Oilseed rape pest

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Biocontrol of Oilseed Rape Pests
Edited by David V. Alford BSc, PhD

Blackwell Science

Biocontrol of Oilseed Rape Pests

Biocontrol of Oilseed Rape Pests
Edited by David V. Alford BSc, PhD

Blackwell Science

© 2003 by Blackwell Science Ltd, a Blackwell Publishing Company Editorial Offices: 9600 Garsington Road, Oxford OX4 2DQ, UK Tel: +44(0)1865 776868 Blackwell Science, Inc.,350 Main Street, Malden, MA 02148-5018, USA Tel: +1 781 388 8250 Iowa State Press, a Blackwell Publishing Company, 2121 State Avenue, Ames, Iowa 50014-8300, USA Tel: +1 515 292 0140 Blackwell Publishing Asia Pty, 550 Swanston Street, Carlton South, Victoria 3053, Australia Tel: +61 (0)3 9347 0300 Blackwell Wissenschafts Verlag, Kurfürstendamm 57, 10707 Berlin, Germany Tel: +49 (0)30 32 79 060 Theright of the Author to be identified as the Author of this Work has been asserted in accordance with the Copyright, Designs and Patents Act 1988. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, except as permitted by the UK Copyright, Designsand Patents Act 1988, without the prior permission of the publisher.

First published 2003 by Blackwell Science Ltd Library of Congress Cataloging-in-Publication Data Biocontrol of oilseed rape pests / edited by David V Alford. p. cm. Includes bibliographical references (p. ). ISBN 0-632-05427-1 (hardback) 1. Rape (Plant)—Diseases and pests— Biological control. 2. Insect pests— Biological control.I. Alford, D. V. SB608.R2 B56 2003 633.8¢5396–dc21 2002013550

ISBN 0-632-05427-1 A catalogue record for this title is available from the British Library Set in 10 on 12 pt Aldine 401 BT by SNP Best-set Typesetter Ltd., Hong Kong Printed and bound in Great Britain by MPG Books Ltd, Bodmin, Cornwall For further information on Blackwell Publishing, visit our website: www.blackwellpublishing.com Contents
Preface 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 The Oilseed Rape Crop Insect Pests of Oilseed Rape Crops Management of Oilseed Rape Pests Parasitoids of Pollen Beetles Parasitoids of Ceutorhynchid Stem Weevils Parasitoids of Cabbage Seed Weevil Parasitoids of Brassica Pod Midge Parasitoids of Flea Beetles Parasitoids of Miscellaneous Pests Sampling, Trapping and Rearing Oilseed RapePests and Their Parasitoids Identification of Hymenopterous Parasitoids Associated with Oilseed Rape Pests Predators of Oilseed Rape Pests Taxonomy and Identification of Predators Sampling, Trapping and Rearing of Predators Impact of On-Farm Landscape Structures and Farming Systems on Predators Predators as Biocontrol Agents of Oilseed Rape Pests Pathogens of Oilseed Rape Pests vii 1 9 43 73 87 97113 125 139 145 161 181 201 235 245 279 299 323 331 343

Glossary Author Index General Index

Preface
Oilseed rape is an important arable crop in many parts of the world, including much of central and northern Europe. The crop is attacked by a wide range of insect pests, many of which are of considerable economic importance. Traditionally, such pests have been targets for the application ofinsecticides. However, nowadays, there is an increasing demand to reduce chemical inputs on arable crops, and an increasing awareness of the potential benefits to be gained from the adoption of non-chemical methods for pest control within sustainable crop management strategies. Although thresholds for chemical control treatments are available for certain oilseed rape pests, these rarely if evertake account of the presence of naturally occurring biocontrol agents (BCAs), and oilseed rape crops are often sprayed unnecessarily. This is wasteful and can have unwarranted detrimental effects on parasitoids and other natural enemies; it can also be harmful to non-target organisms, including pollinating insects such as bees. Although knowledge and expertise of natural enemies of oilseed rape...
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