Ditylenchus


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Ditylenchus

 

a genus of roundworms, or nematodes, of the family Tylenchidae. The body is long, thin, and pointed. Adult worms are 0.8–1.5 mm long and 0.02–0.03 mm in diameter. The entire life cycle is passed in plant tissues. The most dangerous species are D. destructor, which infests potatoes, and D. dipsaci, which infests onions, garlic, parsnip, parsley, tomatoes, clover, and cereal grains. The nematodes attack bulbs, tubers, rhizomes, and stems. When the infected plant dies, the worms either drop onto the soil and search for a new host or remain in the tissues of the dead plant. The worms can be controlled by returning affected crops to their former position in the crop rotation no more often than once every three years.

REFERENCE

Kir’ianova, E. S., and E. L. Krall’. Paraziticheskie nematody raslenii imery bor’by s nimi, vol. 2. Leningrad, 1971.
References in periodicals archive ?
sibthorpii were Chiloplacus, Malenchus and Ditylenchus, although not in the same order.
We should note, however, that among the most abundant nematode genera of our site, the bacterivores Chiloplacus, Acrobeloides and Plectus and the fungivores Aphelenchoides, Ditylenchus and Aphelenchus are very common general opportunists, and are repeatedly reported as resistant to heavy metal pollution of soils (e.
The only non-fungal ITS sequence obtained from one of these dauers was also of poor quality with many ambiguous base calls; the closest match was to Ditylenchus sp.
Aphelenchoides composticola and Ditylenchus myceliophagus) may be present in the compost and feed directly on mushroom mycelium.
Fungivorous genera included Aphelenchus, Aphelenchoides, Ditylenchus, and Nothotylenchus.
There were no taxa that were unique to shifting sand dunes; the first colonisers after planting vegetation since sand dune stabilisation were Tylenchorhynchus, Nothotylenchus, Panagrolaimus, and Psilenchus; colonisers after 26 years were Acrobeloides, Acrobeles, Aphelenchoides, Cervidellus, Discolaimus, Eudorylaimus, Leptonchus, and Thorneella; colonisers in sand dunes stabilised for 43 years and 51 years were Aphelenchus, Chiloplacus, Discolaimium, Ditylenchus, Ecumenicus, Filenchus, Labronema, Miconchus, Plectus, and Rotylenchus (Fig.
3 Avermectin Controls Ditylenchus Destructor Effectively
Cephalenchus, Ditylenchus, Pungentus, Doryllium, Acrobeloides, Tripyla, and Dorylaimus were low in abundance and were detected in fewer than two treatments Microfuana Low BD Low N M MW MI MWI Tylenchus 0 45 321 0 Hoplolaimidae 0 0 458 631 Pratylenchus 0 0 92 45 Paratylenchus 0 0 687 586 Aphelenchoides 91 564 458 135 Diplogaster 272 451 1282 226 Rhabditidae 1610 1894 4441 1894 Dauerlarvae 159 0 641 271 Panagrolaimus 91 451 504 135 Cephalobus 45 0 4029 90 Heterocephalobus 0 0 92 0 Plectus 0 23 0 0 Monhvstera 0 45 92 0 Total nematodes 2268 3540 13416 4014 NCR 0.
Host-feeding tests were also conducted from 1995 to 1997 with a foliar and stem-galling nematode Ditylenchus phyllobius (Thorne) Filipje, and two leaf-beetles Leptinotarsa texana Schaeffer and Leptinotarsa defecta Stal from Texas (Cuda et al.