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Host status of green manures for two isolates of Pratylenchus brachyurus in Brazil

Host status of green manures for two isolates of Pratylenchus brachyurus in Brazil AbstractDue to the complexity of management of plant-parasitic nematodes in cashcrops, the use of non-chemical methods, such as rotation with green manures,has increased in recent years. However, data about the host status of greenmanures for lesion nematodes are scarce. Thus, two glasshouse trials werecarried out to evaluate the host status of some green manures for twoisolates of Pratylenchus brachyurus, a root-lesion nematode often foundattacking soybean, maize and cotton in Brazil. Green manures tested werepigeon pea (Cajanus cajan) cultivars Fava Larga and Iapar 43, Crotalariajuncea, C. spectabilis, C. mucronata, C. breviflora, C. ochroleuca, C.paulina, velvetbean (Mucuna pruriens) cvs Black, Dwarf and Gray. Soybean cv.Pintado and French marigold (Tagetes patula) were included as standard goodand poor hosts for P. brachyurus. In a separate glasshouse experiment, anaturally infested soil was used to evaluate the suitability of two greenmanures to P. brachyurus in comparison with two gramineaceous cover crops.In addition, morphometric studies were carried out with the two isolates ofP. brachyurus used in experiments in order to confirm the species. Among the11 green manures tested, at least two, C. spectabilis and C. breviflora, canbe useful as rotation crops to reduce population densities of P. brachyurus,irrespective of the origin of the nematode. By contrast, all velvetbeancultivars and C. juncea must be avoided in infested areas as they are goodhosts for the nematode. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematology Brill

Host status of green manures for two isolates of Pratylenchus brachyurus in Brazil

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1388-5545
eISSN
1568-5411
DOI
10.1163/156854107782331153
Publisher site
See Article on Publisher Site

Abstract

AbstractDue to the complexity of management of plant-parasitic nematodes in cashcrops, the use of non-chemical methods, such as rotation with green manures,has increased in recent years. However, data about the host status of greenmanures for lesion nematodes are scarce. Thus, two glasshouse trials werecarried out to evaluate the host status of some green manures for twoisolates of Pratylenchus brachyurus, a root-lesion nematode often foundattacking soybean, maize and cotton in Brazil. Green manures tested werepigeon pea (Cajanus cajan) cultivars Fava Larga and Iapar 43, Crotalariajuncea, C. spectabilis, C. mucronata, C. breviflora, C. ochroleuca, C.paulina, velvetbean (Mucuna pruriens) cvs Black, Dwarf and Gray. Soybean cv.Pintado and French marigold (Tagetes patula) were included as standard goodand poor hosts for P. brachyurus. In a separate glasshouse experiment, anaturally infested soil was used to evaluate the suitability of two greenmanures to P. brachyurus in comparison with two gramineaceous cover crops.In addition, morphometric studies were carried out with the two isolates ofP. brachyurus used in experiments in order to confirm the species. Among the11 green manures tested, at least two, C. spectabilis and C. breviflora, canbe useful as rotation crops to reduce population densities of P. brachyurus,irrespective of the origin of the nematode. By contrast, all velvetbeancultivars and C. juncea must be avoided in infested areas as they are goodhosts for the nematode.

Journal

Nematology – Brill

Published: Jan 1, 2007

Keywords: ROOT-LESION NEMATODE; NEMATODE MANAGEMENT; CONTROL

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