Pratylenchus penetrans
| Pratylenchus penetrans | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pratylenchus penetrans |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Pratylenchus penetrans | ||||||||||||
| Cobb , 1917 |
Pratylenchus penetrans is a roundworm species. It is a migratory plant parasite that burrows into the roots of the host plants.
description
The adult root nematode becomes less than a millimeter long. The head is flattened with two, three or four rings. A hydroskeleton of the head is differentiated from that of the body, and a delineation between head and torso is weakly recognizable from the outside.
There is a clear central bulge in the intestinal cavity. Rear flaps made of glandular tissue cover the abdominal cavity.
The females have a rear vulva with a gonad in front and a short vaginal sac. The rear end of the worm is cylindrical to conical. Males have a conical end with an easily recognizable bursa copulatrix that extends all the way to the tip of the worm end.
The number of chromosomes is n = 12.
Life cycle
Pratylenchus penetrans is a migratory endoparasite. Like all nematodes, it reproduces sexually. The female lays eggs in plant roots or in the ground.
After hatching, the young root nematodes moult three times until they are sexually mature themselves. The entire life cycle lasts 30 to 86 days and is highly temperature-dependent. They live the shortest at 30 ° C.
Both adults and young animals bored into the roots of plants. This usually happens in the elongation zone of the root.
distribution and habitat
Pratylenchus penetrans is mainly native to the temperate zone. Finds have been reported from the United States, across Europe, Australia, Canada, Egypt, India, Japan, New Zealand, Peru, the Philippines, Russia, and South Africa.
Pratylenchus penetrans has more than 350 host plants on which it feeds, including many cultivated plants such as apples, cherries and other fruit trees. But roses, tomatoes, potatoes, corn, sugar cane, lilies and many other plants also serve as hosts.
Web links
- - Pratylenchus penetrans– The Root-Lesion Nematode ( Memento of August 7, 2008 in the Internet Archive ) (English)
- Nemaplex, University of California - Pratylenchus penetrans (English)
- Nematodes in organic vegetable production (PDF; 1 MB)
literature
- Ulrich Zunke (1990): Observations on the Invasion and Endoparasitic Behavior of the Root Lesion Nematode Pratylenchus penetrans , Journal of Nematology 22 (3), pp. 309-320; with the film: Ulrich Zunke & Institute for Scientific Film (1988): Behavior of the root lesion nematode Pratylenchus penetrans. Film C 1676 by the Institute for Scientific Film, Göttingen.