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Developing IPM tools for greenhouse cucumber production in Sweden – a participatory action research approach

control of the European tarnished plant bug and cucurbit powdery mildew

Rur, Mira (2016). Developing IPM tools for greenhouse cucumber production in Sweden – a participatory action research approach. Alnarp : Sveriges lantbruksuniv.
ISBN 978-91-576-9428-7
eISBN 978-91-576-9429-4
[Licentiate thesis]

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Abstract

Two of the most important plant protection problems in Swedish cucumber production are the European Tarnished Plant Bug (ETPB), and Cucurbit Powdery mildew (CPM). The control of the ETPB relies on Imidacloprid, a pesticide, which breaks down slowly and is harmful to beneficial insects. CPM fungi has begun to develop resistance to the commonly used fungicide (Imazalil) rendering its current use less effective.

The main objective of this thesis was to evaluate alternative control methods for future incorporation into IPM strategies against ETPB and CPM using a participatory action research (PAR) approach. Towards this aim, two projects, tackling both of these problems were conducted in consultation between growers, researchers and advisors.

The specific objectives of the ETPB project were to 1) compare responses of the ETPB to cucumber and candidate trap crops in olfactometer assays, 2) examine the responses of the ETPB to headspace volatile collections of candidate trap crops, 3) identify the attracting chemical compounds and 4) examine if sunflower could serve as a trap crop for ETPB in commercial cucumber greenhouses. The specific objectives of the CPM project were to 1) screen for effective alternative products against CPM and 2) to evaluate these, alone and in combination with Imazalil at different application intervals and in cultivars with different levels of resistance.

The ETPB study showed that sunflower was more attractive than cucumber in greenhouse experiments but did not provide a sufficient level of control. In olfactometer assays, adults were more attracted to odours from flowering sunflower or lucerne than odours from flowering cucumber. Chemical analysis of plant odours showed a distinct differentiation between sunflower and cucumber. Sunflower exclusively released a number of monoterpenes and had an overall emission rate almost four times higher than cucumber. Therefore, it may be possible to use synthetic sunflower volatiles to attract ETPBs in the future.

In semi-commercial CPM experiments, Sakalia, based on Reynoutria sachaliensis combined with Yuccah, a wetting agent, based on Yucca Schidigera, applied at 7-day intervals, consistently had the most suppressive effect, on CPM disease severity in two commercial cucumber cultivars. Further testing of this combination in commercial greenhouses is proposed to enable evaluation of the potential effects on yield and beneficial insects. The PAR approach took advantage of the knowledge and experience of researchers, advisors and growers and was seen as highly rewarding by all participants. Based on the results from this thesis, a potential future IPM strategy to control the major insect and fungal pests of cucumber is proposed.

Authors/Creators:Rur, Mira
Title:Developing IPM tools for greenhouse cucumber production in Sweden – a participatory action research approach
Subtitle:control of the European tarnished plant bug and cucurbit powdery mildew
Year of publishing :16 September 2016
Depositing date:16 September 2016
Number of Pages:68
Papers/manuscripts:
NumberReferences
IOndiaka S, Migiro L, Rur M, Birgersson G, Porcel M, Rämert B, Tasin M. 2015. Sunflower as a trap crop for the European tarnished plant bug (Lygus rugulipennis), Journal of Applied Entomology 140 (6), 453-461.
IIRur M., Rämert B., Hökeberg M., Vetukuri R. R., Grenville-Briggs L., Liljeroth E. Screening of alternative products for integrated pest management of cucumber powdery mildew in Sweden (manuscript).
Place of Publication:Alnarp
Publisher:Department of Plant Protection Biology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-9428-7
ISBN for electronic version:978-91-576-9429-4
Language:English
Publication Type:Licentiate thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H01 Protection of plants - General aspects
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture
Agrovoc terms:integrated pest management, cucumis sativus, cucumbers, greenhouse crops, powdery mildews, sphaerotheca fuliginea, lygus rugulipennis, pest insects, helianthus annuus, trap crops, participatory approaches, sweden
Keywords:European tarnished plant bug, Lygus rugulipennis, Cucurbit powdery mildew, Podosphaera xanthii, Participatory action research, greenhouse cropping systems, Integrated pest management
URN:NBN:urn:nbn:se:slu:epsilon-e-3664
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3664
ID Code:13668
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: Mira Rur
Deposited On:19 Sep 2016 06:06
Metadata Last Modified:19 Sep 2016 06:06

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