http://www.collembola.org/publicat/ilvo.htm - Last updated on 2007.03.20 by Frans Janssens
Checklist of the Collembola: Contribution to the knowledge of Collembola in the lettuce horticulture from Flanders, Belgium

Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium
Johan Witters, Institute for Agricultural and Fisheries Research, Entomologie/Acarologie, Merelbeke, B-9820, Belgium

Abstract

In the context of an invertebrate survey held by the 'Institute for Agricultural and Fisheries Research (Instituut voor Landbouw- en Visserijonderzoek' (ILVO)) and the `Research Station for Vegetable Production npo (Proefstation voor de Groenteteelt vzw)' several horticultural sites in the region of Flanders, Belgium were sampled in 2006 and 2007. Ten glasshouses were observed by using the pitfall trap technique. During this period more than XX pitfall traps were examined on the occurrence of Collembola and their natural predators in lettuce. The isolated artropods were identified in 5 ordo: Acari, Araneae, Coleoptera, Diptera and Collembola. Species determination of Collembola was done by the University of Antwerp. Out of 5 Collembola species, 1 species (viz. Heteromurus major) was new for the Belgian fauna.

More coming soon...

Samenvatting

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Keywords: Collembola, lettuce, horticulture, ..., Belgium

Contineously being revised.

Introduction

The study of Collembola in lettuce fits in a larger context namely "Biological control of Collembola in protected crops". Although they are not harmful for lettuce, the occurrence of Collembola decreases the market price what results in an important economical loss for the lettuce-growers. To get a better knowledge about the occurrence of Collembola in glasshouses a survey was carried out by the Institute for Agricultural and Fisheries Research (ILVO) and the Research Station for Vegetable Production in 2006 and 2007.

Stations

The samples were taken in glasshouses (table1) from end July 2006 to end June 2007, in order to collect data of a full year time span. In total, 10 sites were sampled whereas in 4 sites (marked in bold in table 1) a high density of Collembola was noticed in 2004 and 2005.

LocationStationCodeUTMDescription
EmblemSmeuninx?II?or?III?FS1269Tba
OLV WaverVerschaerenIFS1058Tba
VraseneD'Hollander-Van DoorenVES8375Tba
KruibekeHType x?Tba
EmblemM?IV??Tba
BroechemIM??Tba
St-Kat_WaverD??Tba
BroechemB1??Tba
BroechemB2??Tba
NijlenD??Tba
Tab. 1. Location of stations.

Methods and techniques

Specimens have been collected using the pitfall trap method based on Pietraszko & de Clercq (1980) and Powell et al (1996). Round plastic pots with a diameter of 10 cm were buried so that its open top lies flush with the soil surface. On each station 5 traps were placed between the lettuce plants 1m from the path and 6,4m from each other. The pitfall traps were filled with 1% formaldehyde solution to which a surfactant (1% Triton-X-100) was added to decrease the surface tension of the preservative. Each trap was covered with a plastic plate to reduce flooding problems during the irrigation. During each growth cycle, the pitfall traps were emptied 3 times, more specific a week after planting the seedlings, in the middle of the growth cycle and a week before harvest. To collect the arthropods in the pitfall trap, the content of it was poured over a sieve (250μm). The filtrate was used again as preservative. The residue was recollected in an ethanol solution for further examination in the laboratory.

The Collembola specimens were presorted by morphospecies using binocular microscope. Final determination was done using binocular and phase-contrast compound microscope. Specimens are stored in ethanol 70% tubes.
Some specimens are mounted in a drop of Hoyer medium on standard object slides, and covered with a square cover glass of 18x18 mm. After drying for a week at room temperature, the cover glasses are 'ringed' with transparant nail polish to seal the Hoyer medium.
The specimens are deposited in the UA collection.

Systematic list of species

The identifications have been done with the help of Gisin (1960), Fjellberg (1998, 2003). The nomenclature is based on Bellinger, Christiansen & Janssens (1996-2007).

Legend of the columns
 1Provence
 2Station (for more details see table 1)
 3UTM (10 x 10 km)
 4Date (year - month - day)
 5Number of specimens (adult, example, female, juvenile, male)
 6Name of legit
 7Name of determinator
 8Collection(s) where the specimens are deposited

Inventory

Familia Hypogastruridae Börner, 1906

Hypogastrura manubrialis (Tullberg, 1869:9) Linnaniemi, 1912

   Ant  Emblem IV             FS16 2005-07-05 15e       ILVO                   Janssens F             Witters J @UA
   Ant  Emblem III            FS16 2005-07-24 4j        ILVO                   Janssens F             Witters J @UA
   Ant  Emblem III            FS16 2005-07-24 12e       ILVO                   Janssens F             Witters J @UA

Ceratophysella denticulata (Bagnall, 1941) Stach, 1949

   Ant  OLV Waver I           FS15 2005-07-28 4a        ILVO                   Janssens F             Witters J @UA
   Ant  OLV Waver I           FS15 2005-07-28 40e       ILVO                   Janssens F             Witters J @UA

Familia Isotomidae Schäffer, 1896

Proisotoma minuta (Tullberg, 1871) Börner, 1903

   Ant  Emblem IV             FS16 2005-07-05 5e        ILVO                   Janssens F             Witters J @UA
   Ant  Emblem III            FS16 2005-07-24 4j        ILVO                   Janssens F             Witters J @UA
   Ant  Emblem III            FS16 2005-07-24 4j        ILVO                   Janssens F             Witters J @UA

Isotoma caerulea Bourlet, 1839

   Ant  Emblem II             FS16 2005-07-24 1a        ILVO                   Janssens F             Witters J @UA
   Ant  Emblem II             FS16 2005-07-24 1a        ILVO                   Janssens F             Witters J @UA
   Ant  Emblem II             FS16 2005-07-24 1a        ILVO                   Janssens F             Witters J @UA

Familia Entomobryidae Schött, 1891, sensu Deharveng, L, 2004:427

Heteromurus major (Moniez, 1889) Absolon, 1901

   OVl  Vrasene V             ES87 2005-07-31 2a        ILVO                   Janssens F             Witters J @UA
   OVl  Vrasene V             ES87 2005-07-31 2a        ILVO                   Janssens F             Witters J @UA

Discussion

Coming soon...

Acknowledgements

Comming soon...

Bibliography