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| Titel: |
Investigation of Spray Application of Microbial Herbicides Using Alternaria alternata on Amaranthus retroflexus |
| Auteur: |
Lawrie, J. Greaves, M. P. Down, V. M. Western, N. M. Jaques, S. J. |
| Verschenen in: |
Biocontrol science and technology |
| Paginering: | Jaargang 12 (2002) nr. 4 pagina's 469-479 |
| Jaar: |
2002-08-01 |
| Inhoud: |
Inclusion of Alternaria alternata conidia in a spray formulation affected the distribution pattern on the target. The dry weight of Amaranthus retroflexus plants was reduced by more than 83% when A. alternata conidia (107 ml -1 ) were applied at 200 L ha -1 or greater and when given a 24 h dew period. At low application volumes (25 or 50 L ha -1 ) plant dry weight was reduced by only 29 or 54%. After 7-8 h dew period, conidial germination on the leaf surface was 11-19%. This increased to 62-91% after 24 h dew period. Counts of conidia on leaves indicated that up to 86% of the conidia sprayed were not retained on the target plant, or did not reach it. This is reflected in lesion numbers per unit area being only 3-5% of the calculated theoretical numbers. The results cast doubt on the suitability of A. alternata as a microbial herbicide for the control of Am. retroflexus . |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 10 gevonden artikelen
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