[Occurrence of Nematoda, Tylenchulus semipenetrans Cobb, 1913 on the coastal part of Montenegro [Yugoslavia]]
1988
Vucinic, Z. | Tiodorovic, J. (Poljoprivredni institut, Titograd (Yugoslavia))
Citrus nematode, Tylenchulus semipenetrans was discovered for the first time in 1980, on roots of Poncirus trifoliata seedlings in vegetation, in Bar on the Montenegro coast (Yugoslavia). On the infected seedlings, chlorosis appeared first and then drying (the top part first and then withering of young plants). Sex dimorphism is observed with T. semipenetrans. Males were wormlike whereas the body of sexually mature females is ventrally extended. Their front part penetrates the plant tissue and the back part protrudes. Life ciclus, passing through several stages, lasts 6-8 weeks. Development of T. semipenetrans is influenced by the composition, humidity and pH of the soil as well as the vitality of citrus. It is transmitted by the soil, irrigation water and tools but most usually by nursery plants. Besides using healthy nursery plants for the control of this nematode, some nematocides for soil disinfection can be used for the prevention but also on already infected citruses. For economic reasons, their application is limited mostly to nurseries.
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