Effects of Temperature on Ethylene Evolution From Ethephon

Lougheed, E. C.; Franklin, E. W.

doi:10.4141/cjps72-125

Cited by 19 publications

(18 citation statements)

References 7 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 and 4). Previous studies have also described the marked effect of temperature on ethylene evolution from ethephon applied to tomato fruit and sour cherry leaves (Flore and Bukovac, 1982;Lougheed and Franklin, 1972;Olien and Bukovac, 1978) and from pure ethephon solutions buffered to pH 6.0 (Olien and Bukovac, 1978). Warmer temperatures tended to cause taller plants and as growth temperatures increased, the effect of substrate-applied ethephon also tended to increase.…”

Section: Discussionmentioning

confidence: 93%

Novel Ethephon Application Methods for Narcissus

Miller¹,

Olberg²

2016

horts

View full text Add to dashboard Cite

Ethephon [(2-chloroethyl) phosphonic acid] is a plant growth regulator (PGR) that releases ethylene following application. Although ethephon is commonly used as a foliar spray during the commercial production of ornamental crops, including spring bulb crops such as daffodil (Narcissus pseudonarcissus L.), there has been increased interest in using ethephon as a root-zone-applied PGR. In this work, we evaluated a number of factors important for the development of ethephon as a soil drench for daffodil. Results indicate that a given dose (milligrams ethephon per pot) could be applied in volumes ranging from 15 to 120 mL (per 15-cm pot) with equal efficacy. Similarly, the same dose of ethephon could be applied as a foliar/substrate surface spray with volume of 105 to 525 mL·m−2 with equal efficacy. Although the efficacy of ethephon drenches interacted with forcing temperature, drenches were nonetheless effective across the range of temperatures commonly used for daffodil production. Plant size at the time of ethephon application had no effect on final plant size (at flower senescence). The rate of ethylene release from a peat-based substrate was highly temperature dependent, and ethephon was readily leached from this same substrate.

show abstract

Section: Discussionmentioning

confidence: 93%

Novel Ethephon Application Methods for Narcissus

Miller¹,

Olberg²

2016

horts

View full text Add to dashboard Cite

show abstract

“…Each bar represents a mean of six plants, and error bars represent SE. (Biddle et al, 1976;Klein et al, 1979;Lougheed and Franklin, 1972). Klein et al (1979) demonstrated that the half-life of ethephon decomposition decreases dramatically regardless of pH or vapor pressure as temperature increases from 20 to 30°C.…”

Section: Discussionmentioning

confidence: 99%

“…Glyphosate efficacy is greater when applied at 35°C compared with applications at 24°C (McWhorter et al, 1980), whereas more slowly metabolized herbicides, such as mesotrione, have a greater efficacy when applied at lower temperatures (e.g., 25/15°C compared with 40/30°C day/night) (Godar et al, 2015). At high temperatures, the half-life of ethephon is less due to the rapid evolution from ethephon to ethylene (Biddle et al, 1976;Klein et al, 1979;Lougheed and Franklin, 1972). However, we have found no research conducted in a greenhouse environment to determine how average daily air temperature (ADT) during and following application (TEMP) affects the efficacy of ethephon on bedding plants.…”

mentioning

confidence: 99%

Ethephon Foliar Sprays Are Influenced by Carrier Water Alkalinity and Ambient Air Temperature at Application

Walters

López

2018

horts

View full text Add to dashboard Cite

Additional index words. bedding plants, calcium carbonate, ethylene, PGR, water quality Abstract. The plant growth regulator (PGR) ethephon [(2-chloroethyl) phosphonic acid; ETH] can be sprayed on floriculture crops to inhibit internode elongation, hinder apical dominance, increase lateral branching, and abort flower buds and flowers. However, the efficacy of ETH can be reduced as the pH of the carrier water used to mix the spray solution or temperature increase. Therefore, our objective was to quantify how the efficacy of ethephon sprays is influenced by carrier water alkalinity (CaCO 3 ; ALK) and the air temperature at application (TEMP). Young plants of verbena (Verbena peruviana) 'Aztec Blue Velvet', ivy geranium (Pelargonium 3peltatum) 'Precision Pink', and petunia (Petunia 3hybrida) 'Easy Wave Neon Rose' were transplanted into 11-cmdiameter containers and grown in a greenhouse with an average daily air temperature (ADT) set point of 21 8C. Before the ETH spray application(s), the ADT in each greenhouse compartment was changed from a set point of 21 8C to 14, 17, 20, 23, or 26 8C for ' '24 hours. Plants were sprayed with 0, 250, 500, or 750 mg · L L1 ETH mixed with carrier water containing ' '50, 150, or 300 mg · L L1 CaCO 3 2 and 3 weeks (Expt. 1) or 1 or 2 weeks (Expt. 2) after transplant. Generally, high ALK had a negative effect on spray

show abstract

“…1912) and curing time is reduced (Chakroborty et al 1979;Domir and Foy 1976; Kwaih et al 1972;Hsieh et al 1912). Response varies considerably with degree of leaf ripeness (Domir and Foy 1976;Long et al 1974;Walker 1911), temperature at time of spray application (Lougheed and Franklin 1972) (Long et al 1974) or parts of leaves (Moon and Sin 1972) contacted by spray. The practical utility of ethephon would appear to be enhanced by using 100 mg per plant or less (Chakroborty etal.1979;Long et al1974;Weybrew et al 1973), by harvesting as soon as a color change becomes evident (Miles et al 1972), by curing with systems of good drying capacity (Weybrew et al 1913), and by treatment only of leaves at upper stalk positions (Walker 1977).…”

mentioning

confidence: 99%