Valid Names Results

Dysmicoccus lavandulae Germain, Matile-Ferrero & Williams, 2015 (Pseudococcidae: Dysmicoccus)

Nomenclatural History

• Dysmicoccus lavandulae Germain, Matile-Ferrero & Williams 2015: 577-582. Type data: FRANCE, Drome, Vesc, on Lavandula x intermedia, 8/13/2009, by M. Saussac.. Holotype, female, by original designation Type depository: Paris: Museum National d'Histoire naturelle, France; accepted valid name Notes: Paratypes: same data as holotype, 3 adult females on 3 slides (Anses-LSV, 1 slide, BMNH 1 slide; MBK 1 slide); Drome, Dieulefit, on Lavandula x intermedia, R. Bonnaure, 26.VI.2010, 12 adult females on 5 slides (Anses-LSV: 2 slides with 5 adult females; BMNH 1 slide with 2 adult females; MBK 1 slide with 2 adult females; MNHN 1 slide with 3 adult females); same data, R. Bonnaure, 13.V.2011, 2 slides with 1 adult female and 6 2nd instar females) (Anses-LSV); same data, R. Bonnaure, 31.V.2011, 5 adult females on 5 slides (Anses-LSV); same data, R. Bonnaure, 31.V.2011, 6 adult females on 6 slides (Anses-LSV 3 slides; BMNH 1 slide; MBK 1 slide; MNHN 1 slide); same data, R. Bonnaure, 8.VI.2011, 2 adult females on 2 slides (Anses-LSV); Dieulefit, Marroux, on L. x intermedia, D. Matile-Ferrero & J.-F. Germain, 16.VI.2011, 1 adult female (MNHN). Illustr.

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• DanzigGa2015: pp.70-71 ( Adult (F) ) [Palaearctic Dysmicoccus species]

Remarks

• Systematics: This species is placed in Dysmicoccus Ferris and belongs to a group with a reduced number of cerarii and two sizes of oral collar tubular ducts on the dorsum and venter. This group differs from Trionymus Berg, a genus regarded as restricted to species with only 1–3 pairs of cerarii. In usually possessing 12 (range 10-13) pairs of cerarii, D. lavandulae is similar to D. pietroi Marotta, a species possessing 13 pairs of cerarii but which also has ventral multilocular disc pores on segment V (absent on this segment in D. lavandulae), and noticeably more tubular ducts on both the dorsum and venter. Dysmicoccus lavandulae is also similar to some species presently included in Trionymus. Pending further research, the authors of the species believe that D. lavandulae is also related to D. multivorus (Kiritchenko), described originally as Pseudococcus multivorus, now a widespread species in Europe (and recorded from France by Panis (1999) and neighboring parts of Asia. However, D. multivorus, as discussed by Ter-Grigorian (1973), Tereznikova (1975) and Danzig (1997), usually possesses only 4–6 pairs of cerarii.
• Structure: Body of live specimens greyish, devoid of wax with 2 short caudal wax filaments. Purplish blue in aalcohol 70° (Fig. 3a), becoming immediately brown in cold KOH and then reddish brown 3 hours later. Slide-mounted adult female (Fig. 3b and 3c) elongate oval, 1.44–2.96 mm long; anal lobes moderately developed, each with an apical seta 120–180 μm long. Antennae each 350–450 μm long, with 8 segments. Legs well developed.
• Economic Importance: In the early 1980s, a mealybug was observed in the Alpes-de-Haute-Provence Department but has spread throughout the south-east, causing 45% loss of lavender essence production. Panis (1999) published some biological field studies, identifying the species as Dysmicoccus multivorus (Kiritchenko, 1936). Following a resurgence of the problem since 2009, it was determined that this new species develops on the spike and the flower buds, feeding at the base, and isremarkably elongate, as opposed to the broadly-oval Dysmicoccus multivorus. It causes leaf distortion after feeding (Fig. 1). After the lavender has been harvested, any remaining mealybugs move to the lower parts of the stems, sometimes inside the hollow stems or even to the roots.
• General Remarks: Detailed description, illustration, photographs and DNA analysis in Germain, et al., 2015.

Illustrations

Citations