The efficiency of the newly launched predatory mite Amblydromalus limonicus : biological control of thrips in cucumber
In this study, the efficiency of a newly launched predatory mite, Amblydromalus limonicus, has been examined for its potential to use as a biological control agent in cucumber production. A. limonicus can be used for biological control of two thrips species, Frankliniella occidentalis and Thrips t...
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| Formato: | H2 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Plant Breeding (from 130101)
2013
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| Materias: |
| _version_ | 1855570820875681792 |
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| author | Skytte af Sätra, Erika |
| author_browse | Skytte af Sätra, Erika |
| author_facet | Skytte af Sätra, Erika |
| author_sort | Skytte af Sätra, Erika |
| collection | Epsilon Archive for Student Projects |
| description | In this study, the efficiency of a newly launched predatory mite, Amblydromalus limonicus, has been
examined for its potential to use as a biological control agent in cucumber production. A. limonicus
can be used for biological control of two thrips species, Frankliniella occidentalis and Thrips tabaci.
Field trials were conducted in greenhouses of two conventional cucumber growers in Scania, the
southern part of Sweden. The basic control agent used against thrips was the predatory mite
Amblyseius swirskii. In selected areas, additional A. limonicus was released. A. limonicus were
released twice after the transplantation of the second crop in a dose of 100 predatory mites per
square meter, with a two week interval. The thrips population was monitored in three ways during
the season; counting of trips caught on blue sticky traps and counting of thrips found in the flowers
and on the leafs. The results indicate that the thrips population on plants decreased when both
predatory mites, A. swirskii and A. limonicus, were released. The overall low thrips infestation may
have contributed to a negative interaction between A. swirskii and A. limonicus, due to cannibalistic
behavior. Following the second release of A. limonicus, a lower total density of predatory mites were
found. The area treated with only A. swirskii had a higher total predatory mite density which
indicates that A. swirskii is efficient at this level of pest infestation. One of the growers leaves the
greenhouse empty for two weeks between the two cultures. Following this period the population of
F. occidentalis decreased to a low level. This raises the question whether this kind of treatment can
be useful in an integrated pest management strategy. |
| format | H2 |
| id | RepoSLU5293 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2013 |
| publishDateSort | 2013 |
| publisher | SLU/Dept. of Plant Breeding (from 130101) |
| publisherStr | SLU/Dept. of Plant Breeding (from 130101) |
| record_format | eprints |
| spelling | RepoSLU52932015-03-22T15:11:46Z The efficiency of the newly launched predatory mite Amblydromalus limonicus : biological control of thrips in cucumber Effektiviten hos det nylanserade rovkvalster Amblydromalus limonicus : biologisk kontroll av trips i gurkodling Skytte af Sätra, Erika Biological Control Amblydromalus limonicus Frankliniella occidentalis Cucumber In this study, the efficiency of a newly launched predatory mite, Amblydromalus limonicus, has been examined for its potential to use as a biological control agent in cucumber production. A. limonicus can be used for biological control of two thrips species, Frankliniella occidentalis and Thrips tabaci. Field trials were conducted in greenhouses of two conventional cucumber growers in Scania, the southern part of Sweden. The basic control agent used against thrips was the predatory mite Amblyseius swirskii. In selected areas, additional A. limonicus was released. A. limonicus were released twice after the transplantation of the second crop in a dose of 100 predatory mites per square meter, with a two week interval. The thrips population was monitored in three ways during the season; counting of trips caught on blue sticky traps and counting of thrips found in the flowers and on the leafs. The results indicate that the thrips population on plants decreased when both predatory mites, A. swirskii and A. limonicus, were released. The overall low thrips infestation may have contributed to a negative interaction between A. swirskii and A. limonicus, due to cannibalistic behavior. Following the second release of A. limonicus, a lower total density of predatory mites were found. The area treated with only A. swirskii had a higher total predatory mite density which indicates that A. swirskii is efficient at this level of pest infestation. One of the growers leaves the greenhouse empty for two weeks between the two cultures. Following this period the population of F. occidentalis decreased to a low level. This raises the question whether this kind of treatment can be useful in an integrated pest management strategy. Målet med denna studie har varit att utvärdera effektiviteten hos ett nylanserat rovkvalster, Amblydromalus limonicus, som biologisk kontroll mot trips i konventionell gurkodling. A. limonicus användes för biologisk kontroll mot två tripsarter, Frankliniella occidentalis och Thrips tabaci. Fältförsök har gjorts under säsongen 2012 hos två växthusodlare i Skåne som bedriver konventionell gurkodling. Som basprodukt i bekämpning av trips användes rovkvalstret Amblyseius swirskii. Utvalda ytor behandlades även med A. limonicus. A. limonicus sattes ut i en dos om 100 rovkvalster per kvadratmeter vid två tidpunkter, med två veckors intervall. Tripspopulationen studerades under säsongen genom att räkna antalet trips som fastnat på blå klisterskivor som var placerade i varje växthus samt att räkna antalet trips på blad och i blommor. Resultaten indikerar att tripspopulationen på plantorna minskar när A.swirskii sätts ut och att den inte påverkas vidare av A. limonica. Efter andra utsättningen av A. limonicus hade de områden som enbart var behandlade med A. swirskii fler rovkvalster. Den större populationen av rovkvalster antas bero på det överlag låga tripsangreppet vilket kan ha medför en negativ interaktion mellan A. swirskii och A. limonicus, i form av kannibalism. Sammantaget indikerar resultaten att A. swirskii är tillräcklig vid tripsangrepp i denna storlek. Den ena odlaren tömmer sitt växthus under två veckor mellan de två odlingskulturerna. Efter denna period minskade tripspopulationen drastiskt. Det är därför intressant att ställa frågan huruvida den typen av behandling skulle kunna tillämpas i ett integrerat växtskyddsprogram. SLU/Dept. of Plant Breeding (from 130101) 2013 H2 eng swe https://stud.epsilon.slu.se/5293/ |
| spellingShingle | Biological Control Amblydromalus limonicus Frankliniella occidentalis Cucumber Skytte af Sätra, Erika The efficiency of the newly launched predatory mite Amblydromalus limonicus : biological control of thrips in cucumber |
| title | The efficiency of the newly launched predatory
mite Amblydromalus limonicus : biological control of thrips in cucumber |
| title_full | The efficiency of the newly launched predatory
mite Amblydromalus limonicus : biological control of thrips in cucumber |
| title_fullStr | The efficiency of the newly launched predatory
mite Amblydromalus limonicus : biological control of thrips in cucumber |
| title_full_unstemmed | The efficiency of the newly launched predatory
mite Amblydromalus limonicus : biological control of thrips in cucumber |
| title_short | The efficiency of the newly launched predatory
mite Amblydromalus limonicus : biological control of thrips in cucumber |
| title_sort | efficiency of the newly launched predatory
mite amblydromalus limonicus : biological control of thrips in cucumber |
| topic | Biological Control Amblydromalus limonicus Frankliniella occidentalis Cucumber |