Phosphite alters the behavioral response of potato tuber moth (Phthorimaea operculella) to field-grown potato.
Phthorimaea operculella
intercropping
olfactometer
phosphite
plant resistance inducer
β-amino butyric acid
Journal
Pest management science
ISSN: 1526-4998
Titre abrégé: Pest Manag Sci
Pays: England
ID NLM: 100898744
Informations de publication
Date de publication:
Mar 2019
Mar 2019
Historique:
received:
05
02
2018
revised:
19
07
2018
accepted:
19
07
2018
pubmed:
27
7
2018
medline:
24
4
2019
entrez:
27
7
2018
Statut:
ppublish
Résumé
The potato tuber moth (PTM) (Phthorimaea operculella) is a pest of solanaceous species that causes serious damage to potato tubers and tomato fruits. Control is mainly dependent on the use of synthetic chemicals, which pose a risk to the environment and health of farmers, especially in developing countries where application safety rules are often neglected. In this study we aimed at investigating the effects of a plant resistance inducer (PRI) potassium phosphite on PTM larval population density and PTM parasitoid levels, which can be used as biocontrol agents. We also tested whether intercropping with tomato, which is less attractive to PTM, provided a spatial border to further reduce PTM numbers. In two different locations over two seasons, we showed that foliar application of phosphite more than halved the PTM larval populations on potato, and that PTM parasitoid numbers were unaffected. No consistent reduction in PTM was achieved by intercropping potato with tomato. Phosphite reduced PTM numbers in the field without interfering with autochthonous parasitoids, indicating its suitability as part of an Integrated Pest Management strategy. Ex situ choice tests showed that phosphite-treated potato deterred PTM, which could be a reason for the control of PTM in the field. © 2018 Society of Chemical Industry.
Sections du résumé
BACKGROUND
BACKGROUND
The potato tuber moth (PTM) (Phthorimaea operculella) is a pest of solanaceous species that causes serious damage to potato tubers and tomato fruits. Control is mainly dependent on the use of synthetic chemicals, which pose a risk to the environment and health of farmers, especially in developing countries where application safety rules are often neglected. In this study we aimed at investigating the effects of a plant resistance inducer (PRI) potassium phosphite on PTM larval population density and PTM parasitoid levels, which can be used as biocontrol agents. We also tested whether intercropping with tomato, which is less attractive to PTM, provided a spatial border to further reduce PTM numbers.
RESULTS
RESULTS
In two different locations over two seasons, we showed that foliar application of phosphite more than halved the PTM larval populations on potato, and that PTM parasitoid numbers were unaffected. No consistent reduction in PTM was achieved by intercropping potato with tomato.
CONCLUSIONS
CONCLUSIONS
Phosphite reduced PTM numbers in the field without interfering with autochthonous parasitoids, indicating its suitability as part of an Integrated Pest Management strategy. Ex situ choice tests showed that phosphite-treated potato deterred PTM, which could be a reason for the control of PTM in the field. © 2018 Society of Chemical Industry.
Substances chimiques
Phosphites
0
Potassium Compounds
0
potassium phosphite
13492-26-7
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
616-621Subventions
Organisme : Swedish Research Council and Swedish International Development Corporation Agency (SIDA)
ID : VR-SWE-2012-092
Informations de copyright
© 2018 Society of Chemical Industry.