Removal of paclobutrazol from irrigation water using granular-activated carbon

Grant, George; Fisher, Paul R.; Barrett, James E.

doi:10.1007/s00271-018-0572-1

Cited by 12 publications

(14 citation statements)

References 24 publications

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“…PBZ residues in the soil also inhibited growth and development in potatoes and taro (Jiang et al, 2019) and reduced seed germination and plant growth in cucumber and tomato (Magnitskiy et al, 2006;Still and Pill, 2003). When used in closed capture irrigation systems, PBZ residues can accumulate and reduce growth of subsequent crops, which necessitates remediation (Grant et al, 2018). Therefore, routine use of PBZ may not be an option for growers cultivating in-field sown crops or rotating PBZ-sensitive crops.…”

Section: Discussionmentioning

confidence: 99%

Reducing Preharvest Bolting in Open-field-grown Cilantro (Coriandrum sativum L. cv. Santo) through Use of Growth Regulators

Meyering¹,

Hoeffner²,

Albrecht³

2020

horts

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Cilantro (Coriandrum sativum L.), also called coriander, is an herbaceous, annual plant that is cultivated worldwide for its leaves and seeds. Cilantro has a strong propensity to bolt quickly in hot weather and under long-day (LD) conditions, which affects the flavor and renders the crop unmarketable. High incidence of preharvest bolting in open-field production can cause significant economic loss. The phytohormone gibberellic acid (GA) regulates stem elongation and floral initiation in many LD rosette plants. In pilot experiments, we found that GA induced bolting in greenhouse-grown cilantro and that plant growth regulators (PGRs) with anti-GA activity can delay this process. We then explored the effects of different GA inhibitors on reducing the incidence of bolting in cilantro grown in a commercial open-field environment. Four field trials were conducted on a commercial farm near Clewiston in Florida between Fall 2016 and Spring 2018. Different growth regulators were applied at different times, ranging from 5 to 8 weeks after seeding (WAS), and plants were harvested 2 to 3 weeks thereafter. Applications of GA inhibitors significantly reduced the incidence of bolting in three of the four trials, but the extent depended on the type of inhibitor used. The results from one trial were inconclusive due to changes in weather that prevented bolting in the entire field. Overall, plots treated with prohexadione calcium and paclobutrazol were most effective and reduced bolting by up to 78%. Applying the PGRs at 5 and 6 WAS was more effective than at 7 or 8 WAS.

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Section: Discussionmentioning

confidence: 99%

Reducing Preharvest Bolting in Open-field-grown Cilantro (Coriandrum sativum L. cv. Santo) through Use of Growth Regulators

Meyering¹,

Hoeffner²,

Albrecht³

2020

horts

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“…This favours the activation of the enzymes geranylgeranyl reductase and phytoene synthase for chlorophyll and abscisic acid biosynthesis, respectively (Fig. 1) [23,38,39]. As a result, it decreases vigour and promotes floral induction and development [9,10,15].…”

Section: Strigol Strigyl Acetate and Sorgolactonementioning

confidence: 99%

“…Among the main effects and physiological processes affected that have been reported with the application of PBZ are the synthesis of gibberellins, floral induction, photosynthetic activity by promoting a higher concentration of chlorophyll, reduction of the transpiration rate (closure of stomata) and activation of antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase and peroxidase) related to the mitigation of oxidative stress [23,37]. It is applied via foliar and soil at concentrations ranging from 1-200 mg L -1 and 0.1-8.0 mg L -1 , respectively [39].…”

Section: Use Of Pbz In Fruit Treesmentioning

confidence: 99%

Paclobutrazol and Its Use in Fruit Production: A Review

Orozco-Mel閚dez¹,

Hern醤dez-Rodr韌uez²,

Cruz-羖varez³

et al. 2022

Phyton

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There are documentary records referring to paclobutrazol (PBZ) as a growth bioregulator that inhibits the gibberellin synthesis and its application increases yields in fruit and vegetable crop productions. Its agronomic management includes it as an emerging technology to reduce vigour, promote flower induction and flower development in fruit trees with increased economic returns. Its use is banned in some countries because of concerns about residues that can cause harmful effects on the environment. Therefore, the aim of this article was to collect, analyse and summarise relevant information on the use of PBZ in fruit tree production and its possible risks to the environment. The results obtained indicated that the application of PBZ can be effective in solving some problems related to flowering if it is applied in the right amount and at the right time. However, it is necessary to elucidate the physiological processes with which it is associated and its response to be taken into account to increase yield. PBZ is currently used in fruit trees such as mango, lime, apple and guava, increasing their productivity. However, some studies have shown its residual effect on the environment. Therefore, PBZ is a viable strategy, because it presents a series of advantages in the production of fruit trees. However, it is vital to generate protocols that seek its regulation with a rational and sustainable approach.

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“…Well water alkalinity is about 125 mg L −1 , with a pH of 7.3 and EC of 0.4 dS cm −1 . There are no other specific water quality concerns, except for paclobutrazol, a water-soluble plant growth regulator in the return pond water (discussed below), which has a half-life of over 6 months in water [42]. Now that the operation uses recycled reservoir water filtered by the SSF, the intention is to use this as the primary water source, supplemented during the summer months with well water.…”

Section: Case Study Amentioning

confidence: 99%

A Comparison of Irrigation-Water Containment Methods and Management Strategies Between Two Ornamental Production Systems to Minimize Water Security Threats

Ristvey

Belayneh

Lea‐Cox

2019

Water

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Water security in ornamental plant production systems is vital for maintaining profitability. Expensive, complicated, or potentially dangerous treatment systems, together with skilled labor, is often necessary to ensure water quality and plant health. Two contrasting commercial ornamental crop production systems in a mesic region are compared, providing insight into the various strategies employed using irrigation-water containment and treatment systems. The first is a greenhouse/outdoor container operation which grows annual ornamental plants throughout the year using irrigation booms, drip emitters, and/or ebb and flow systems depending on the crop, container size, and/or stage of growth. The operation contains and recycles 50–75% of applied water through a system of underground cisterns, using a recycling reservoir and a newly constructed 0.25 ha slow-sand filtration (SSF) unit. Groundwater provides additional water when needed. Water quantity is not a problem in this operation, but disease and water quality issues, including agrochemicals, are of potential concern. The second is a perennial-plant nursery which propagates cuttings and produces field-grown trees and containerized plants. It has a series of containment/recycling reservoirs that capture rainwater and irrigation return water, together with wells of limited output. Water quantity is a more important issue for this nursery, but poor water quality has had some negative economic effects. Irrigation return water is filtered and sanitized with chlorine gas before being applied to plants via overhead and micro-irrigation systems. The agrochemical paclobutrazol was monitored for one year in the first operation and plant pathogens were qualified and quantified over two seasons for both production systems. The two operations employ very different water treatment systems based on their access to water, growing methods, land topography, and capital investment. Each operation has experienced different water quantity and quality vulnerabilities, and has addressed these threats using a variety of technologies and management techniques to reduce their impacts.

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Removal of paclobutrazol from irrigation water using granular-activated carbon

Cited by 12 publications

References 24 publications

Reducing Preharvest Bolting in Open-field-grown Cilantro (Coriandrum sativum L. cv. Santo) through Use of Growth Regulators

Reducing Preharvest Bolting in Open-field-grown Cilantro (Coriandrum sativum L. cv. Santo) through Use of Growth Regulators

Paclobutrazol and Its Use in Fruit Production: A Review

A Comparison of Irrigation-Water Containment Methods and Management Strategies Between Two Ornamental Production Systems to Minimize Water Security Threats

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