Cultivar, fertilizer, and irrigation affect vegetative growth and susceptibility of chrysanthemum to western flower thrips

Ursula K Schuch, Richard A. Redak, James A. Bethke

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

'Fontana', 'Iridon', 'Pink Lady', 'Splendor', 'White Diamond', and 'White View Time' chrysanthemum (Dendranthema xgrandiflorum Ramat.) were grown for 10 weeks with N rates of 80, 160, or 240 mg · L-1 constant liquid fertilization and irrigated at sufficient (high) or deficient (low) amount. Cultivars differed in growth habit, and treatments significantly affected all variables measured. Plants fertilized with 80 mg · L-1 had lower leaf and stem dry mass, less leaf area, and were deficient in leaf N compared with plants fertilized with twice the amount of N. The highest stem dry mass was produced with 160 mg · L-1. Leaf and stem dry mass were reduced 25% for plants receiving low irrigation compared to those receiving high irrigation. In general, leaf area increased when fertilizer was raised from 80 to 160 mg · L-1 but differed by cultivar and irrigation regime when fertilizer was increased to 240 mg · L-1. Three weeks after the experiment started, electrical conductivity (EC) of runoff collected weekly from 'White Diamond' plants fertilized with 240 mg · L-1 exceeded the average EC of the irrigation solution. The 240 mg · L-1 treatment also resulted in excessive EC in the growing substrate at the end of the experiment and reduced stem dry mass by 11% compared with the 160 mg · L-1 fertilizer regime. Substrate EC differed between cultivars in response to fertilizer and irrigation. Significantly more adult western flower thrips [Frankliniella occidentalis (Pergrande)], 55% and 52%, were found on the foliage of 'Pink Lady' and 'Fontana', respectively, than on 'Iridon'. 'Pink Lady' and 'Fontana' had more immature thrips at the end of the experiment than 'Iridon' and 'White View Time'. Fewer adults and iramatures were found on plants fertilized with 80 mg · L-1 than 240 mg · L-1. Fewer adults were detected in plants under high versus low irrigation, while irrigation had no effect on the number of immatures. The simultaneous use of plant varietal resistance and plant cultural growing techniques has the potential to lower thrips populations on chrysanthemum.

Original languageEnglish (US)
Pages (from-to)727-733
Number of pages7
JournalJournal of the American Society for Horticultural Science
Volume123
Issue number4
StatePublished - 1998
Externally publishedYes

Fingerprint

Thysanoptera
Chrysanthemum
Frankliniella occidentalis
Fertilizers
vegetative growth
fertilizers
irrigation
Electric Conductivity
cultivars
Growth
electrical conductivity
Diamond
stems
leaves
leaf area
immatures
varietal resistance
growth habit
Fertilization
irrigation management

Keywords

  • Chlorophyll content
  • Frankliniella occidentalis
  • SPAD
  • Water stress

ASJC Scopus subject areas

  • Horticulture
  • Plant Science

Cite this

Cultivar, fertilizer, and irrigation affect vegetative growth and susceptibility of chrysanthemum to western flower thrips. / Schuch, Ursula K; Redak, Richard A.; Bethke, James A.

In: Journal of the American Society for Horticultural Science, Vol. 123, No. 4, 1998, p. 727-733.

Research output: Contribution to journalArticle

@article{6086d56b2dd641e69e2831f7bc238111,
title = "Cultivar, fertilizer, and irrigation affect vegetative growth and susceptibility of chrysanthemum to western flower thrips",
abstract = "'Fontana', 'Iridon', 'Pink Lady', 'Splendor', 'White Diamond', and 'White View Time' chrysanthemum (Dendranthema xgrandiflorum Ramat.) were grown for 10 weeks with N rates of 80, 160, or 240 mg · L-1 constant liquid fertilization and irrigated at sufficient (high) or deficient (low) amount. Cultivars differed in growth habit, and treatments significantly affected all variables measured. Plants fertilized with 80 mg · L-1 had lower leaf and stem dry mass, less leaf area, and were deficient in leaf N compared with plants fertilized with twice the amount of N. The highest stem dry mass was produced with 160 mg · L-1. Leaf and stem dry mass were reduced 25{\%} for plants receiving low irrigation compared to those receiving high irrigation. In general, leaf area increased when fertilizer was raised from 80 to 160 mg · L-1 but differed by cultivar and irrigation regime when fertilizer was increased to 240 mg · L-1. Three weeks after the experiment started, electrical conductivity (EC) of runoff collected weekly from 'White Diamond' plants fertilized with 240 mg · L-1 exceeded the average EC of the irrigation solution. The 240 mg · L-1 treatment also resulted in excessive EC in the growing substrate at the end of the experiment and reduced stem dry mass by 11{\%} compared with the 160 mg · L-1 fertilizer regime. Substrate EC differed between cultivars in response to fertilizer and irrigation. Significantly more adult western flower thrips [Frankliniella occidentalis (Pergrande)], 55{\%} and 52{\%}, were found on the foliage of 'Pink Lady' and 'Fontana', respectively, than on 'Iridon'. 'Pink Lady' and 'Fontana' had more immature thrips at the end of the experiment than 'Iridon' and 'White View Time'. Fewer adults and iramatures were found on plants fertilized with 80 mg · L-1 than 240 mg · L-1. Fewer adults were detected in plants under high versus low irrigation, while irrigation had no effect on the number of immatures. The simultaneous use of plant varietal resistance and plant cultural growing techniques has the potential to lower thrips populations on chrysanthemum.",
keywords = "Chlorophyll content, Frankliniella occidentalis, SPAD, Water stress",
author = "Schuch, {Ursula K} and Redak, {Richard A.} and Bethke, {James A.}",
year = "1998",
language = "English (US)",
volume = "123",
pages = "727--733",
journal = "Journal of the American Society for Horticultural Science",
issn = "0003-1062",
publisher = "American Society for Horticultural Science",
number = "4",

}

TY - JOUR

T1 - Cultivar, fertilizer, and irrigation affect vegetative growth and susceptibility of chrysanthemum to western flower thrips

AU - Schuch, Ursula K

AU - Redak, Richard A.

AU - Bethke, James A.

PY - 1998

Y1 - 1998

N2 - 'Fontana', 'Iridon', 'Pink Lady', 'Splendor', 'White Diamond', and 'White View Time' chrysanthemum (Dendranthema xgrandiflorum Ramat.) were grown for 10 weeks with N rates of 80, 160, or 240 mg · L-1 constant liquid fertilization and irrigated at sufficient (high) or deficient (low) amount. Cultivars differed in growth habit, and treatments significantly affected all variables measured. Plants fertilized with 80 mg · L-1 had lower leaf and stem dry mass, less leaf area, and were deficient in leaf N compared with plants fertilized with twice the amount of N. The highest stem dry mass was produced with 160 mg · L-1. Leaf and stem dry mass were reduced 25% for plants receiving low irrigation compared to those receiving high irrigation. In general, leaf area increased when fertilizer was raised from 80 to 160 mg · L-1 but differed by cultivar and irrigation regime when fertilizer was increased to 240 mg · L-1. Three weeks after the experiment started, electrical conductivity (EC) of runoff collected weekly from 'White Diamond' plants fertilized with 240 mg · L-1 exceeded the average EC of the irrigation solution. The 240 mg · L-1 treatment also resulted in excessive EC in the growing substrate at the end of the experiment and reduced stem dry mass by 11% compared with the 160 mg · L-1 fertilizer regime. Substrate EC differed between cultivars in response to fertilizer and irrigation. Significantly more adult western flower thrips [Frankliniella occidentalis (Pergrande)], 55% and 52%, were found on the foliage of 'Pink Lady' and 'Fontana', respectively, than on 'Iridon'. 'Pink Lady' and 'Fontana' had more immature thrips at the end of the experiment than 'Iridon' and 'White View Time'. Fewer adults and iramatures were found on plants fertilized with 80 mg · L-1 than 240 mg · L-1. Fewer adults were detected in plants under high versus low irrigation, while irrigation had no effect on the number of immatures. The simultaneous use of plant varietal resistance and plant cultural growing techniques has the potential to lower thrips populations on chrysanthemum.

AB - 'Fontana', 'Iridon', 'Pink Lady', 'Splendor', 'White Diamond', and 'White View Time' chrysanthemum (Dendranthema xgrandiflorum Ramat.) were grown for 10 weeks with N rates of 80, 160, or 240 mg · L-1 constant liquid fertilization and irrigated at sufficient (high) or deficient (low) amount. Cultivars differed in growth habit, and treatments significantly affected all variables measured. Plants fertilized with 80 mg · L-1 had lower leaf and stem dry mass, less leaf area, and were deficient in leaf N compared with plants fertilized with twice the amount of N. The highest stem dry mass was produced with 160 mg · L-1. Leaf and stem dry mass were reduced 25% for plants receiving low irrigation compared to those receiving high irrigation. In general, leaf area increased when fertilizer was raised from 80 to 160 mg · L-1 but differed by cultivar and irrigation regime when fertilizer was increased to 240 mg · L-1. Three weeks after the experiment started, electrical conductivity (EC) of runoff collected weekly from 'White Diamond' plants fertilized with 240 mg · L-1 exceeded the average EC of the irrigation solution. The 240 mg · L-1 treatment also resulted in excessive EC in the growing substrate at the end of the experiment and reduced stem dry mass by 11% compared with the 160 mg · L-1 fertilizer regime. Substrate EC differed between cultivars in response to fertilizer and irrigation. Significantly more adult western flower thrips [Frankliniella occidentalis (Pergrande)], 55% and 52%, were found on the foliage of 'Pink Lady' and 'Fontana', respectively, than on 'Iridon'. 'Pink Lady' and 'Fontana' had more immature thrips at the end of the experiment than 'Iridon' and 'White View Time'. Fewer adults and iramatures were found on plants fertilized with 80 mg · L-1 than 240 mg · L-1. Fewer adults were detected in plants under high versus low irrigation, while irrigation had no effect on the number of immatures. The simultaneous use of plant varietal resistance and plant cultural growing techniques has the potential to lower thrips populations on chrysanthemum.

KW - Chlorophyll content

KW - Frankliniella occidentalis

KW - SPAD

KW - Water stress

UR - http://www.scopus.com/inward/record.url?scp=0031840861&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031840861&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031840861

VL - 123

SP - 727

EP - 733

JO - Journal of the American Society for Horticultural Science

JF - Journal of the American Society for Horticultural Science

SN - 0003-1062

IS - 4

ER -