carried out in southern Brazil, municipality of Caçador / SC, during the seasons from 2017 to 2019, in the cultivars Fuji Suprema and Maxi Gala / Marubakaido / M9. Methodology: The treatments were 1. Control (without application); 2. Mineral Oil (MO) 3.5% + Hydrogenated Cyanamide (HC) 0.35%; 3. MO 3.5% + HC 0.5%; 4. MO 3.5% + Thidiazuron (TDZ) 0.005%; 5. MO 3.5% + TDZ 0.01%; 6. MO 3.5% + TDZ 0.015%; 7.MO 3.5% + TDZ 0.02%; 8.MO 3.5% + TDZ 0.025%, applied in stages B and C. Several variables were evaluated such as phenology, sprouting of axillary and terminal buds, fruit set, production per plant and average fruit mass. Results: All treatments with bud breakers advanced the phenological stages in relation to the control in the three years. In the sprouting of the axillary and terminal buds, all treatments were superior to the control. TDZ treatments showed higher sprouting of axillary buds in 2017/18 compared to standard treatments with hydrogenated cyanamide. In plant production, the treatment MO 3.5% + TDZ 0.02% was higher than the other treatments in the 2018/19 and 2019/20 seasons, in both cultivars. TDZ associated with mineral oil is efficient in inducing the sprouting of ‘Maxi Gala’ and ‘Fuji Suprema’ apple trees and can be used to recover sprouts from previous years.

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Section: Resultsmentioning

confidence: 99%

Section: Fig 1 Evolution Of the Phenological Stages Of The 'Maxi Gala' And 'Fuji Suprema' Apple Treementioning

confidence: 92%

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Petri¹,

Sezerino²,

Fenili

et al. 2021

JEAI

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“…Several works in kiwi, pistachio ( Pistacia vera L.), apple and Prunus spp. have indicated that the optimal concentration of agrochemicals like Armobreak™ and mineral oil is 3% ( Erez and Zur, 1981 ; Küden et al, 1995 ; Sagredo et al, 2005 ; Erez et al, 2008 ; Petri et al, 2014 ; Botelho et al, 2016 ; Hernández and Craig, 2016 ). Nevertheless, these products have not solved the problems linked to the promotion of endodormancy release.…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

“…Erger ® has also been used to promote endodormancy release in kiwi. Under cold winter conditions, kiwi trees treated with an Erger ® (6%) solution presented a higher flower bud break rate than those treated with a hydrogen cyanamide solution (5%) ( Hernández and Craig, 2016 ). In contrast to Erger ® , the Syncron ® + NitroActive ® treatment has not yet been found to produce an earlier endodormancy release in this species.…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

2022

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Endodormancy in temperate fruit trees like Prunus is a protector state that allows the trees to survive in the adverse conditions of autumn and winter. During this process, plants accumulate chill hours. Flower buds require a certain number of chill hours to release from endodormancy, known as chilling requirements. This step is crucial for proper flowering and fruit set, since incomplete fulfillment of the chilling requirements produces asynchronous flowering, resulting in low quality flowers, and fruits. In recent decades, global warming has endangered this chill accumulation. Because of this fact, many agrochemicals have been used to promote endodormancy release. One of the first and most efficient agrochemicals used for this purpose was hydrogen cyanamide. The application of this agrochemical has been found to advance endodormancy release and synchronize flowering time, compressing the flowering period and increasing production in many species, including apple, grapevine, kiwi, and peach. However, some studies have pointed to the toxicity of this agrochemical. Therefore, other non-toxic agrochemicals have been used in recent years. Among them, Erger® + Activ Erger® and Syncron® + NitroActive® have been the most popular alternatives. These two treatments have been shown to efficiently advance endodormancy release in most of the species in which they have been applied. In addition, other less popular agrochemicals have also been applied, but their efficiency is still unclear. In recent years, several studies have focused on the biochemical and genetic variation produced by these treatments, and significant variations have been observed in reactive oxygen species, abscisic acid (ABA), and gibberellin (GA) levels and in the genes responsible for their biosynthesis. Given the importance of this topic, future studies should focus on the discovery and development of new environmentally friendly agrochemicals for improving the modulation of endodormancy release and look more deeply into the effects of these treatments in plants.

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“…A partir da década de 80, o óleo mineral (OM), a cianamida hidrogenada (CH) e a associação de ambos tornaram-se os produtos mais utilizados na indução da brotação das fruteiras de clima temperado (HAWERROTH et al, 2010). Uma nova geração de produtos foi desenvolvida a partir dos anos 2000, devido às restrições de uso da cianamida hidrogenada, que possui alta toxicidade (HERNÁNDEZ & CRAIG, 2011). Novas moléculas, que apresentam em sua composição nitrogênio inorgânico, aminoácidos, polissacarídeos, ácido glutâmico e nutrientes minerais, como Erger ® , Syncron ® , Thidiazuron (TDZ), Siberio ® e Bluprins ® , em mistura com nitrato de cálcio (Ca(NO 3 ) 2 ) ou óleo mineral, têm efeito na indução da brotação da macieira, apresentando muitas vezes resultados similares aos do tratamento padrão de óleo mineral mais cianamida hidrogenada (PASA et al, 2018;FENILI et al, 2018;HAWERRO-TH et al, 2010).…”

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Aumento da brotação de gemas na macieira cv. Maxi gala com a aplicação sequencial de indutores de brotação

Petri

Sezerino

Fenili

2021

RAC

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O objetivo do trabalho foi verificar o efeito da reaplicação dos indutores de brotação na floração, brotação e produção da macieira ‘Maxi Gala’. O experimento foi desenvolvido em pomar experimental localizado no município de Caçador, durante os ciclos de 2016/2017 a 2019/2020. Os tratamentos foram aplicados no estádio B e C e, os com reaplicação, de 7 a 14 dias após a primeira aplicação. Foram realizadas a avaliação da fenologia, brotação de gemas axilares e terminais, frutificação efetiva, produção por planta e massa média dos frutos. Os tratamentos aplicados no estádio B propiciaram um maior adiantamento dos eventos fenológicos em relação às aplicações no estádio C. A brotação das gemas axilares e dos terminais foi maior em todos os tratamentos com indutores de brotação em relação ao tratamento testemunha. Em alguns ciclos, a aplicação sequencial de indutores de brotação aumentou a brotação de gemas axilares e terminais em relação ao tratamento de uma única aplicação. A frutificação efetiva dos tratamentos com aplicação sequencial de indutores de brotação não foi reduzida em relação ao tratamento com uma única aplicação. Alguns tratamentos com reaplicação melhoraram a produtividade das macieiras. Na média, a reaplicação de indutores de brotação aumentou a massa média dos frutos.

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Effects of alternatives to hydrogen cyanamide on commercial ‘Hayward’ kiwifruit production

Cited by 12 publications

References 16 publications

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

Aumento da brotação de gemas na macieira cv. Maxi gala com a aplicação sequencial de indutores de brotação

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