Nematodes in relation to plant growth. III. Pratylenchus penetrans (Cobb) in tree crops, potatoes and red clover.

Authors

  • M. Oostenbrink

DOI:

https://doi.org/10.18174/njas.v9i3.17620

Abstract

The results of five rotation and fumigation experiments together with additional field surveys show that Pratylenchus penetrans is a serious cause of sickness symptoms and has crop rotational effects on many woody plants, red clover and potatoes. It is wide-spread in light and medium soils especially in nurseries and fruit orchards; 9% of the fields examined contained more than 100 specimens per 100 ml. of soil. Results demonstrate a significant linear relationship between the log. of initial population density or of population density within roots and growth deficit of susceptible crops. There was some indication that heavy infestations of P. penetrans in red clover roots impaired nitrogen fixation. The cultivation of rye, oats and red clover should be avoided in infested land as they are good hosts. Beet or mangolds are advised to be grown on infested arable land just before potatoes or red clover as they suppress P. penetrans. Nematicides give effective control of P. penetrans but their cost restricts their use to land growing valuable crops. Other plant nematode relationships indicated by the results were that grass, red clover, oats, rye, and swede were efficient hosts of Tylenchorhynchus dubius; red clover was a good host of Rotylenchus robustus; potatoes were a better host for Meloidogyne hapla than red clover, mangold or oats; mangold was an efficient host of P. neglectus but suppressed P. penetrans and P. crenatus; mangold and grass were efficient hosts of Paratylenckus spp. D.J.H. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1961-08-01

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Papers