Vector control and foliar nutrition to maintain economic sustainability of bearing citrus in Florida groves affected by huanglongbing

Stansly, Philip A.; Arévalo, H. Alejandro; Qureshi, Jawwad A.; Jones, Matt; Hendricks, Katherine; Roberts, Pamela D.; Roka, Fritz

doi:10.1002/ps.3577

Cited by 131 publications

(151 citation statements)

References 17 publications

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“…For each of the treatments, the Ct values of Las varied over time but generally decreased from November 2008 to October 2011 ( Fig. 3; Stansly et al 2013). The Ct values of Las decreased in trees receiving nutrients compared to trees not receiving nutrients in the first 2 years.…”

Section: Discussionmentioning

confidence: 87%

“…These results suggest that insecticide and nutrient applications could not slow the spread of HLB once the trees were infected by Las (Chiyaka et al 2012). The Ct values of Las were significantly increased by insecticides in January 2010 but not significantly thereafter (Stansly et al 2013), suggesting that the effects of insecticides on Las titres were significant only in the initial phase of epidemic development. Overall, the insecticide treatments did not reduce HLB spread compared to the untreated controls.…”

Section: Discussionmentioning

confidence: 92%

“…Huanglongbing (Stansly et al 2013). In May 2012, 100 % of the trees tested in this study were HLB positive, despite the fact that the Asian citrus psyllid populations were consistently lower on insecticide-treated trees than on trees not treated with insecticide over the entire 4-year period.…”

Section: Discussionmentioning

confidence: 98%

“…HLB had just been detected in some trees in the experimental grove at that time. In the first few years (2008)(2009)(2010), effects of insecticide treatments on HLB development and yield were significant, but there were no effects of the nutrient treatment (Stansly et al 2013). The current study was carried out with the goal to investigate if prolonged treatment with nutrients (including ISR and SAR inducing agents) would have an effect on endophytic bacterial communities, Las titres, plant hormone concentrations and leaf sizes.…”

Section: Introductionmentioning

confidence: 94%

“…To test these hypotheses, soil and leaf samples were collected from the experimental grove mentioned above (Stansly et al 2013), and were analyzed for nutrients, endophytic microbial communities, Las titers, plant hormones and leaf sizes.…”

Section: Introductionmentioning

confidence: 99%

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Relation between plant nutrition, hormones, insecticide applications, bacterial endophytes, and Candidatus Liberibacter Ct values in citrus trees infected with Huanglongbing

et al. 2013

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Intensive insecticide and nutrient management have been attempted worldwide to reduce citrus huanglongbing (HLB) symptom development and yield loss. However, effects of insecticide and nutrient applications on HLB have been poorly understood. Leaf nutrients, jasmonic and salicylic acid contents, cycle threshold (Ct) values of Ca. Liberibacter asiaticus (Las), and community structure of endophytic α-proteobacteria were evaluated after insecticide treatment, 'nutrition' treatment (including systemic resistance inducing agents), or both in comparison with a control in a two-factor field experiment in 2008-2012. Leaf N, Mn, Zn and B significantly increased whilst Cu decreased after nutrient applications. Salicylic acid significantly increased in old leaves treated with insecticides, nutrients or both, and in young leaves treated with nutrients only. The jasmonic acid concentration was highest after the nutrition treatment in both old and young leaves. Ct values of Las and leaf area and weight significantly increased after long-term nutrient applications in 2011 and/or 2012. Redundancy analysis of the endophytic α-proteobacteria community structure indicated that the communities were mainly separated according to nutrient applications, which were positively associated with Ct values of Las and Ca, Mn, Zn, B, Mg, and Fe contents in leaf samples collected in 2012. Thus, effects of insecticides on HLB were significant in the early 2-year period whilst nutrients had significant effects on Las content and leaf size and weight after at least 3 years of application.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Relation between plant nutrition, hormones, insecticide applications, bacterial endophytes, and Candidatus Liberibacter Ct values in citrus trees infected with Huanglongbing

et al. 2013

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Citrus Root and Rhizosphere Dynamics in the Age of HLB

Rossi

Hallman

Santiago

2021

Annual Plant Reviews Online

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Huanglongbing (HLB; also known as citrus greening) is severely reducing global citrus production. HLB is a bacterial disorder caused by the vector‐transmitted pathogen Candidatus Liberibacter asiaticus ( C Las), and, as of today, it is one of the most destructive diseases facing the citrus industry of Florida and beyond. HLB in Florida was first detected in 2005 and is now widely distributed throughout the commercial citrus‐growing regions in the state. Preliminary studies have found that root systems of HLB‐tolerant rootstocks show less damage in response to C Las infection, whereas marked injury is evident soon after infection of susceptible material. An HLB‐damaged root system has poor nutrient uptake capacity, which leads to nutrient deficiencies and impairs tree performance. As of today, plant mechanisms of HLB‐tolerance are still unclear and there is no cure for HLB and root structure–function relationships remain an understudied component of the responses and may play a key role in tolerance. This review summarised all the recent studies on soil and root health of HLB‐affected citrus. Better understanding of how roots and soils are affected by HLB can potentially lead to improved management practices.

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Costs and benefits of insecticide and foliar nutrient applications to huanglongbing‐infected citrus trees

Tansey

Vanaclocha

Monzó

et al. 2016

Pest Management Science

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Vector control and foliar nutrition to maintain economic sustainability of bearing citrus in Florida groves affected by huanglongbing

Cited by 131 publications

References 17 publications

Relation between plant nutrition, hormones, insecticide applications, bacterial endophytes, and Candidatus Liberibacter Ct values in citrus trees infected with Huanglongbing

Relation between plant nutrition, hormones, insecticide applications, bacterial endophytes, and Candidatus Liberibacter Ct values in citrus trees infected with Huanglongbing

Citrus Root and Rhizosphere Dynamics in the Age of HLB

Costs and benefits of insecticide and foliar nutrient applications to huanglongbing‐infected citrus trees

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