You are using an old browser that may not function as expected.
For a better, safer browsing experience, please upgrade your browser.

Log in Become a Member

Stiletto Valleys

German name for a species of nematode; see there.

These nematodes (eelworms, roundworms, trichinae) are among the most species- and individual-rich animal group in the world, with 20,000 different species. Most are very small, ranging from 0.1 to around one millimetre (the largest species, at over 8 m, lives in the sperm whale placenta). Unlike more highly developed arthropods (such as the earthworm), they have no vessels. Usually there are males and egg-laying females, but occasionally there is also a sexless virgin-breeding (pathenogesis). Four larval moults are undergone until sexual maturity. Feeding takes place through a hollow mouth spine that moves rhythmically while sucking. They live with numerous species in the soil and also feed on bacteria or fungi, which is a positive element in the ecological system of a vineyard soil.

Nematoden - Graphik

As a pest in the vineyard

In the 1930s, they were recognised as a pest of the grapevine; until then, phylloxera had been mistakenly assumed. In the vineyard, two groups in particular occur, which are very dangerous for the...

Voices of our members

Dominik Trick

The wein.plus encyclopaedia is a comprehensive, well-researched reference work. Available anytime and anywhere, it has become an indispensable part of teaching, used by students and myself alike. Highly recommended!

Dominik Trick
Technischer Lehrer, staatl. geprüfter Sommelier, Hotelfachschule Heidelberg

The world's largest Lexicon of wine terms.

26,385 Keywords · 46,991 Synonyms · 5,323 Translations · 31,719 Pronunciations · 202,830 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon