Rutabaga roots, a rich source of oviposition stimulants for the cabbage root fly |
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| Authors: | Ruurd de Jong Nevile Maher Bruno Patrian Erich St?dler and Tammo Winkler |
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| Institution: | (1) Eidg. Forschungsanstalt, Schloss 335, Postfach 185, CH-8820 W?denswil, Switzerland, e-mail: ruurd.de.jong@faw.admin.ch, CH;(2) Current address: INRA Santé Végétale, Laboratoire de Zoologie, BP 81, F-33883 Villenave d'Oron, France, FR;(3) Novartis Crop Protection AG, CH-4002 Basel, Switzerland, CH |
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| Abstract: | Summary. Two recently identified compounds ("CIFs"), present on the leaf surface of Brassica oleracea (cabbage), are the strongest oviposition stimulants known for the cabbage root fly, Delia radicum. Cabbage leaves contain these compounds in extremely low concentrations, and the amount of CIFs obtained from purifying leaf
extracts was so small that it limited further research. We were able to purify far more of these two compounds from the roots
of Brassica napus var. napobrassica (rutabaga). Apart from being a richer source of CIFs, rutabaga roots are considerably easier to collect and process than
leaves. In addition, we isolated and identified a new CIF compound from the roots that is also very active in stimulating
oviposition in the cabbage root fly.
Received 26 May 2000; accepted 26 July 2000 |
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| Keywords: | ,Delia radicum (Diptera, Anthomyiidae) –, rutabaga –, oviposition –, 1,2-dihydro-6-methoxy-3-thia-4,10,10b-triaza-cyclopenta[,a,]fluorene-l-carboxylic,,,,,acid –, cabbage root fly |
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