Pest Management Science (2010) 66, 832-838
Francisco R. Badenes-Perez, Michael Reichelt and David G. Heckel (2010)
Can sulfur fertilisation improve the effectiveness of trap crops for diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae)?
Pest Management Science 66 (8), 832-838
The effect of sulfur fertilisation on chemical constituents of yellow rocket, Barbarea vulgaris (R. Br.), was studied with regard to its potential use as a trap crop for the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae). Two types of B. vulgaris var. arcuata were used: the G-type, resistant to P. xylostella and proposed as a 'dead-end' trap crop, and the P-type, not resistant to P. xylostella and used as a control.
In G-type B. vulgaris, sulfur fertilisation increased the content of the dominant glucosinolate (S)-2-hydroxy-2-phenylethylglucosinolate by 20%. Sulfur fertilisation did not significantly change levels of the saponins 3-0-ß-cellobiosylhederagenin and 3-0-ß-cellobiosyloleanolic acid, known to act as feeding deterrents for P. xylostella larvae. In P-type B. vulgaris, the same levels of sulfur fertilisation did not change the glucosinolate content significantly. Two-choice oviposition preference tests with B. vulgaris plants showed that P. xylostella laid 144% and 45% more eggs on G- and P-type plants with sulfur fertilisation respectively.
The studies suggest that sulfur fertilisation could increase the effectiveness of G-type B. vulgaris as a trap crop for P. xylostella. The effect of plant sulfur fertilisation on P. xylostella oviposition preference is associated with a quantitative glucosinolate increase, but other compounds could also be involved.
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Link to article at publishers website
Database assignments for author(s): Francisco R. Badenes-Perez, David G. Heckel
Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
Pest and/or beneficial records: