Effects of Planting Date, Cultivar and Vernalization Using Gibberellic Acid on the Severity of Root-Knot Nematode Damage to Globe Artichoke in Subtropical Sandy Soil
Author:
X. Bui Hung1, Agehara Shinsuke2, Wang Weining2, A. Desaeger Johan1
Affiliation:
1. Entomology and Nematology Department, University of Florida, Gulf Coast Research and Education Center , Wimauma , Florida United States 2. Horticulture Department, Gulf Coast Research and Education Center, University of Florida , Wimauma , Florida United States
Abstract
Abstract
Globe artichoke (Cynara cardunculus var. scolymus L.) is a new alternative crop in Florida. This long-season crop poses a very high risk of root-knot nematode (RKN) damage, the most important nematode problem in vegetable production in Florida. This study aimed to examine the impact of RKN damage on artichoke production in the subtropical climate of Florida. Treatments consisted of four cultivars (‘Green Globe Improved’, ‘Green Queen’, ‘Imperial Star’, and ‘Opal’) planted on three different dates (October 5, October 19, and November 2) in Experiment 1, and three cultivars (‘Green Globe Improved’, ‘Green Queen’, and ‘Imperial Star’) grown with or without vernalization using gibberellic acid (GA3) in Experiment 2. Both field experiments were conducted on sandy soil in west-central Florida during the 2020–2021 and 2021–2022 growing seasons. We collected RKN population density and gall index (GI) data to assess RKN damage. In Experiment 1, all tested cultivars showed moderate to high RKN infection in the 2021–2022 season, with 43% to 75% of roots galled. There was no effect of planting dates on RKN damage in the 2020–2021 season. However, delaying the planting date from October 5 to November 2 reduced the RKN damage while increasing the RKN population densities in the 2021–2022 season. In Experiment 2, all tested cultivars showed high RKN infestation, with more than 80% of roots galled. Vernalization by GA3 did not affect the severity of RKN damage. Our results suggest that all tested artichoke cultivars are highly susceptible to RKN in subtropical environments of Florida, raising an alarm on the risk of RKN damage to commercial artichoke production and increasing awareness about the need for RKN management.
Publisher
Walter de Gruyter GmbH
Reference23 articles.
1. Agehara, S. 2017. Production guidelines for globe artichoke in Florida. Institute of Food and Agricultural Sciences. HS1289, University of Florida, Gainesville, Florida. 2. Baidoo, R., Joseph, S., Mengistu, T. M., Brito, J. A., McSorley, R., Stamps, R. H., and Crow, W. T. 2016. Mitochondrial haplotype-based identification of root-knot nematodes Meloidogyne spp.) on cut foliage crops in Florida. Journal of Nematology 48:193-202. 3. Bridge, J., and Page, S. L. 1980. Estimation of root-knot nematode infestation levels on roots using a rating chart. International Journal Pest Management 26: 296-298. 4. Brito, J. A., Kaur, R., Cetintas, R., Stanley, J. D., Mendes, Power, T. O., and Dickson, D. W. 2010. Meloidogyne spp. infecting ornamental plants in Florida. Nematropica 40:87-103. 5. Brito, J. A., Stanley, J. D., Mendes, M. L., Cetintas, R., and Dickson, D. W. 2007. Host status of selected cultivated plants to Meloidogyne mayaguensis in Florida. Nematropica 37:65-72.
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