Abstract
Abstract The root-knot nematode, Meloidogyne enterolobii, is a major disease of guava, Psidium guajava, in Brazil and other countries. Egg-pathogenic fungi are considered potential biological control agents of root-knot nematodes and are associated with suppression of Meloidogyne spp. Glasshouse experiments were conducted in order to evaluate the effect of the fungi Paecilomyces lilacinus and Pochonia chlamydosporia on a population of M. enterolobii growing on guava plants. Guava seedlings of about 15-20 cm growing in plastic bags were inoculated with 10 000 eggs of M. enterolobii plant−1. Two months later, three isolates of P. lilacinus and one isolate of P. chlamydosporia were inoculated in the infested plants. The effect of the treatments was evaluated 6 months later. Although plant infection by nematodes was not attenuated, the number of eggs (g roots)−1 fell significantly. The number of egg masses infected with the fungi was inversely correlated with the number of eggs found in the roots. The most effective result (61.5% of control) was obtained with the isolate CG1003 of P. chlamydoporia, which was originally isolated from eggs of M. enterolobii in Brazil, followed by P. lilacinus (CG959 and CG1038) with about 40% of control. These fungi showed the ability to colonise healthy guava roots in glasshouse experiments. These results suggest that P. chlamydosporia can be selected as a potential biological control agent to be employed with other strategies in integrated management to control M. enterolobii on guava.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Plant infection by Meloidogyne enterolobii was not attenuated by the fungal treatments.
- Taxon
- guava
Psidium guajavae1 - Treatment
- the fungi Paecilomyces lilacinus and Pochonia chlamydosporiae1
- Interactor
- M. enterolobii
_5384315.jpg?width=60)
Meloidogyne enterolobiie1pathogen - Second interactor
- Paecilomyces lilacinus
Purpureocillium lilacinume1biocontrol_agent - Outcome
- plant infection by nematodese0
- Direction
- not attenuatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_5384315.jpg?width=500)
Verbatim
e0“Although plant infection by nematodes was not attenuated”
e1“evaluate the effect of the fungi Paecilomyces lilacinus and Pochonia chlamydosporia on a population of M. enterolobii growing on guava plants”
Claim · model-written summary
The number of nematode eggs per gram of roots fell significantly after fungal inoculation.
- Taxon
- guavaPsidium guajavae1
- Treatment
- the fungi Paecilomyces lilacinus and Pochonia chlamydosporiae1
- Interactor
- M. enterolobiiMeloidogyne enterolobiie1pathogen
- Second interactor
- Paecilomyces lilacinusPurpureocillium lilacinume1biocontrol_agent
- Outcome
- number of eggs (g roots)−1e0
- Direction
- felle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of eggs (g roots)−1 fell significantly”
e1“evaluate the effect of the fungi Paecilomyces lilacinus and Pochonia chlamydosporia on a population of M. enterolobii growing on guava plants”
Claim · model-written summary
The number of egg masses infected with the fungi was inversely correlated with the number of eggs found in the roots.
- Taxon
- guavaPsidium guajavae1
- Organ / stage
- rootse0
- Interactor
- M. enterolobiiMeloidogyne enterolobiie1pathogen
- Second interactor
- Paecilomyces lilacinusPurpureocillium lilacinume1biocontrol_agent
- Outcome
- number of eggs found in the rootse0
- Direction
- inversely correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of egg masses infected with the fungi was inversely correlated with the number of eggs found in the roots”
e1“evaluate the effect of the fungi Paecilomyces lilacinus and Pochonia chlamydosporia on a population of M. enterolobii growing on guava plants”
Claim · model-written summary
The most effective result (61.5% of control) was obtained with isolate CG1003 of P. chlamydosporia.
- Taxon
- guavaPsidium guajavae1
- Treatment
- the isolate CG1003 of P. chlamydoporiae0
- Interactor
- M. enterolobiiMeloidogyne enterolobiie1pathogen
- Second interactor
- P. chlamydoporiae0biocontrol_agent
- Outcome
- most effective resulte0
- Direction
- most effective resulte0
- Value
- 61.5% of controle0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most effective result (61.5% of control) was obtained with the isolate CG1003 of P. chlamydoporia”
e1“evaluate the effect of the fungi Paecilomyces lilacinus and Pochonia chlamydosporia on a population of M. enterolobii growing on guava plants”
Claim · model-written summary
P. lilacinus isolates CG959 and CG1038 gave about 40% of control, after the CG1003 isolate.
- Taxon
- guavaPsidium guajavae1
- Treatment
- P. lilacinus (CG959 and CG1038)e0
- Interactor
- M. enterolobiiMeloidogyne enterolobiie1pathogen
- Second interactor
- P. lilacinusPurpureocillium lilacinume0biocontrol_agent
- Outcome
- followed bye0
- Direction
- followed bye0
- Value
- about 40% of controle0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by P. lilacinus (CG959 and CG1038) with about 40% of control”
e1“evaluate the effect of the fungi Paecilomyces lilacinus and Pochonia chlamydosporia on a population of M. enterolobii growing on guava plants”
Claim · model-written summary
The fungi showed the ability to colonise healthy guava roots in glasshouse experiments.
- Taxon
- guavaPsidium guajavae0
- Organ / stage
- rootse0
- Outcome
- ability to colonise healthy guava rootse0
- Setting
- glasshouse experimentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These fungi showed the ability to colonise healthy guava roots in glasshouse experiments”
Claim · model-written summary
The authors suggest P. chlamydosporia can be selected as a potential biological control agent within integrated management of M. enterolobii on guava.
- Taxon
- guavaPsidium guajavae0
- Interactor
- M. enterolobiiMeloidogyne enterolobiie0pathogen
- Second interactor
- P. chlamydosporiaPochonia chlamydosporiae0biocontrol_agent
- Outcome
- potential biological control agente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. chlamydosporia can be selected as a potential biological control agent to be employed with other strategies in integrated management to control M. enterolobii on guava”
The same questions in other papers
Pochonia chlamydosporia · Meloidogyne enterolobii · Psidium guajava (guava)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.