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Xu, Xiang-Ming, Murray, Roy A., Salazar, Jose D. and Hyder, Kieran 
ORCID: https://orcid.org/0000-0003-1428-5679
(2008)
The effects of temperature, humidity and rainfall on captan decline on apple leaves and fruit in controlled environment conditions.
Pest Management Science, 64 (3).
pp. 296-307.
ISSN 1526-498X
Abstract
BACKGROUND: Captan is an important fungicide for controlling diseases in horticultural crops. Predicting its dissipation is important for estimating dietary risks and optimising pesticide application. Experiments were conducted to determine the relationship of captan loss on apple leaves with temperature, humidity and rainfall, and to investigate captan loss on fruit in dry conditions. RESULTS: There was large unit-to-unit variability in captan residues in spite of the controlled application. Temperature and humidity had negligible effects on captan loss. Captan loss is predominately due to washoff by rain, although a certain proportion of captan may bind to the plant surface tightly and hence may not be readily removed by rain. About 50% of captan can be washed off by as little as 1 mm of rain after an application, and the loss appeared not to relate to the amount of rain. Under dry conditions, daily loss of captan is estimated to be around 1% on both fruit and leaves, giving a half-life of ca 70 days. CONCLUSIONS: Captan loss on leaf and fruit surfaces is primarily due to rain washoff.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | captan,dissipation,humidity,modelling,rain washoff,temperature,agronomy and crop science,insect science ,/dk/atira/pure/subjectarea/asjc/1100/1102 |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Collaborative Centre for Sustainable Use of the Seas |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 25 Nov 2023 03:23 |
| Last Modified: | 28 Nov 2023 03:01 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/93827 |
| DOI: | 10.1002/ps.1520 |
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