A new species of Dysmicoccus damaging lavender in French Provence (Hemiptera, Sternorrhyncha, Pseudococcidae)

Germain, J. F.; Matile-Ferrero, Danièle; Kaydan, Mehmet Bora; Malausa, Thibaut; Williams, D.J.

doi:10.11646/zootaxa.3980.4.7

Cited by 4 publications

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References 8 publications

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“…Flavescence dorée of grapevines, transmitted by Scaphoideus titanus Ball et al , 2014), which are prokaryotes colonizing plant phloem (Weintraub & Beanland, 2006). Phytoplasmas transmitted by insects are responsible for diseases in hundreds of plant species (Lee et al , 2000; Weintraub & Beanland, 2006), e.g., grapevine (Johannesen et al , 2008; Chuche & Thiery, 2014), lavender (Danet et al , 2010; Germain et al , 2015), maize (Jovic et al , 2007), and strawberry (Danet et al , 2003).…”

Section: Introductionmentioning

confidence: 99%

“…In Provence (southern France), the stolbur phytoplasma (transmitted by H. obsoletus ) causes a lavender and lavandin disease called ‘yellow decline’ (Danet et al , 2010; Gaudin et al , 2011; Germain et al , 2015), which is responsible for important economic losses (Gaudin et al , 2011). When infected, lavender and lavandin plants become yellow, puny, and finally die, leading to an early uprooting due to lower and non-profitable yields (uprooting after 6–7 years instead of 12–15 years).…”

Section: Introductionmentioning

confidence: 99%

“…When infected, lavender and lavandin plants become yellow, puny, and finally die, leading to an early uprooting due to lower and non-profitable yields (uprooting after 6–7 years instead of 12–15 years). This crop, grown in Provence since many generations, is adapted to dry and hot summers, and contributes €30 million per year to the local economy (Germain et al , 2015). As no curative method exists against stolbur phytoplasma, farmers grow tolerant cultivars on part of the acreages (Gaudin et al , 2011).…”

Section: Introductionmentioning

confidence: 99%

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Source of Hyalesthes obsoletus Signoret planthopper (Hemiptera: Cixiidae) in southern France and potential effects of landscape

Hossard

Guimier

Vinatier

et al. 2017

Bull. Entomol. Res.

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Cixiid planthoppers are considered of major economic importance, as they can transmit phytoplasmas responsible for many plant diseases. While thorougly studied in vineyards, the epidemiology of stolbur phytoplasma, transmitted by Hyalesthes obsoletus Signoret, was rarely investigated on minor crops as lavender, where it leads to 'yellow decline' disease and large economic losses. The objective of this paper is to understand the effect of the local landscape characteristics on the presence and density of H. obsoletus in the 'Plateau de Valensole', southern France. Potential host plants of H. obsoletus were surveyed in three contrasted zones (in terms of crops and disease intensity), by uprooting plants and capturing adults in emergence traps. The localization and potential movements of H. obsoletus from the host plants towards lavandin (infertile hybrid of lavender) were determined using yellow sticky traps. Clary sage plants were found as major hosts of H. obsoletus. Flying insects were also caught in fields of lavandin, although emergence traps and plant uprooting did not confirm this crop as a winter host, i.e., as a reservoir for the insect. Based on one zone, we showed that attractiveness may depend on crop (clary sage or lavandin) and on its age, as well as on the distance to the supposed source field. These results suggest that clary sage could be an important host of H. obsoletus, whose density largely varies between zones. Genetic studies would be required to confirm the role of clary sage in the dissemination of yellow decline of lavandin.

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