Development of resistant pasture and methods of pasture management for grass grub (Costelytra zealandica(White)) control
| Autor: | D. S. Atkinson, W. M. Kain |
|---|---|
| Rok vydání: | 1977 |
| Předmět: |
geography
Poa pratensis geography.geographical_feature_category biology Costelytra zealandica fungi Lotus food and beverages Soil Science Plant Science biology.organism_classification Pasture Phalaris tuberosa Agronomy Trifolium repens Animal Science and Zoology Agronomy and Crop Science Legume Holcus lanatus |
| Zdroj: | New Zealand Journal of Agricultural Research. 20:507-517 |
| ISSN: | 1175-8775 0028-8233 |
| DOI: | 10.1080/00288233.1977.10427367 |
| Popis: | In the field, larval resistance in Holcus lanatus and Phalaris tuberosa was identified and resistance in Lotus pedunculatus, Medicago sativa, and Poa pratensis confirmed. Trifoliate legumes were extremely favourable host plants for larvae in comparison with grasses, and larval populations particularly during the early larval stages were sensitive to differences in the legume: grass ratio of pastures. For the range of plants and cultivars studied in the laboratory, larvae were able to differentiate between legume and grass roots, but could not distinguish between roots of legumes which are resistant and susceptible host plants. The performance of larvae under laboratory and field conditions, in terms of growth and density under well-balanced grass-legume mixtures closely paralleled that under the pure legume. The addition of L. pedunculatus to Trifolium repens markedly decreased larval performance. Larval weight-density relationships were studied and enabled calculation of critical weights of larv... |
| Databáze: | OpenAIRE |
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