+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Effects of Bt plants on the development and survival of the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) in susceptible and Bt-resistant larvae of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)



Effects of Bt plants on the development and survival of the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) in susceptible and Bt-resistant larvae of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)



Journal of Insect Physiology 50(5): 435-443



A range of crops have been transformed with delta-endotoxin genes from Bacillus thuringiensis (Bt) to produce transgenic plants with high levels of resistance to lepidopteran pests. Parasitoids are important natural enemies of lepidopteran larvae and the effects of Bt plants on these non-target insects have to be investigated to avoid unnecessary disruption of biological control. This study investigated the effects of Cry1Ac-expressing transgenic oilseed rape (Brassica napus) on the solitary braconid endoparasitoid Cotesia plutellae in small-scale laboratory experiments. C. plutellae is an important natural enemy of the diamondback moth (Plutella xylostella), the most important pest of brassica crops world-wide. Bt oilseed rape caused 100% mortality of a Bt-susceptible P. xylostella strain but no mortality of the Bt-resistant P. xylostella strain NO-QA. C. plutellae eggs laid in Bt-susceptible hosts feeding on Bt leaves hatched but premature host mortality did not allow C. plutellae larvae to complete their development. In contrast, C. plutellae developed to maturity in Bt-resistant hosts fed on Bt oilseed rape leaves and there was no effect of Bt plants on percentage parasitism, time to emergence from hosts, time to adult emergence and percentage adult emergence from cocoons. Weights of female progeny after development in Bt-resistant hosts did not differ between plant types but male progeny was significantly heavier on wildtype plants in one of two experiments. The proportion of female progeny was significantly higher on Bt plants in the first experiment with Bt-resistant hosts but this effect was not observed again when the experiment was repeated.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 004130452

Download citation: RISBibTeXText

PMID: 15121457

DOI: 10.1016/j.jinsphys.2004.03.001


Related references

Effects of Bacillus thuringiensis on adults of Cotesia plutellae (Hymenoptera: Braconidae), a parasitoid of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). Biocontrol Science and Technology 9(3): 435-440, 1999

Independent and combined effects of Bacillus thuringiensis and the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) on susceptible and resistant diamondback moth (Lepidoptera: Plutellidae). Journal of Economic Entomology 90(2): 397-403, 1997

Simulation of integration of Bacillus thuringiensis and the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) for control of susceptible and resistant diamondback moth (Lepidoptera: Plutellidae). Environmental Entomology 28(3): 505-512, 1999

An evidence to use Cotesia plutellae (Kurdjumov) (Hymenoptera: Braconidae) as a field control agent against diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae). JOURNAL OF ASIA PACIFIC ENTOMOLOGY 9(1): 55-59, 2006

An evidence to use Cotesia plutellae (Kurdjumov) (Hymenoptera: Braconidae)as a field control agent against diamondback moth, Plutella xylostella L.(Lepidoptera: Plutellidae). Journal of Asia-Pacific Entomology 9(1): 55-59, 2006

Biological studies on Microplitis plutellae Hymenoptera Braconidae, a larval parasitoid of diamondback moth, Plutella xylostella Lepidoptera Plutellidae. Formosan Entomologist 241: 1-13, 2004

Differential parasitism of Plutella xylostella (Lepidoptera: Plutellidae) larvae by the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) on two host plant species. Bulletin of Entomological Research 93(1): 65-72, 2003

Competition between Diadegma insulare (Hymenoptera:Ichneumonidae) and Microplitis plutellae (Hymenoptera:Braconidae) for larvae of the diamondback moth, Plutella xylostella (Lepidoptera:Plutellidae). Proceedings of the Entomological Society of Ontarioub 1984) 114(114): 1-10, 1984

Competition between diadegma insulare hymenoptera ichneumonidae and microplitis plutellae hymenoptera braconidae for larvae of the diamondback moth plutella xylostella lepidoptera plutellidae. Proceedings of the Entomological Society of Ontario 114: 1-10, 1983

Introduction to Venezuela and biology of Cotesia plutellae Kurdj. (Hymenoptera: Braconidae), parasitoid of Plutella xylostella L. (Lepidoptera: Plutellidae). Manejo Integrado de Plagas ( 29): 24-27, 1993

Reproductive isolation and differentiation between five populations of Cotesia plutellae (Hymenoptera: Braconidae), parasitoid of Plutella xylostella (Lepidoptera: Plutellidae). Biological Control 36(2): 171-182, 2006

Population density of Plutella xylostella (Lepidoptera: Plutellidae) and its parasitoid Cotesia plutellae (Hymenoptera: Braconidae) on two varieties of cabbage in an urban environment. Applied Entomology and Zoology 36(3): 353-360, 2001

Parasitism of diamondback moth (Lepidoptera: Plutellidae) larvae by Cotesia plutellae (Hymenoptera: Braconidae) and Diadegma insulare (Hymenoptera: Ichneumonidae) in cabbage fields after inundative releases of C. plutellae. Journal of Entomological Science 34(1): 101-112, 1999

Non-host plant extracts reduce oviposition of Plutella xylostella (Lepidoptera: Plutellidae) and enhance parasitism by its parasitoid Cotesia plutellae (Hymenoptera: Braconidae). Bulletin of Entomological Research 96(4): 373-378, 2006

Oviposition response of Cotesia plutellae (Hymenoptera: Braconidae) to sterile and normal diamondback moth (Lepidoptera: Plutellidae) larvae. Environmental Entomology 27(6): 1520-1524, 1998