Genetic analysis of the QRPH strain of two spotted spider mite Tetranychus urticae Koch indicates that hexythiazox resistance in that strain is not sex linked and has a dominance factor of 0.152 (incomplete dominance). Hexythiazox resistance appears to be controlled by a single gene. ~This work cont
Esterase polymorphism in several populations of the two-spotted spider mite,Tetranychus urticaeKoch
✍ Scribed by J. Šula; F. Weyda
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 645 KB
- Volume
- 39
- Category
- Article
- ISSN
- 1420-682X
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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
The morphology and behaviour of the holokinetic chromosomes of Tetranychus urticae Koch were studied in maturing oocytes from diplotene up to and including metaphase. Each of the three diplotene bivalents contains 2-3 chiasmata. During congression the dyads of the axially orientated bivalents make