Ecological and physiological features of Bt-plants causing outbreaks of secondary pests

Ecological and physiological features of Bt-plants causing outbreaks of secondary pests Reduction in the area occupied with Bt-crops caused by their cost inefficiency largely depends on the outbreaks of secondary pests. Among them, a highly important place belongs to the representatives of the order Hemiptera. These phytophages are insensitive to Cry-proteins of genetically modified (GM) insecticidal crops engineered to control the main pests from the orders Lepidoptera and Coleoptera with chewing mouthparts. In contrast to chewing, evolutionary more advanced piercing-sucking mouthparts of Hemiptera phytophages do not initiate in plants the state of induced defense associated with an elevated content of terpenes. When the main pest is absent, a reduced content of terpenes in Bt-crops makes them more attractive to hemipterans than conventional cultivars. In the absence of the main pest there’s no competition for hemipterous secondary pests. In aggregate, these two factors bring about outbreaks of Hemiptera in Bt-crops. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Ecological and physiological features of Bt-plants causing outbreaks of secondary pests

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Physiology; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443717040185
Publisher site
See Article on Publisher Site

Abstract

Reduction in the area occupied with Bt-crops caused by their cost inefficiency largely depends on the outbreaks of secondary pests. Among them, a highly important place belongs to the representatives of the order Hemiptera. These phytophages are insensitive to Cry-proteins of genetically modified (GM) insecticidal crops engineered to control the main pests from the orders Lepidoptera and Coleoptera with chewing mouthparts. In contrast to chewing, evolutionary more advanced piercing-sucking mouthparts of Hemiptera phytophages do not initiate in plants the state of induced defense associated with an elevated content of terpenes. When the main pest is absent, a reduced content of terpenes in Bt-crops makes them more attractive to hemipterans than conventional cultivars. In the absence of the main pest there’s no competition for hemipterous secondary pests. In aggregate, these two factors bring about outbreaks of Hemiptera in Bt-crops.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Jun 24, 2017

References

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