Flowering of the cover crop sunn hemp, Crotalaria juncea L.

Robert L. Meagher, Rodney N. Nagoshi, James T. Brown, Shelby Jay Fleischer, John K. Westbrook, Carlene A. Chase

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Sunn hemp, Crotalaria juncea L., is a warm-season legume that is planted before or after a vegetable cash crop to add nutrients and organic matter to the soil, for weedgrowth prevention, and to suppress nematode populations. Sunn hemp flowers may also provide nectar and pollen for pollinators and enhance biological control by furnishing habitat for natural enemies. Despite these benefits, adoption in the United States has been limited because of restricted availability of seeds, particularly in temperate climates. Experiments were conducted in north-central Florida to compare flowering and seed production of domestic and foreign sunn hemp lines across different seeding rates and planting dates. Our objectives were to test whether a low seeding rate would result in the production of higher numbers of flowers and to test whether planting earlier in the season would also result in higher numbers of flowers. Our results over a 2 year period showed that the domestic cultivar AU Golden is capable of substantial flowering and seed production in the test region, confirming the compatibility of local environmental conditions. Seed costs suggest that ‘AU Golden’ is comparable with sunn hemp lines grown in foreign countries and is much less expensive than the standard cultivar Tropic Sun from Hawaii. The results demonstrate the potential economic viability of early flowering cultivars of sunn hemp as a cover crop alternative in Florida to improve soils in agricultural landscapes.

Original languageEnglish (US)
Pages (from-to)986-990
Number of pages5
JournalHortScience
Volume52
Issue number7
DOIs
StatePublished - Jan 1 2017

Fingerprint

Crotalaria juncea
cover crops
flowering
seed crop production
flowers
cultivars
sowing
economic sustainability
cash crops
testing
planting date
warm season
vegetable crops
seeds
temperate zones
agricultural soils
Hawaii
nectar
pollinators
natural enemies

All Science Journal Classification (ASJC) codes

  • Horticulture

Cite this

Meagher, R. L., Nagoshi, R. N., Brown, J. T., Fleischer, S. J., Westbrook, J. K., & Chase, C. A. (2017). Flowering of the cover crop sunn hemp, Crotalaria juncea L. HortScience, 52(7), 986-990. https://doi.org/10.21273/HORTSCI11981-17
Meagher, Robert L. ; Nagoshi, Rodney N. ; Brown, James T. ; Fleischer, Shelby Jay ; Westbrook, John K. ; Chase, Carlene A. / Flowering of the cover crop sunn hemp, Crotalaria juncea L. In: HortScience. 2017 ; Vol. 52, No. 7. pp. 986-990.
@article{497a5f7e3db24832b80010f4003ddfa0,
title = "Flowering of the cover crop sunn hemp, Crotalaria juncea L.",
abstract = "Sunn hemp, Crotalaria juncea L., is a warm-season legume that is planted before or after a vegetable cash crop to add nutrients and organic matter to the soil, for weedgrowth prevention, and to suppress nematode populations. Sunn hemp flowers may also provide nectar and pollen for pollinators and enhance biological control by furnishing habitat for natural enemies. Despite these benefits, adoption in the United States has been limited because of restricted availability of seeds, particularly in temperate climates. Experiments were conducted in north-central Florida to compare flowering and seed production of domestic and foreign sunn hemp lines across different seeding rates and planting dates. Our objectives were to test whether a low seeding rate would result in the production of higher numbers of flowers and to test whether planting earlier in the season would also result in higher numbers of flowers. Our results over a 2 year period showed that the domestic cultivar AU Golden is capable of substantial flowering and seed production in the test region, confirming the compatibility of local environmental conditions. Seed costs suggest that ‘AU Golden’ is comparable with sunn hemp lines grown in foreign countries and is much less expensive than the standard cultivar Tropic Sun from Hawaii. The results demonstrate the potential economic viability of early flowering cultivars of sunn hemp as a cover crop alternative in Florida to improve soils in agricultural landscapes.",
author = "Meagher, {Robert L.} and Nagoshi, {Rodney N.} and Brown, {James T.} and Fleischer, {Shelby Jay} and Westbrook, {John K.} and Chase, {Carlene A.}",
year = "2017",
month = "1",
day = "1",
doi = "10.21273/HORTSCI11981-17",
language = "English (US)",
volume = "52",
pages = "986--990",
journal = "Hortscience: A Publication of the American Society for Hortcultural Science",
issn = "0018-5345",
publisher = "American Society for Horticultural Science",
number = "7",

}

Meagher, RL, Nagoshi, RN, Brown, JT, Fleischer, SJ, Westbrook, JK & Chase, CA 2017, 'Flowering of the cover crop sunn hemp, Crotalaria juncea L.', HortScience, vol. 52, no. 7, pp. 986-990. https://doi.org/10.21273/HORTSCI11981-17

Flowering of the cover crop sunn hemp, Crotalaria juncea L. / Meagher, Robert L.; Nagoshi, Rodney N.; Brown, James T.; Fleischer, Shelby Jay; Westbrook, John K.; Chase, Carlene A.

In: HortScience, Vol. 52, No. 7, 01.01.2017, p. 986-990.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Flowering of the cover crop sunn hemp, Crotalaria juncea L.

AU - Meagher, Robert L.

AU - Nagoshi, Rodney N.

AU - Brown, James T.

AU - Fleischer, Shelby Jay

AU - Westbrook, John K.

AU - Chase, Carlene A.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Sunn hemp, Crotalaria juncea L., is a warm-season legume that is planted before or after a vegetable cash crop to add nutrients and organic matter to the soil, for weedgrowth prevention, and to suppress nematode populations. Sunn hemp flowers may also provide nectar and pollen for pollinators and enhance biological control by furnishing habitat for natural enemies. Despite these benefits, adoption in the United States has been limited because of restricted availability of seeds, particularly in temperate climates. Experiments were conducted in north-central Florida to compare flowering and seed production of domestic and foreign sunn hemp lines across different seeding rates and planting dates. Our objectives were to test whether a low seeding rate would result in the production of higher numbers of flowers and to test whether planting earlier in the season would also result in higher numbers of flowers. Our results over a 2 year period showed that the domestic cultivar AU Golden is capable of substantial flowering and seed production in the test region, confirming the compatibility of local environmental conditions. Seed costs suggest that ‘AU Golden’ is comparable with sunn hemp lines grown in foreign countries and is much less expensive than the standard cultivar Tropic Sun from Hawaii. The results demonstrate the potential economic viability of early flowering cultivars of sunn hemp as a cover crop alternative in Florida to improve soils in agricultural landscapes.

AB - Sunn hemp, Crotalaria juncea L., is a warm-season legume that is planted before or after a vegetable cash crop to add nutrients and organic matter to the soil, for weedgrowth prevention, and to suppress nematode populations. Sunn hemp flowers may also provide nectar and pollen for pollinators and enhance biological control by furnishing habitat for natural enemies. Despite these benefits, adoption in the United States has been limited because of restricted availability of seeds, particularly in temperate climates. Experiments were conducted in north-central Florida to compare flowering and seed production of domestic and foreign sunn hemp lines across different seeding rates and planting dates. Our objectives were to test whether a low seeding rate would result in the production of higher numbers of flowers and to test whether planting earlier in the season would also result in higher numbers of flowers. Our results over a 2 year period showed that the domestic cultivar AU Golden is capable of substantial flowering and seed production in the test region, confirming the compatibility of local environmental conditions. Seed costs suggest that ‘AU Golden’ is comparable with sunn hemp lines grown in foreign countries and is much less expensive than the standard cultivar Tropic Sun from Hawaii. The results demonstrate the potential economic viability of early flowering cultivars of sunn hemp as a cover crop alternative in Florida to improve soils in agricultural landscapes.

UR - http://www.scopus.com/inward/record.url?scp=85027373524&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85027373524&partnerID=8YFLogxK

U2 - 10.21273/HORTSCI11981-17

DO - 10.21273/HORTSCI11981-17

M3 - Article

AN - SCOPUS:85027373524

VL - 52

SP - 986

EP - 990

JO - Hortscience: A Publication of the American Society for Hortcultural Science

JF - Hortscience: A Publication of the American Society for Hortcultural Science

SN - 0018-5345

IS - 7

ER -

Meagher RL, Nagoshi RN, Brown JT, Fleischer SJ, Westbrook JK, Chase CA. Flowering of the cover crop sunn hemp, Crotalaria juncea L. HortScience. 2017 Jan 1;52(7):986-990. https://doi.org/10.21273/HORTSCI11981-17