Absence of windbreaks and replanting citrus in solid sets increase density of Asian citrus psyllid populations

Martini, Xavier; Pelz‐Stelinski, Kirsten S.; Stelinski, Lukasz L.

doi:10.1016/j.agee.2015.06.027

Cited by 34 publications

(34 citation statements)

References 35 publications

(48 reference statements)

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“…Urban areas might also have more unmanaged hosts of D. citri such as Murraya , Bergera and Severinia , which are common ornamental plants. Additionally, urban environments have fewer living windbreaks, a landscape element that is known to reduce population densities of D. citri (Martini et al , ). Understanding how D. citri overwinters in Florida has important implications for management of HLB.…”

Section: Discussionmentioning

confidence: 99%

Patterns of habitat use by the Asian citrus psyllid,Diaphorina citri, as influenced by abiotic and biotic growing conditions

et al. 2016

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1 The Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Liviidae) is an economically important pest of citrus throughout Asia and the Americas because it transmits Candidatus Liberibacter asiaticus (CLas), which is the presumed causal agent of citrus greening disease. 2 We investigated whether biotic and abiotic characteristics can be used to predict Diaphorina citri population abundance and assessed whether agricultural intensity explained the distribution of D. citri populations during winter dormant periods (December to March). 3 Over two consecutive winters, we examined the abundance of D. citri in groves throughout Florida in response to four different management regimes, defined as: conventional, intermittent, unmanaged and organic. 4 During both years, the winter abundance of D. citri in groves with intermittent management was greater than in groves with other management regimes. Latitude and row orientation both had a significant effect on psyllid density during winter. Diaphorina citri abundance was higher when more than 20% of the surrounding landscape was urbanized. 5 These findings suggest that only conventional management of groves reduced D.citri populations during winter periods. By contrast, intermittent management was associated with higher D. citri populations. These results might be of some concern in light of the economic and environmental costs of repeated insecticide applications and the dramatic decline of citrus production in the U.S.A.

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Section: Discussionmentioning

confidence: 99%

Patterns of habitat use by the Asian citrus psyllid,Diaphorina citri, as influenced by abiotic and biotic growing conditions

et al. 2016

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“…DNA from three leaves per tree were isolated using the CTAB procedure adapted for citrus leaves (Martini et al, 2015). The concentration and purity of the extracted DNA were measured with a spectrophotometer (Nano Drop 2000;Thermo Fisher Scientific, Waltham, Massachusetts).…”

Section: Detection Of Clas In Plant Samplesmentioning

confidence: 99%

Drought stress affects response of phytopathogen vectors and their parasitoids to infection‐ and damage‐induced plant volatile cues

Martini

Stelinski

2017

Ecological Entomology

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1. The response of a phytopathogen vector to pathogen‐induced plant volatiles was investigated, as well as the response of the phytopathogen vector's parasitoid to herbivore‐induced plant volatiles released from plants with and without drought stress. 2. These experiments were performed with Asian citrus psyllid (Diaphorina citri), vector of the plant pathogen Candidatus Liberibacter asiaticus (CLas) and its parasitoid Tamarixia radiata as models. Candidatus Liberibacter asiaticus is the presumed causal pathogen of huanglongbing (HLB), also called citrus greening disease. 3. Diaphorina citri vectors were attracted to headspace volatiles of CLas‐infected citrus plants at 95% of their water‐holding capacity (WHC); such attraction to infected plants was much lower under drought stress. Attraction of the vector to infected and non‐stressed plants was correlated with greater release of methyl salicylate (MeSA) as compared with uninfected and non‐stressed control citrus plants. Drought stress decreased MeSA release from CLas‐infected plants as compared with non‐stressed and infected plants. 4. Similarly, T. radiata was attracted to headspace volatiles released from D. citri‐infested citrus plants at 95% of their WHC. However, wasps did not show preference between headspace volatiles of psyllid‐infested and uninfested plants when they were at 35% WHC, suggesting that herbivore‐induced defences did not activate to recruit this natural enemy under drought stress. 5. Our results demonstrate that herbivore‐ and pathogen‐induced responses are environmentally dependent and do not occur systematically following damage. Drought stress affected both pathogen‐ and herbivore‐induced plant volatile release, resulting in concomitant decreases in behavioural response of both the pathogen's vector and the vector's primary parasitoid.

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“…For our other parameters, such as feeding rate, extrinsic incubation period, and probability of successful transmission between tree and psyllid (and vice versa), we obtained data from a variety of sources including Pelz-Stelinski et al (2010), Hall & Albrigo (2007), Gottwald (2010) and Martini, Pelz-Stelinski & Stelinski (2015). For full details of parameter values and their sources, see Table S1.2.…”

Section: A Parameterized Hlb Model That Considers Economic Costs and mentioning

confidence: 99%

“…However, before controls can be implemented in the field they need to be tested for efficacy. There are presently tens if not hundreds of hypothetical interventions that could be tested, including: antibiotics (Zhang et al, 2014), pesticides (Qureshi, Kostyk & Stansly, 2014), biocontrol agents (Michaud, 2002), heat treatment (Hoffman et al, 2013), new tolerant or resistant tree stocks (Dutt et al, 2015), nutrient additions (Gottwald et al, 2012), tree removal (Gottwald, 2010), changes to tree spacing (Martini, Pelz-Stelinski & Stelinski, 2015), intercropping (Gottwald et al, 2014), and psyllid deterrents and barriers (Tisgratog et al, 2016; Tomaseto, Krugner & Lopes, 2016). Even more daunting are the different factorial combinations of interventions to test.…”

Section: Introductionmentioning

confidence: 99%

Mathematical models are a powerful method to understand and control the spread of Huanglongbing

Taylor

Mordecai

Gilligan

et al. 2016

PeerJ

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Huanglongbing (HLB), or citrus greening, is a global citrus disease occurring in almost all citrus growing regions. It causes substantial economic burdens to individual growers, citrus industries and governments. Successful management strategies to reduce disease burden are desperately needed but with so many possible interventions and combinations thereof it is difficult to know which are worthwhile or cost-effective. We review how mathematical models have yielded useful insights into controlling disease spread for other vector-borne plant diseases, and the small number of mathematical models of HLB. We adapt a malaria model to HLB, by including temperature-dependent psyllid traits, “flushing” of trees, and economic costs, to show how models can be used to highlight the parameters that require more data collection or that should be targeted for intervention. We analyze the most common intervention strategy, insecticide spraying, to determine the most cost-effective spraying strategy. We find that fecundity and feeding rate of the vector require more experimental data collection, for wider temperatures ranges. Also, the best strategy for insecticide intervention is to spray for more days rather than pay extra for a more efficient spray. We conclude that mathematical models are able to provide useful recommendations for managing HLB spread.

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Absence of windbreaks and replanting citrus in solid sets increase density of Asian citrus psyllid populations

Cited by 34 publications

References 35 publications

Patterns of habitat use by the Asian citrus psyllid,Diaphorina citri, as influenced by abiotic and biotic growing conditions

Patterns of habitat use by the Asian citrus psyllid,Diaphorina citri, as influenced by abiotic and biotic growing conditions

Drought stress affects response of phytopathogen vectors and their parasitoids to infection‐ and damage‐induced plant volatile cues

Mathematical models are a powerful method to understand and control the spread of Huanglongbing

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