Feathering of ‘Doyenné du Comice’ pear in the nursery using repeat sprays of benzyladenine and gibberellins

Palmer, John W.; Seymour, S.; Diack, Robert

doi:10.1016/j.scienta.2011.06.023

Cited by 11 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TCSA = trunk cross sectional area; NS = nonsignifigant at P # 0.05. when using MaxCel Ò compared with Promalin Ò . Similar tree height decreases were reported by Palmer et al, (2011) when spraying the cytokinins, thidiazuron and benzyladenine, on pear trees. Similar to our results, Jacyna and Barnard (2008) observed greater leader growth on different apple hybrids when spraying Promalin Ò at 250-750 mg • L -1 .…”

Section: Discussionsupporting

confidence: 81%

Use of Plant Growth Regulators for Feathering and Flower Suppression of Apple Nursery Trees

Lordan

Robinson

Sazo

et al. 2017

horts

View full text Add to dashboard Cite

The use of highly feathered trees can make high-density apple plantings more profitable through enhanced precocity and increased early yield. Currently, nurseries are asked to provide highly feathered trees with wide branch crotch angles. The use of plant growth regulators (PGRs) can play a key role when it comes to branch induction; however, dose and timing both need to be tested to enhance branching without compromising other tree quality attributes. Over the last 4 years, we have conducted studies of the use of MaxCel® (6-benzyladenine) and Promalin® (a mixture of 1.8% 6-benzyladenine and 1.8% GA4+7) in comparison with Tiberon™ SC (cyclanilide) at several nurseries in NY, WA, DE, Ontario (Canada), and Chile. The best results were obtained with four applications of MaxCel® or Promalin® (400 mg·L−1) beginning when leader growth reached 70 cm above the soil line and reapplied at 10–14 days intervals. Promalin® was a slightly less effective branching agent than MaxCel®. On the other hand, Promalin® stimulated leader growth resulting in improved final tree height, whereas MaxCel® induced the widest branch angles. Overall, we observed good response and quality ratings with ‘Cameo’, ‘Cripps Pink’, ‘Enterprise’, ‘Fuji’, ‘Ambrosia’, ‘Crimson Crisp’, ‘Gingergold’, and ‘Granny Smith’, whereas less quality ratings were observed on ‘Ambrosia’, ‘Cortland’, ‘Goldrush’, ‘Honeycrisp’, and ‘Suncrisp’. Response with ‘Gala’ varied depending on the temperature range. Multiple sprays of Gibberellins (GA4+7, or GA3) at 250 mg·L−1 applied to nursery trees in the late summer inhibited flower bud development and flowering in the orchard the next year. This reduces the risk of fire blight infection in newly planted trees.

show abstract

Section: Discussionsupporting

confidence: 81%

Use of Plant Growth Regulators for Feathering and Flower Suppression of Apple Nursery Trees

Lordan

Robinson

Sazo

et al. 2017

horts

View full text Add to dashboard Cite

show abstract

“…These differences were driven, other than by the vegetative behaviour, the age of the rootstocks (2 and 3-year old for cherry and pome trees, respectively) or the grafting compatibility, more likely by the reiterate application of benzyladenine mixed with gibberellins (i.e. GA4 and GA7) that were applied only to pome fruit trees with the aim to promote lateral shoot formation, as usually reported for these species (Palmer et al, 2011). The interactions of such factors mirrored the biomass partitioning.…”

Section: Discussionmentioning

confidence: 96%

Nutrient removal by apple, pear and cherry nursery trees

et al. 2017

View full text Add to dashboard Cite

Given that nursery is a peculiar environment, the amount of nutrients removed by nursery trees represents a fundamental acquisition to optimize fertilization strategies, with economic and environmental implications. In this context, we determined nutrient removal by apple, pear and cherry nursery trees at the end of the nursery growing cycle. We randomly removed 5 leafless apple (Golden Delicious/EMLA M9; density of 30,000 trees ha-1), pear (Santa Maria/Adams; density of 30,000 trees ha-1) and cherry (AlexTM/Gisela®; density of 40,000 trees ha-1) trees from a commercial nursery. Trees were divided into roots (below the root collar), rootstock (aboveground between root collar and grafting point) and variety (1-year-old above the grafting point). For each organ we determined biomass, macro (N, P, K, Ca, Mg, S,) and micro (Fe, Mn, Zn, Cu, and B) nutrient concentration. Pear trees were the most developed (650 g tree-1, equal to 1.75 and 2.78 folds than apple and cherry trees, respectively) whereas, independently of the species, variety mostly contributed (>50%) to the total tree biomass, followed by roots and then aboveground rootstock. However, the dry biomass and nutrient amount measured in rootstocks (including roots) represent the cumulative amount of 2 and 3seasons, for Gisela® 6 (tissue culture) and pome fruit species (generated by mound layering), respectively. Macro and micronutrients were mostly concentrated in roots, followed by variety and rootstock, irrespective of the species. Independently of the tissue, macronutrients concentration hierarchy was N>Ca>K> P>Mg>S. Removed N by whole tree accounted for 6.58, 3.53 and 2.49 g tree-1 for pear, apple and cherry, respectively, correspondingto almost 200, 107 and 100 kg N ha-1, respectively. High amounts of K and Ca were used by pear (130-140 kg ha-1) and apple trees (~50 and 130 kg ha-1 of K and Ca, respectively), while ~25 kg K ha-1 and 55 kg Ca ha-1 were calculated for cherry nursery trees. Among micronutrients, Fe was the most required (~3 kg ha-1) independently of the species. B removal ranged between 1.2 and 2.4 kg ha-1 (80, 40 and 30 mg tree-1 for pear, apple and cherry, respectively) whereas Mn, Cu and Zn accounted for few hundred g ha-1, irrespective of the species. Given that nutrient concentration among tissues resulted within the same order of magnitude, irrespective of the species, differences in removal were mainly driven by the tree biomass as proved by the significant correlations between plant dry biomass with most of the nutrients we observed.

show abstract

“…The source of cytokinins plays an important role in inducing branches and also the length, as in European pears, BA + GA 4+7 was more effective than TDZ + GA 4+7 in inducing sylleptic shoots, and it was expected that cytokinins alone play more important role in inducing thorns and spines, but both TDZ and BA did no differ from the untreated control, while GA 4+7 without the presence of any cytokinin greatly induced the emission of thorns (Palmer et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…These PGRs and also cyclanilide promote lateral branching when sprayed multiple times throughout the season, as they promote a shortterm leader growth shortage, thus allowing the lateral buds to break and forming branches; in many reports found on the literature, the use of such PGRs promote a linear tree height decrease inversely proportional to the dose applied, although this response may be different according to the cultivar and weather conditions (Sazo & Robinson, 2011;Robinson & Sazo, 2014). Palmer et al (2011) reported that cytokinins sprayed alone has a stronger effect on reducing pear tree height, although GA 4+7 increases tree height. This could be observed in the current experiment in the rootstocks G.213 and M.9 in the first year and Mar./M.9 in both years, where there was a linear tree height reduction promoted by BA alone proportionally to the rate.…”

Section: Discussionmentioning

confidence: 99%

Lateral Branch Induction at Nursery With Growth Regulators in ‘Maxi Gala’ Apple Trees Grafted on Four Rootstocks

Rufato

Marchioretto

Orlandi

et al. 2019

Scientia Horticulturae

View full text Add to dashboard Cite

Feathering of ‘Doyenné du Comice’ pear in the nursery using repeat sprays of benzyladenine and gibberellins

Cited by 11 publications

References 12 publications

Use of Plant Growth Regulators for Feathering and Flower Suppression of Apple Nursery Trees

Use of Plant Growth Regulators for Feathering and Flower Suppression of Apple Nursery Trees

Nutrient removal by apple, pear and cherry nursery trees

Lateral Branch Induction at Nursery With Growth Regulators in ‘Maxi Gala’ Apple Trees Grafted on Four Rootstocks

Contact Info

Product

Resources

About