Characteristics

Sheet lice are small insects of few millimeters of size of, only some kinds reach up to 5-6 mm. As planting Auger the animals are equipped with a And all kinds possess both winged forms, whereby the first of the mass massenvermehrung serve the landlord change by young remote generation (Parthenogenese) and the latter spreading and.

Nutrition

Since sheet lice nourish themselves of the char-hydrate-rich whereby they need however mainly the amino acids also contained in the juice, they separate typically large quantities of zuckerhaltiger solution, the so-called honey rope. This attracts often various other insects and vertebrate animals.

Vermehrung

Most kinds reproduce themselves over several generations by means of Parthenogenese, in order to then form a winged, sexually reproducing generation. This happens with landlord-changing kinds before settling the new plant host, or with a too fast growth of a sheet louse colony and the associated over population (population of over) at a place. Thus this formform form promotes at the same time also the spreading of the sheet louse, because the winged individuals are able to overcome far distances new plant hosts flying.

Researchers of the University of Jena and the there institute for Max-Planck for chemical ecology found 2005 out that the production of the winged new generation is released with up to five copies per day also by an alarm odoriferous substance, which the sheet lice discharge, if they are attacked by enemies as for example the ladybird. The beta Farnesen of alarm odoriferous substances mentioned cause that in the sheet louse colony a large unrest develops and all animals let themselves move clearly more or be fallen even from the sheet. This in such a manner released increased unrest causes now as at a over population the immediate production of winged descendants.

The sheet louse as a parasit

Apart from the immense economic damage, which can cause sheet lice in all agricultural and garden-structural cultures, they represent a substantial factor also for the hobby gardner. Their suction activity at the plants leads to yield and quality losses up to complete harvest loss. Besides the sticky deposits often secondarily lead by the honey rope separated by the lice to the settlement of blackness mushrooms, which can represent also an aesthetic problem. Sheet lice are the most important animal carriers of plant viruses. Often by the transmission of the viruses and the illness of the plants due to it by the lice caused direct sheet louse infestation outweigh begin usually unnoticed, it follow under optimal conditions for the parasit a Vermehrung like an explosion. Practically all plant types are struck. Usually one finds the lice within beschatteten ranges on blade lower surfaces and in close proximity to bloom and as well as other growth knots.

For the defense also several house means exist beside the various plant protection agents and the natural enemies. Sheet lice fed of: Ladybirds and their larvae, floating fly larvae, Florfliegenlarven, slip wasp larvae, crawler-type vehicle flies, assassin bugs, run beetles, soft beetles, spiders and birds. Ants, wasps, Hornets, Hummeln, other insects and even some vertebrate animals use the honey rope than source of food, separated by the sheet lice. Ants support sheet lice even during their spreading (symbiosis between sheet louse and ant). Ladybirds are so popular as Blattlausfresser that they are bred and as larvae/eggs are sold. As house means in particular spraying with seifigen solutions as well as Brennnesselsud is particularly to snap and obtain good success.

Systematics of the sheet lice

Sheet lice represent a very various group, which is represented also in Central Europe by a set of Taxa with family rank.

• Sheet lice
  • Tube sheet lice - Aphididae
  • Spruce lice or - Adelgidae
  • Hormaphididae
  • Dwarf lice - Phylloxeridae
  • Tree lice - Lachnidae
  • Blister lice - Pemphigidae
    • Spiralgallenlaus - Pemphigus spirothecae
  • Mindaridae
  • Mask lice - Thelaxidae
  • Anoeciidae
  • Bristle lice and - Drepanosiphiodae
  • Phloemyzidae

Related links

• Blattlaus.de - worth knowing over sheet lice as well as Tipps for fight

Articles in category "Sheet lice"

We found here 10 articles.