Sublethal effects of spirodiclofen on life history and life-table parameters of two-spotted spider mite (Tetranychus urticae)
β Scribed by Dejan Marcic
- Publisher
- Springer Netherlands
- Year
- 2007
- Tongue
- English
- Weight
- 388 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0168-8162
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## Abstract In this study we assess the effect of pyrrolizidine alkaloids (PAs) extracted from __Lithospermum canescens__ on the biology of the twoβspotted spider mite (__Tetranychus urticae Koch__). __Lithospermum canenscens__ (Michaux) Lehm. (__Boraginaceae__) is a common prairie plant also known
Colupulone, the main component of the beta-acid fraction of hop extracts, was shown to repel the two-spotted spider mite Tetranychus urticae Koch from the surface of plant leaves. The total beta-acid fraction was found more effective in repelling the mites and reducing the number of eggs laid than c